Cisco IOS XR Multicast Command Reference for the Cisco CRS Router, Release 4.1
Multicast Routing and Forwarding Commands on Cisco IOS XR Software
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Multicast Routing and Forwarding Commands on Cisco IOS XR Software

Contents

Multicast Routing and Forwarding Commands on Cisco IOS XR Software

This module describes the commands used to configure and monitor multicast routing on the Cisco IOS XR Software .

For detailed information about multicast routing concepts, configuration tasks, and examples, refer to the Implementing Multicast Routing on Cisco IOS XR Software configuration module in the Cisco IOS XR Multicast Configuration Guide for the Cisco CRS Router.

accounting per-prefix

To enable accounting for multicast routing, use the accounting per-prefix command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

accounting per-prefix

no accounting per-prefix

Syntax Description

This command has no keywords or arguments.

Command Default

This feature is disabled by default.

Command Modes

Multicast routing configuration

Multicast routing address family IPv4 and IPv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The accounting per-prefix command is used to enable per-prefix counters only in hardware. Cisco IOS XR Software counters are always present. When enabled, every existing and new (S, G) route is assigned forward, punt, and drop counters on the ingress route and forward and punt counters on the egress route. The (*, G) routes are assigned a single counter.

There are a limited number of counters on all nodes. When a command is enabled, counters are assigned to routes only if they are available.

Because the use of this counter can be resource-intensive when a large number of routes are configured, such as for multicast VPN (there is a limit of 150,000 routes to a router), use the show mfib hardware resource-counters command in EXEC mode to check resource allocation. Should hardware resource allocation be an issue, we recommend the use of the accounting per-prefix forward-only command.

To verify the number of statistics allocated or free on a line card, use the show mfib hardware resource-counters command in EXEC mode.

You may switch between accounting-perprefix and accounting per-prefix forward-only statistics on any (S,G) route. However, be aware that only one set of counters is supported on the (*,G) routes (with fwd/punt/drop on ingress and fwd/drop on egress) regardless of whether you enabled the accounting-perprefix or accounting-perprefix fwd-only command.

Although you can switch accouting modes, this involves freeing the hardware statistics and reallocating them, thereby resulting in a loss of any previously collected data. Therefore, it is preferable to decide which statistics mode you want to use at the start to avoid the resource cost entailed by resetting the statistics counter values with a change in mode.

To display packet statistics, use the show mfib route and the show mfib hardware route statistics commands. These commands display “N/A” for counters when no hardware statistics are available or when neither the accounting per-prefix command nor the accounting per-prefix forward-only command is enabled.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable accounting for multicast routing:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# accounting per-prefix

Related Commands

Command

Description

accounting per-prefix forward-only

Reduces hardware statistics resource allocations when enabling accounting, particularly for multicast VPN (MVPN).  

clear mfib hardware resource-counters

Clears global resource counters.  

show mfib hardware route statistics

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

accounting per-prefix forward-only

To reduce hardware statistics resource allocations when enabling accounting, particularly for multicast VPN (MVPN), use the accounting per-prefix forward-only command under multicast routing configuration mode. To return to the default mode of accounting per-prefix, use the no form of this command.

accounting per-prefix forward-only

no accounting per-prefix forward-only

Syntax Description

This command has no keywords or arguments.

Command Default

If no counters were configured, there is no default.

If the accounting per-prefix counter was previously configured, it becomes the default.

If no accounting was configured for multicast routing, forwarding-only is the default mode and triggers a data MDT transition in the case of MVPN deployment.

Command Modes

Multicast routing configuration

Multicast routing address family IPv4 and IPv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.


Note


The accounting per-prefix forward-only command has only one fwd-only counter. In other words, there is no punt or drop counter allocated.


We recommended this command for configuration of multicast VPN routing or for any line card that has a route-intensive configuration. Each individual router can support up to 150,000 routes.


Note


To verify the number of statistics allocated or free on a line card, use the show mfib hardware resource-counters command in EXEC mode.


There are a limited number of counters on all nodes. When accounting on a prefix is enabled, counters are assigned to routes only if they are available.

To display packet statistics, use the show mfib route and the show mfib hardware route statistics commands. These commands display “N/A” for counters when no hardware statistics are available or when neither the accounting per-prefix command nor the accounting per-prefix forward-only command are enabled.

You may switch between accounting-perprefix and accounting per-prefix forward-only statistics for ipv4 or ipv6 multicast family. However, be aware that only one set of counters is supported on the (*,G) routes (with fwd/punt/drop on ingress and fwd/drop on egress) regardless of whether you enabled the accounting-perprefix or accounting-perprefix fwd-only command.

Although you can switch accouting modes, this involves freeing the hardware statistics and reallocating them, thereby resulting in a loss of any previously collected data. Therefore, it is preferable to decide which statistics mode you want to use at the start to avoid the resource cost entailed by resetting the statistics counter values with a change in mode.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable accounting per-prefix forward-only for MVPN routing:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# accounting per-prefix forward-only 

Related Commands

Command

Description

accounting per-prefix

Enables accounting for multicast routing.  

clear mfib hardware resource-counters

Clears global resource counters.  

address-family (multicast)

To display available IP prefixes to enable multicast routing and forwarding on all router interfaces, use the address-family command in multicast-routing configuration mode or multicast VRF configuration submode. To disable use of an IP address prefix for routing, use the no form of this command.

address-family [ vrf vrf-name ] { ipv4 | ipv6 }

no address-family [ vrf vrf-name ] { ipv4 | ipv6 }

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

Specifies IPv4 address prefixes.

ipv6

Specifies IPv6 address prefixes.

Command Default

No default behavior or values

Command Modes

Multicast routing configuration

Multicast VRF configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.7.0

This command was documented as a multicast command.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the address-family command either from multicast routing configuration mode or from multicast VRF configuration submode to enter either the multicast IPv4 or IPv6 address family configuration submode, depending on which keyword was chosen. Use the address-family command with the multicast-routing command to start the following multicast processes:

  • Multicast Routing Information Base (MRIB)
  • Multicast Forwarding Engine (MFWD)
  • Protocol Independent Multicast Sparse mode (PIM-SM)
  • Internet Group Management Protocol (IGMP)
  • Multicast Listener Discovery Protocol (MLD)
  • Multicast Routing Information Base (MRIB)
  • Multicast Forwarding Engine (MFWD)
  • Protocol Independent Multicast Sparse mode (PIM-SM)
  • Internet Group Management Protocol (IGMP)

To enable multicast routing and protocols on interfaces, you must explicitly enable the interfaces using the interface command in multicast routing configuration mode. This action can be performed on individual interfaces or by configuring a wildcard interface using the alias command.

To enable multicast routing on all interfaces, use the interface all enable command in multicast routing configuration mode. For any interface to be fully enabled for multicast routing, it must be enabled specifically (or configured through the interface all enable command for all interfaces) in multicast routing configuration mode, and it must not be disabled in the PIM and IGMP configuration modes.


Note


The enable and disable keywords available under the IGMP and PIM interface configuration modes have no effect unless the interface is enabled in multicast routing configuration mode—either by default or by explicit interface configuration.


To allow multicast forwarding functionality, while turning multicast routing functionality off, interface-inheritance disable command on a per interface or interface all enable basis in PIM or IGMP configuration mode.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enter IPv6 multicast routing configuration mode:

RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# address-family 

ipv6
RP/0/RP0/CPU0:router(config-mcast-default-
ipv6)# 

The following example shows how to enter IPv6 VRF multicast routing configuration submode:

RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# vrf vrf-name address-family 

ipv6
RP/0/RP0/CPU0:router(config-mcast-vrf-name-
ipv6)# 

Related Commands

Command

Description

alias

Creates a command alias.

interface all enable

Enables multicast routing and forwarding on all new and existing interfaces.

interface all disable

Disables PIM processing on all new and existing interfaces.

interface-inheritance disable

Separates the disabling of multicast routing and forwarding.

interface (multicast)

Configures multicast interface properties.

boundary

To configure the multicast boundary on an interface for administratively scoped multicast addresses, use the boundary command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

boundary access-list

no boundary access-list

Syntax Description

access-list

Access list specifying scoped multicast groups. The name cannot contain a space or quotation mark; it may contain numbers.

Command Default

A multicast boundary is not configured.

Command Modes

Multicast routing interface configuration

Multicast routing VRF interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

This command was supported in multicast routing VRF interface configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The boundary command is used to set up a boundary to keep multicast packets from being forwarded.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to set up a boundary for all administratively scoped addresses:

RP/0/RP0/CPU0:router# access-list 1 deny 239.0.0.0 0.255.255.255
RP/0/RP0/CPU0:router# access-list 1 permit 224.0.0.0 15.255.255.255
RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# interface GigE 0/2/0/2
RP/0/RP0/CPU0:router(config-mcast-default-ipv4-if)# boundary 1

clear mfib counter

To clear Multicast Forwarding Information Base (MFIB) route packet counters, use the clear mfib counter command in EXEC mode.

clear mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] counter [ group-address | source-address ] [ location { node-id | all } ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

group-address

(Optional) IP address of the multicast group.

source-address

(Optional) IP address of the source of the multicast route.

location node-id

(Optional) Clears route packet counters from the designated node.

all

The all keyword clears route packet counters on all nodes

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.2

The ipv4 and ipv6 keywords were added.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.


Note


This command only clears MFIB route packet software counters. To clear MFIB hardware statistics counters use the clear mfib hardware route statistics command.


Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to clear MFIB route packet counters on all nodes:

RP/0/RP0/CPU0:router# clear mfib counter location all 

clear mfib database

To clear the Multicast Forwarding Information Base (MFIB) database, use the clear mfib database command in EXEC mode.

clear mfib [ ipv4 | ipv6 ] database [ location { node-id | all } ]

Syntax Description

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

(Optional) Clears global resource counters from the designated node.

all

The all keyword clears all global resource counters.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.2

The ipv4 and ipv6 keywords were added.

Release 3.5.0

The location keyword was changed from optional to required.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read, write, execute

Examples

The following example shows how to clear the Multicast Forwarding Information Base (MFIB) database on all nodes:

RP/0/RP0/CPU0:router# clear mfib database location all 

clear mfib hardware adjacency-counters

To clear the platform-specific information related to resource counters for the Multicast Forwarding Information Base, use the clear mfib hardware adjacency-counters command in EXEC mode.

clear mfib [ vrf vrf-name ] [ipv4] hardware adjacency-counters [ rx | tx ] [ location { node-id | all } ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

rx

Clears adjacency counters for packets received.

tx

Clears adjacency counters for packets sent.

location node-id

(Optional) Clears adjacency counters from the designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read, write, execute

Examples

The following example shows how to clear all adjacency counters:

RP/0/RP0/CPU0:router# clear mfib hardware adjacency-counters rx location all

Related Commands

Command

Description

show mfib hardware resource-counters

Displays the allocated and freed hardware resources for the Multicast Forwarding Information Base (MFIB) process.  

clear mfib hardware resource-counters

To clear global resource counters, use the clear mfib hardware resource-counters command in EXEC mode.

clear mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware resource-counters [ location { node-id | all } ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

(Optional) Clears global resource counters from the designated node.

all

The all keyword clears all global resource counters.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.2

The ipv4 and ipv6 keywords were added.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

The location keyword was changed from optional to required.

Release 3.7.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the clear mfib hardware resource-counters to estimate resource usage for an operation.

Task ID

Task ID

Operations

multicast

read, write, execute

Examples

The following example shows how to clear all global resource counters:

RP/0/RP0/CPU0:router# clear mfib hardware resource-counters location all

Related Commands

Command

Description

show mfib hardware route statistics

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route.  

clear mfib hardware route statistics

To reset all allocated counter values matching (S,G) or (*,G) criteria regardless of the Multicast Forwarding Information Base (MFIB) hardware statistics mode (accounting per-prefix or accounting per-prefix forward-only) , use the clear mfib hardware route statistics command in EXEC mode.

clear mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware route statistics { egress | ingress | ingress-and-egress } [ * | source-address ] [ group-address [ /prefix-length ] ] [ location { node-id | all } ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

egress

(Optional) Clears hardware statistics only on the specified outgoing route.

ingress

(Optional) Clears hardware statistics only on the specified incoming route.

ingress-and-egress

(Optional) Clears hardware statistics on both the incoming (ingress) and outgoing (egress) routes.

*

(Optional) Clears shared tree route statistics.

source-address

(Optional) IP address or hostname of the multicast route source.

group-address

(Optional) IP address or hostname of the multicast group.

/ prefix-length

(Optional) Prefix length of the multicast group. A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). A slash must precede the decimal value.

location

(Optional) Clears route packet counters from the designated node.

node-id

The node-id argument is entered in the rack/slot/module notation.

all

The all keyword clears route packet counters on all nodes

Command Default

If not specified, IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.2

The ipv4 and ipv6 keywords were added.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

The location keyword was changed from optional to required.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs.

The Multicast Forwarding (MFWD) process exists on each line card and assigns hardware counters to each (S, G) route. Additionally, one global counter is assigned for all (*, G) routes, depending on resource availability.

To clear the set of counters for (*, G) routes, the MFWD process assigns a single set of counters to count packets that match (*, G) routes. Consequently, the clear mfib hardware route statistics command must be used in a form that either clears counters on all routes or matches all (*, G) routes.


Note


This command only clears MFIB hardware statistics counters. To clear MFIB route packet software counters, use the clear mfib counter command.


This command can be used regardless of the statistics mode, in other words, either accounting per-prefix or accounting per-prefix forward-only.


Note


This command does not clear global (*, G) counters.


Task ID

Task ID

Operations

multicast

read, write, execute

Examples

The following command shows how to clear counters by route statistics for all multicast routes on both ingress and egress forwarding engines for the line card 0/1/CPU0:

RP/0/RP0/CPU0:router# clear mfib ipv4 hardware route statistics ingress-and-egress location 0/1/CPU0 

The following example shows how to clear the counters only on the ingress forwarding engine for (S, G) routes with the group address 224.1.1.1:

RP/0/RP0/CPU0:router# clear mfib hardware route statistics ingress 224.1.1.1 location 0/1/CPU0

Related Commands

Command

Description

accounting per-prefix

Enables accounting for multicast routing.  

accounting per-prefix forward-only

Reduces hardware statistics resource allocations when enabling accounting, particularly for multicast VPN (MVPN).  

show mfib hardware route statistics

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route.  

disable (multicast)

To disable multicast routing and forwarding on an interface, use the disable command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

disable

no disable

Syntax Description

This command has no keywords or arguments.

Command Default

Multicast routing and forwarding settings are inherited from the global interface enable all command. Otherwise, multicast routing and forwarding is disabled.

Command Modes

Multicast routing interface configuration

Multicast routing VRF interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

This command was supported in multicast routing VRF interface configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The disable command modifies the behavior of a specific interface to disabled. This command is useful if you want to disable multicast routing on specific interfaces, but leave it enabled on all remaining interfaces.

The following guidelines apply when the enable and disable commands (and the no forms) are used in conjunction with the interface all enable command:

  • If the interface all enable command is configured:
    • The enable and no forms of the command have no additional effect on a specific interface.
    • The disable command disables multicast routing on a specific interface.
    • The no disable command enables a previously disabled interface.
  • If the interface all enable command is not configured:
    • The enable command enables multicast routing on a specific interface.
    • The no enable command enables the previously disabled interface.
    • The disable and no forms of the command have no additional effect on a specific interface.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable multicast routing on all interfaces and disable the feature only on GigabitEthernet interface 0/1/0/0:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# interface all enable
RP/0/RP0/CPU0:router(config-mcast-default-ipv4)# interface GigE 0/1/0/0
RP/0/RP0/CPU0:router(config-mcast-default-ipv4-if)# disable

Related Commands

Command

Description

enable (multicast)

Enables multicast routing and forwarding on an interface.  

interface all enable

Enables multicast routing and forwarding on all new and existing interfaces.  

enable (multicast)

To enable multicast routing and forwarding on an interface, use the enable command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

enable

no enable

Syntax Description

This command has no keywords or arguments.

Command Default

Multicast routing and forwarding settings are inherited from the global interface enable all command. Otherwise, multicast routing and forwarding is disabled.

Command Modes

Multicast routing interface configuration

Multicast routing VRF interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

This command was supported in multicast routing VRF interface configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The enable command modifies the behavior of a specific interface to enabled. This command is useful if you want to enable multicast routing on specific interfaces, but leave it disabled on all remaining interfaces.

The following guidelines apply when the enable and disable commands (and the no forms) are used in conjunction with the interface all enable command:

  • If the interface all enable command is configured:
    • The enable and no forms of the command have no additional effect on a specific interface.
    • The disable command disables multicast routing on a specific interface.
    • The no disable command enables a previously disabled interface.
  • If the interface all enable command is not configured:
    • The enable command enables multicast routing on a specific interface.
    • The no enable command enables a previously enabled interface.
    • The disable and no forms of the command have no additional effect on a specific interface.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable multicast routing on a specific interface only:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# interface GigE 0/1/0/0
RP/0/RP0/CPU0:router(config-mcast-default-ipv4-if)# enable

Related Commands

Command

Description

disable (multicast)

Disables multicast routing and forwarding on an interface.  

interface all enable

Enables multicast routing and forwarding on all new and existing interfaces.  

forwarding-latency

To delay traffic being forwarded on a route, use the forwarding-latency command. To return to the default behavior, use the no form of this command.

forwarding-latency [ delay milliseconds ]

no forwarding-latency

Syntax Description

delay milliseconds

(Optional) Specifies the delay time in miliseconds. Range is 5 - 500.

Command Default

The default delay time is 30 milliseconds.

Command Modes

Multicast routing configuration

IPv4 and IPv6 multicast routing configuration

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the forwarding-latency command when you expect a receiver to leave and rejoin the same multicast group within a very short period such as 20 or 30 milliseconds. The delay may be required to provide the router sufficient time to update its Multicast Forwarding Information Base (MFIB) table.

When the forwarding-latency command is enabled, each interface is allocated a separate table lookup unit (TLU) block in the output interface list (olist), thereby increasing TLU hardware resource usage, and, for this reason, it should be used with caution when many multicast routes are present.

When the forwarding-latency command is disabled, up to three interfaces may share a single TLU block in the olist.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to delay traffic from being forwarded for 120 milliseconds:

RP/0/RP0/CPU0:router# configure
RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router# forwarding-latency delay 120

interface (multicast)

To configure multicast interface properties, use the interface command in the appropriate configuration mode. To disable multicast routing for interfaces, use the no form of this command.

interface type interface-path-id

no interface type interface-path-id

Syntax Description

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Physical interface or virtual interface.

Note   

Use the show interfaces command in EXEC mode to see a list of all interfaces currently configured on the router.

For more information about the syntax for the router, use the question mark ( ? ) online help function.

Command Default

No default behavior or values

Command Modes

Multicast routing configuration

IPv4 or IPv6 multicast routing configuration

Multicast VRF configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the interface command to configure multicast routing properties for specific interfaces.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable multicast routing on all interfaces and disable the feature only on GigabitEthernet interface 0/1/0/0:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# interface all enable
RP/0/RP0/CPU0:router(config-mcast-default-ipv4-if)# interface GigE 0/1/0/0

RP/0/RP0/CPU0:router(config-mcast-default-ipv4-if)# disable

Related Commands

Command

Description

disable (multicast)

Disables multicast routing and forwarding on an interface.  

enable (multicast)

Enables multicast routing and forwarding on an interface.  

interface all enable

Enables multicast routing and forwarding on all new and existing interfaces.  

interface all enable

To enable multicast routing and forwarding on all new and existing interfaces, use the interface all enable command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

interface all enable

no interface all enable

Syntax Description

This command has no keywords or arguments.

Command Default

Multicast routing and forwarding is disabled by default.

Command Modes

Multicast routing configuration

Multicast VRF configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This command modifies the default behavior for all new and existing interfaces to enabled unless overridden by the enable or disable keywords available in interface configuration mode.

The following guidelines apply when the enable and disable commands (and the no forms) are used in conjunction with the interface all enable command:

  • If the interface all enable command is configured:
    • The enable and no forms of the command have no additional effect on a specific interface.
    • The disable command disables multicast routing on a specific interface.
    • The no disable command enables a previously disabled interface.
  • If the interface all enable command is not configured:
    • The enable command enables multicast routing on a specific interface.
    • The no enable command enables a previously enabled interface.
    • The disable and no forms of the command have no additional effect on a specific interface.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable multicast routing on all interfaces and disable the feature only on GigabitEthernet interface 0/1/0/0:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# interface all enable
RP/0/RP0/CPU0:router(config-mcast)# interface GigE 0/1/0/0
RP/0/RP0/CPU0:router(config-mcast-default-ipv4-if)# disable

Related Commands

Command

Description

disable (multicast)

Disables multicast routing and forwarding on an interface.  

enable (multicast)

Enables multicast routing and forwarding on an interface.  

interface-inheritance disable

To separate PIM and IGMP routing from multicast forwarding on all interfaces, use the interface-inheritance disable command under multicast routing address-family IPv4 or IPv6 submode. To restore the default functionality, use the no form of the command.

interface-inheritance disable

no interface-inheritance disable

Syntax Description

This command has no keywords or arguments.

Command Default

This feature is not enabled by default.

Command Modes

Multicast routing configuration

Address- family IPv4 or IPv6 configuration

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use of the interface-inheritance disable command together with the interface type interface-path-id or interface all enable command under multicast routing address-family IPv4 or IPv6 submode separates PIM and IGMP routing functionality from multicast forwarding on specified interfaces. You can nonetheless enable multicast routing functionality explicitly under PIM or IGMP routing configuration mode for individual interfaces.


Note


Although you can explicitly configure multicast routing functionality on individual interfaces, you cannot explicitly disable the functionality. You can only disable the functionality on all interfaces.


Used from the address-family ipv4 configuration submode, it prevents IGMP and PIM from inheriting the multicast-routing interface configuration. Whereas, if used from the address-family ipv6 confguration submode, it prevents MLD and PIM IPv6 from inheriting the multicast-routing interface configuration.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following configuration disables PIM and IGMP routing functionality on all the interfaces using the interface-inheritance disable command, but multicast forwarding is still enabled on all the interfaces in the example, based on use of the keywords interface all enable .

PIM is enabled on Loopback 0 based on its explicit configuration ( interface Loopback0 enable ) under router pim configuration mode.

IGMP protocol is enabled on GigabitEthernet0/6/0/3, because it too has been configured explicitly under router igmp configuration mode ( interface GigabitEthernet0/6/0/3 router enable ):

RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# address-family ipv4 
RP/0/RP0/CPU0:router(config-mcast-default-ipv4)# interface-inheritance disable 
RP/0/RP0/CPU0:router(config-mcast-default-ipv4)# interface loopback 1 enable 

RP/0/RP0/CPU0:router(config-mcast-default-ipv4)# show run router pim 

With the interface-inheritance disable command in use, IGMP, or MLD, and PIM configuration are enabled in the protocol configuration as follows:

router igmp
  interface loopback 0
    router enable

router pim
   interface loopback 0
     enable

router pim vrf default address-family ipv4
 interface Loopback0
  enable
 

RP/0/RP0/CPU0:router(config-mcast-default-ipv4)# show run router igmp 

router igmp
 vrf default
  interface GigabitEthernet0/6/0/3
   router enable

log-traps

To enable logging of trap events, use the log-traps command in the appropriate configuration mode. To remove this functionality, use the no form of this command.

log-traps

no log-traps

Syntax Description

This command has no keywords or arguments.

Command Default

This command is disabled by default.

Command Modes

Multicast routing configuration

Multicast routing address family IPv4 and IPv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable logging of trap events:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# log-traps 

maximum disable

To disable maximum state limits, use the maximum disable command in the appropriate configuration mode. To remove this functionality, use the no form of this command.

maximum disable

no maximum disable

Syntax Description

This command has no keywords or arguments.

Command Default

Maximum state limits are enabled.

Command Modes

Multicast routing configuration

Multicast routing address family IPv4 and IPv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the maximum disable command to override the default software limit on the number of multicast routes.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to disable maximum state limits:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# maximum disable 

mdt data

To configure multicast data to be part of a multicast distribution tree (MDT) data group for multicast VPN (MVPN), use the mdt data command in the appropriate configuration mode. To remove this functionality, use the no form of this command.

mdt data mdt-group-address /mask [ threshold threshold-value ] [acl-name]

no mdt data mdt-group-address /prefix-length [ threshold threshold-value ] [acl-name]

Syntax Description

mdt-group-address

IP address of the MDT group.

/ mask

A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). A slash must precede the decimal value.

threshold threshold

Specifies the traffic rate threshold to trigger data MDT. Range is 1 to 4294967295.

acl-name

Access list (ACL) for the customer’s VRF groups allowed to perform data MDT.

Command Default

threshold : 1

Command Modes

Multicast routing configuration

Multicast routing address family IPv4 and IPv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.7.0

Additional keyword information was added to the command.

The bottom of the threshold value range was increased by 1.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

When certain multicast streams exceed a configured bandwidth, the multicast data is moved to an MDT data group that is dynamically chosen from an available pool of multicast addresses. If the traffic bandwidth falls below the threshold, the source is switched back to the default MDT. To avoid transitions between the MDTs, traffic only reverts to the default MDT if traffic below the data MDT threshold is at least one minute old.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to configure the data MDT group:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# mdt data 172.23.2.2/24 threshold 1200 acl_A 

The following example shows how to configure the data MDT group from the multicast VRF submode:

RP/0/RP0/CPU0:router(config)# multicast-mcast)# maximum disablerouting 
RP/0/RP0/CPU0:router(config-mcast)# vrf vrf-name mdt data 172.23.2.2/24 

Related Commands

Command

Description

mdt default

Configures the default group address of the multicast VPN (MVPN) multicast distribution tree (MDT).  

mdt mtu

Configures the maximum transmission unit (MTU) configuration of the multicast VPN (MVPN) multicast distribution tree (MDT).  

mdt source

Configures the interface used to set the multicast VPN (MVPN) data multicast distribution tree (MDT) source address.  

mdt default

To configure the default group address of the multicast VPN (MVPN) multicast distribution tree (MDT), use the mdt default command in the appropriate configuration mode. To remove this functionality, use the no form of this command.

mdt default { mdt-default-group-address | ipv4 mdt-default-address }

no mdt default { mdt-default-group-address | ipv4 mdt-default-address }

Syntax Description

mdt-default-group-address

IP address of the MDT default group entered in A.B.C.D. format.

ipv4

Specifies IPv4-encapsulated MDT.

mdt-default-address

MDT IPv4 default address entered in A.B.C.D. format

Command Default

The MDT default group address must be unique.

Command Modes

Multicast routing configuration

Multicast routing address family IPv4 and IPv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.7.0

Additional keyword information was added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The default MDT has a unique group address used to create MVPN multicast tunnel interfaces.

Although within the multicast VRF configuration submode, the MDT configuration uses either the ipv4 or ipv6 keyword to distinguish the appropriate multicast VPN, the MDT core tree is IPv4.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to configure the MDT default group address from multicast routing configuration mode:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# mdt default 
172.16.10.1 

The following example shows how to configure the MDT default group address from multicast VRF configuration submode for an IPv6 address family:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# vrf vrf-name address-family ipv6 
RP/0/RP0/CPU0:router(config-mcast-vrf-name-ipv6)#mdt default 172.16.10.1

Related Commands

Command

Description

mdt data

Configures multicast data to be part of a multicast distribution tree (MDT) data group for multicast VPN (MVPN).  

mdt mtu

Configures the maximum transmission unit (MTU) configuration of the multicast VPN (MVPN) multicast distribution tree (MDT).  

mdt source

Configures the interface used to set the multicast VPN (MVPN) data multicast distribution tree (MDT) source address.  

mdt mtu

To configure the maximum transmission unit (MTU) configuration of the multicast VPN (MVPN) multicast distribution tree (MDT), use the mdt mtu command in multicast VPN configuration mode. To remove this functionality, use the no form of this command.

mdt mtu value

no mdt mtu value

Syntax Description

value

Specifies the MTU value and ranges between 401 to 65535. The configured mdt mtu value includes 24 bytes of GRE encapsulation.

Command Default

The MDT tunnel default size is 1376.

Command Modes

Multicast VRF configuration

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to configure the MTU of the multicast distribution tree:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# vrf vrf_A 
RP/0/RP0/CPU0:router(config-mcast-vrf_A-ipv4)# mdt mtu 2345 

Related Commands

Command

Description

mdt data

Configures multicast data to be part of a multicast distribution tree (MDT) data group for multicast VPN (MVPN).  

mdt default

Configures the default group address of the multicast VPN (MVPN) multicast distribution tree (MDT).  

mdt source

Configures the interface used to set the multicast VPN (MVPN) data multicast distribution tree (MDT) source address.  

mdt source

To configure the interface used to set the multicast VPN (MVPN) data multicast distribution tree (MDT) source address, use the mdt source command in the appropriate configuration mode. To remove this functionality, use the no form of this command.

mdt source type interface-path-id

no mdt source type interface-path-id

Syntax Description

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Physical interface or virtual interface.

Note   

Use the show interfaces command to see a list of all interfaces currently configured on the router.

For more information about the syntax for the router, use the question mark ( ? ) online help function.

Command Default

No default behavior or values

Command Modes

Multicast routing configuration

Multicast routing address family IPv4 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.9.0

Per VRF MDT source feature was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the mdt source command to identify the root of the multicast distribution tree in the service provider network. This address is used to update all MVPN peers through multiprotocol BGP.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to configure the interface used to set the MDT source address:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# mdt source POS 0/1/0/0 

Note


Per VRF MDT Source is a new feature introduced in IOS XR Software Release 3.9.0 apart from the existing default MDT source. Each VRF can have its own MDT source interface co-existing with the default MDT source to achieve core diversity.


The following example shows how to configure a per VRF MDT source:

RP/0/RP0/CPU0:router# configure 
RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# address-family ipv4 
RP/0/RP0/CPU0:router(config-mcast-default-ipv4)# mdt source loopback0 
RP/0/RP0/CPU0:router(config-mcast)# vrf foo 
RP/0/RP0/CPU0:router(config-mcast-foo)# address-family ipv4 
RP/0/RP0/CPU0:router(config-mcast-foo-ipv4)# mdt source loopback1 ! 

Related Commands

Command

Description

mdt data

Configures multicast data to be part of a multicast distribution tree (MDT) data group for multicast VPN (MVPN).  

mdt default

Configures the default group address of the multicast VPN (MVPN) multicast distribution tree (MDT).  

mdt mtu

Configures the maximum transmission unit (MTU) configuration of the multicast VPN (MVPN) multicast distribution tree (MDT).  

mhost default-interface

To configure the default interface for IP multicast transmission and reception to and from the host stack, use the mhost default-interface command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

mhost { ipv4 | ipv6 } default-interface type interface-path-id

no mhost { ipv4 | ipv6 } default-interface type interface-path-id

Syntax Description

ipv4

Specifies IPv4 address prefixes.

ipv6

Specifies IPv6 address prefixes.

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Physical interface or virtual interface.

Note   

Use the show interfaces command in EXEC mode to see a list of all interfaces currently configured on the router.

For more information about the syntax for the router, use the question mark ( ? ) online help function.

Command Default

If no Multicast Host (MHost) default interface is configured, an arbitrary interface is selected as the active MHost default.

If multicast routing feature is enabled, a multicast-enabled interface is always selected as the MHost default interface.

Command Modes

Global configuration

Global VRF configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

This command was supported in global VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The mhost default-interface command configures the interface that the automatic route processing (Auto-RP), ping, and mtrace applications use for multicast transmissions, and the interface to which multicast groups are joined for reception.

Auto-RP, ping, and mtrace may use the MHost default interface to process multicast messaging. When IP multicast routing is enabled, packets sent to the MHost default interface are switched on other interfaces with a matching forwarding state. In addition, an arbitrary interface may be chosen to be the active MHost default interface if the configured interface is not operational. If no MHost default interface is configured with this command, an arbitrary interface is selected as the active MHost default.


Note


  • The MHost default interface must be configured explicitly (preferably use a loopback interface).
  • If the MHost default interface is not configured explicitly, then the router picks an interface.
  • If the router picked multicast interface happens to be an ASBR link (on an ASBR router) and if that interface is configured with multicast boundary, then it may not work as intended beacuse there is an IC (Internal Copy) flag on the interface and it has to accept all multicast packets on the interface.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to configure Loopback interface 1 as the default interface:

RP/0/RP0/CPU0:router(config)# mhost ipv4 default-interface loopback 1 

Related Commands

Command

Description

show mhost default-interface

Displays the active default interface for the Multicast Host (MHost) process.  

multicast-routing

To enter multicast routing configuration mode, use the multicast-routing command in global configuration mode. To return to the default behavior, use the no form of this command.

multicast-routing

no multicast-routing

Syntax Description

This command has no keywords or arguments.

Command Default

No default behavior or values.

Command Modes

Global configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enter multicast routing configuration mode:

RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# 

Related Commands

Command

Description

accounting per-prefix

Enables per-prefix counters only in hardware.

alias

Creates a command alias.

interface (multicast)

Configures multicast interface properties.

interface all enable

Enables multicast routing and forwarding on all new and existing interfaces.

multipath

To enable Protocol Independent Multicast (PIM) to divide the multicast load among several equal cost paths, use the multipath command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

[ address-family ipv4 ] multipath [ hash { source | source next-hop } ]

[ address-family ipv6 ] multipath [ hash { interface-extended | source next-hop } ]

no multipath

Syntax Description

hash

(Optional) Enables multipath hashing.

interface-extended

(Optional) Enables extensions for non-unique next-hop addresses.

Note   

This option is available for IPv6 addressing in IPv6 multicast routing configuration mode and IPv6 multicast VRF configuration mode only.

source

Enables source-based multipath hashing.

source-nexthop

(Optional) Enables source with next-hop hashing.

Note   

This option is available only for IPv6 addressing.

source-specific-hash

(Optional) Enables multipath hashing for the source only.

Note   

This option is available only for IPv6 addressing.

Command Default

This command is disabled by default.

Command Modes

Multicast routing configuration

Multicast routing address-family ipv4 and ipv6 configuration
        

Multicast VRF configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

By default, equal-cost multipath (ECMP) paths are not load balanced. A single path from each unicast route is used for all multicast routes (which is the equivalent of the no form of the multipath command).

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable multipath functionality:

RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# multipath hash 

nsf (multicast)

To turn on the nonstop forwarding (NSF) capability for the multicast routing system, use the nsf command in multicast routing configuration mode. To turn off this function, use the no form of this command.

nsf [ lifetime seconds ]

no nsf [lifetime]

Syntax Description

lifetime seconds

(Optional) Specifies the maximum time (in seconds) for NSF mode. Range is 30 to 3600.

Command Default

This command is disabled by default.

Command Modes

Multicast routing configuration

Multicast routing address family ipv4 and ipv6 configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.2

The enable and disable keywords.

Release 3.5.0

The lifetime lifetime keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The nsf command does not enable or disable the multicast routing system, but just the NSF capability for all the relevant components. When the no form of this command is used, the NSF configuration is returned to its default disabled state.

Enable multicast NSF when you require enhanced availability of multicast forwarding. When enabled, failures of the control-plane multicast routing components Multicast Routing Information Base (MRIB) or Protocol Independent Multicast (PIM) will not cause multicast forwarding to stop. When these components fail or communication with the control plane is otherwise disrupted, existing Multicast Forwarding Information Base (MFIB) entries continue to forward packets until either the control plane recovers or the MFIB NSF timeout expires.

Enable multicast NSF when you upgrade control-plane Cisco IOS XR Software packages so that the live upgrade process does not interrupt forwarding.

When the MFIB partner processes enter NSF mode, forwarding on stale (nonupdated) MFIB entries continues as the control-plane components attempt to recover gracefully. Successful NSF recovery is signaled to the Multicast Forwarding Engine (MFWD) partner processes by MRIB. MRIB remains in NSF mode until Internet Group Management Protocol (IGMP) has recovered state from the network and host stack and until PIM has recovered state from the network and IGMP. When both PIM and IGMP have recovered and fully updated the MRIB, MRIB signals the MFIBs that NSF is ending, and begins updating the stale MFIB entries. When all updates have been sent, the MFWD partner processes delete all remaining stale MFIB entries and returns to normal operation, ending the NSF mode. MFIB NSF timeout prior to the signal from MRIB may cause NSF to end, and thus forwarding to stop.

When forwarding is in NSF mode, multicast flows may continue longer than necessary when network conditions change due to multicast routing protocols, unicast routing protocol reachability information, or local sender and receiver changes. The MFWD partner processes halt forwarding on stale MFIB entries when the potential for a multicast loop is detected by receipt of incoming data on a forwarding interface for the matching MFIB entry.


Note


For NSF to operate successfully in your multicast network, you must also enable NSF for the unicast protocols (such as Intermediate System-to-Intermediate System [IS-IS], Open Shortest Path First [OSPF] and Border Gateway Protocol [BGP]) that PIM relies on for Reverse Path Forwarding (RPF) information. See the appropriate configuration modules to learn how to configure NSF for unicast protocols.


Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable NSF for the multicast routing system:

RP/0/RP0/CPU0:router(config)# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# nsf 

Related Commands

Command

Description

nsf lifetime (IGMP/MLD)

Configures the maximum time for the NSF timeout value under IGMP or MLD.

nsf lifetime (PIM)

Configures the NSF timeout value for the PIM process.

show igmp nsf

Displays the state of NSF operation in IGMP.

show mfib nsf

Displays the state of NSF operation for the MFIB line cards.

show mrib nsf

Displays the state of NSF operation in the MRIB.

show pim nsf

Displays the state of NSF operation for PIM.

oom-handling

To enable the out-of-memory (OOM) functionality on multicast routing software components, use the oom-handling command in multicast routing configuration mode. To remove this functionality, use the no form of this command.

oom-handling

no oom-handling

Syntax Description

This command has no keywords or arguments.

Command Default

This command is disabled by default.

Command Modes

Multicast routing configuration

Multicast routing address family ipv4 configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

When the oom-handling command is enabled, and the router memory is low or in a warning state, the following states are not created:

  • Protocol Independent Multicast (PIM) route states in response to PIM join and prune messages, and register messages
  • Internet Group Management Protocol (IGMP) group states
  • External Source-Active (SA) states in Multicast Source Discovery Protocol (MSDP)

Multicast routing show commands such as the show pim topology command indicate when the router is running low on memory and that new state creation has stopped.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable the out-of-memory functionality:

RP/0/RP0/CPU0:router# multicast-routing 
RP/0/RP0/CPU0:router(config-mcast)# oom-handling 

Related Commands

Command

Description

show pim topology

Displays PIM topology table information.

rate-per-route

To enable individual (source, group [S, G]) rate calculations, use the rate-per-route command in the appropriate configuration mode. To remove this functionality, use the no form of this command.

rate-per-route

no rate-per-route

Syntax Description

This command has no keywords or arguments.

Command Default

This command is disabled by default.

Command Modes

Multicast routing configuration

Multicast routing address family ipv4 and ipv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to enable individual route calculations:

RP/0/RP0/CPU0:router# multicast-routing vrf vpn12 address-family ipv4 
RP/0/RP0/CPU0:router(config-mcast)# rate-per-route 

Related Commands

Command

Description

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mfib connections

To display the status of Multicast Forwarding Information Base (MFIB) connections to servers, use the show mfib connections command in EXEC mode.

show mfib [ ipv4 | ipv6 ] connections [ location node-id ]

Syntax Description

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

(Optional) Specifies MFIB connections associated with an interface of the designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the show mfib connections command to display a list of servers connected to the MFIB and the status of the connections.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib connections command:

RP/0/RP0/CPU0:router# show mfib connections 

Netio            : connected
IM               : connected
Pakman           : connected
MRIB             : connected
IFH              : connected
SysDB-Global     : connected
SysDB-Local      : connected
SysDB-NSF        : connected
SYSDB-EDM        : connected
SYSDB-Action     : connected
AIB              : connected
MLIB             : connected
IDB              : connected
IIR              : connected
IPARM            : connected
GSP              : connected

Related Commands

Command

Description

show mfib interface

Displays interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mfib counter

To display Multicast Forwarding Information Base (MFIB) counter statistics for packets that have dropped, use the show mfib counter command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] counter [ location node-id ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

(Optional) Specifies MFIB counter statistics associated with an interface of the designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show mfib counter command displays packet drop statistics for packets that cannot be accounted for under route counters.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib counter command:

RP/0/RP0/CPU0:router# show mfib counter location 0/1/CPU0 

MFIB global counters are : 
* Packets [no input idb]                   : 0
* Packets [failed route lookup]            : 0
* Packets [Failed idb lookup]              : 0
* Packets [Mcast disabled on input I/F]    : 0
* Packets [encap drops due to ratelimit]   : 0
* Packets [MC disabled on input I/F (iarm nfn)]      : 0

This table describes the significant fields shown in the display.



Table 1 show mfib counter Field Descriptions

Field

Description

Packets [no input idb]

Packets dropped because no input interface information was found in the packet.

Packets [failed route lookup]

Packets dropped because of failure to match any multicast route.

Packets [Failed idb lookup]

Packets dropped because the descriptor block was not found for an interface (incoming or outgoing).

Packets [Mcast disabled on input I/F]

Packets dropped because arriving on an interface that was not enabled for the multicast routing feature.

Packets [encap drops due to ratelimit]

Packets dropped because of rate limit.

Related Commands

Command

Description

show mfib interface

Displays interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mfib encap-info

To display the status of encapsulation information for Multicast Forwarding Information Base (MFIB), use the show mfib encap-info command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] encap-info [ location node-id ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

(Optional) Specifies MFIB connections associated with an interface of the designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This feature is useful for Multicast VPN network implementations.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib encap-info command:

RP/0/RP0/CPU0:router# show mfib vrf vrf_a encap-info 

                 ----------------------------
Encaps String                       Dependent  Encaps      MDT Name/
                                    Routes #   Table ID    Handle

(192.168.5.203, 255.1.1.1)            5          0xe0000000  mdtA1 (0x100a480)

Related Commands

Command

Description

show mfib interface

Displays interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mfib hardware interface

To display hardware switching interface information for the Multicast Forwarding Information Base (MFIB) process, use the show mfib hardware interface command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware interface [detail] [ type interface-path-id ] [ location node-id ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

detail

(Optional) Displays detailed information about the MFIB interface.

type

(Optional) Interface type. For more information, use the question mark (?) online help function.

interface-path-id

(Optional) Physical interface or virtual interface.

Note   

Use the show interfaces command to see a list of all interfaces currently configured on the router.

For more information about the syntax for the router, use the question mark (?) online help function.

location node-id

(Optional) Specifies an MFIB-designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.2

The ipv4 and ipv6 keywords were added.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Release 3.8.0

New fields were added to the output to show potential memory leakage or increased resource use.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show mfib hardware interface command displays multicast-specific information about the software switching interfaces of the router hardware. This command will not display any useful output if only RSP is specified or if no location is specified.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib hardware interface command. The first line displays information for the fabric interface (FI0/1/1) on the line card. The fabric interface is a special interface that represents the hardware connection to the fabric.

RP/0/RP0/CPU0:router# show mfib ipv4 hardware interface location 0/1/cpu0

LC Type: Trident
Interface Handle Ghandle RefCnt TTL uIDB E-uIDB Parent-I/F Enbld Comment 
BP1 0x800d0 0x0 3 0 (Bundle, no local members) success 
BP2 0x800f0 0x0 3 0 (Bundle, no local members) success 
FI0/1/CPU0 0x1180020 0x0 2 0 0 Unknwn Unknown False success 
Te0/1/0/0 0x1180040 0x118004 3 0 1 1 N/A True success 
Te0/1/0/1 0x1180060 0x118006 2 0 3 3 N/A True success 

This table describes the significant fields shown in the display.



Table 2 show mfib hardware interface Field Descriptions

Field

Description

Interface

MFIB interface name.

Handle

A 32-bit system-wide identifier of the MFIB interface.

Ghandle

Global interface handle. A 28-bit system-wide identifier of the interface derived from the 32-bit handle, but does not exist for all MFIB interfaces.

RefCnt

Number of times various data structures referred to this MFIB interface structure.

TTL

Multicast time-to-live threshold that was configured on this MFIB interface.

uIDB

MicroIDB. A unique identifier of the MFIB interface that exists on the line card.

E-uIDB

An identifier that is relevant only for virtual MFIB interfaces such as bundles and tunnels. For example, if an interface is a member of a bundle, the effective uIDB is that of the bundle.

Parent-I/F

Parent interface handle. Relevant only for bundles and tunnels showing the corresponding parent MFIB interface handle.

Enbld

If true, multicast is enabled on the MFIB interface.

Primary IP

Primary IP address of the MFIB interface.

Secondary IP

Secondary IP address of the MFIB interface.

Bound-ACL

The following states appear for this field:

  • True if the multicast boundary is configured on the MFIB interface.
  • False if no boundary is configured.
  • Unknown if the MFIB interface is not applicable to multicast boundaries.

ADJ ADDR

Table lookup unit (TLU) memory location of the MFIB interface adjacency information.

Comment

Indicates whether there were problems when reading hardware information.

Related Commands

Command

Description

show mfib interface

Displays interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process.  

show mfib hardware resource-counters

To display the allocated and freed hardware resources for the Multicast Forwarding Information Base (MFIB) process, use the show mfib hardware resource-counters command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware resource-counters location node-id

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

Specifies an MFIB-designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the show mfib hardware resource-counters command to understand the table lookup unit (TLU) resource usage by MFIB. The output shows the following:

  • Usage for each channel
  • Storing of specific data
  • Allocation counts for metro statistics
  • Failure counts for metro statistics

Note


Use the location option in the show mfib hardware resource-counters command to indicate for which linecard you need information. The command will not display any useful output if only RSP is specified or if no location is specified.


Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib hardware resource-counters command:

RP/0/RP0/CPU0:router# show mfib ipv4 hardware resource-counters location 0/1/cpu0 

LC Type: Trident
TLU blocks channel 0 : ingress: 0,0      egress: 1,0 
TLU blocks channel 1 : ingress: 0,0      egress: 0,0 
TLU blocks channel 2 : ingress: 80329,80283      egress: 48041,48007 
TLU blocks channel 3 : ingress: 202582,202576    egress: 48042,48007 
TLU blocks for PLU_EXTENSION: 80329,80283
TLU blocks for S_BITMAP: 202582,202576
TLU blocks for USE_ACCEPT_BITMAP: 0,0
TLU blocks for CONN_CHECK: 0,0
TLU blocks for OLIST: 96083,96014
TLU blocks for L2_LOAD_INFO: 1,0
TLU blocks for L2_TE: 0,0
TLU blocks for OLIST1: 0,0
TLU blocks for OLIST2: 0,0
TLU blocks for ING_VPN_IPV4_ENCAP: 0,0
TLU blocks for EG_ACCEPT_BITMAP: 0,0
TLU blocks for P2MP_ENCAP: 0,0
TLU blocks for UNKNOWN: 0,0
Number of times having TLU block(s) allocation failures: 0
Number of times having TLU block(s) free failures: 0
Mstat success #calls: ingress: 3,0       egress: 2,0 
Mstat failure #calls: ingress: 0,0       egress: 0,0 

-- Shared Memory counters:
[table_ext] Alloc:      1 [          20 bytes]  Free:      0 [           0 byte]
[route_ext] Alloc:  80329 [    29882388 bytes]  Free:  80283 [    29865276 byte]
[intf_ext]  Alloc: 857102 [    47997712 bytes]  Free: 856905 [    47986680 byte]
[idb_ext]   Alloc:     27 [        2916 bytes]  Free:      7 [         756 byte]
[Encap_Info]Alloc:      0 [           0 bytes]  Free:      0 [           0 byte]
[TLU_Handle]Alloc: 277704 [    15551424 bytes]  Free: 277585 [    15544760 byte]

This table describes the significant fields shown in the display.



Table 3 show mfib hardware resource counters Field Descriptions

Field

Description

TLU blocks channel n : ingress: n egress: n

TLU blocks allocated on ingress and egress for each channel.

TLU blocks for PLU_EXTENSION

Resource use for storing extended data (in addition to the PLU lookup result).

TLU blocks for S_BITMAP

Resource use for storing a bitmap to indicate which interfaces have signaling turned on for this route.

TLU blocks for USE_ACCEPT_BITMAP

Resource use for bidirectional routes to indicate which interfaces can accept packets for this route.

TLU blocks for CONN_CHECK

Resource use for data type CONN_CHECK.

TLU blocks for OLIST

Resource use for data type OLIST.

TLU blocks for L2_LOAD_INFO

Resource use for data type L2_LOAD_INFO.

Related Commands

Command

Description

clear mfib hardware adjacency-counters

Clears the platform-specific information related to resource counters for the Multicast Forwarding Information Base.  

show mfib interface

Displays interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process.  

show mfib hardware route accept-bitmap

To display platform-specific Multicast Forwarding Information Base (MFIB) information for the interface list that accepts bidirectional routes, use the show mfib hardware route accept-bitmap command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware route accept-bitmap [*] [source-address] [ group-address [ /prefix-length ] ] [detail] [ location node-id ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

 

(Optional) Displays shared tree entry.

source-address

(Optional) IP address or hostname of the multicast route source:

group-address

(Optional) IP address or hostname of the multicast group.

/ prefix-length

(Optional) Prefix length of the multicast group. A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). A slash must precede the decimal value.

detail

(Optional) Detailed list of the routing database.

location node-id

(Optional) Specifies an MFIB-designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.2

The ipv4 and ipv6 keywords were added.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.


Note


The command does not display any useful output if only RSP is specified or if no location is specified.


Task ID

Task ID

Operations

multicast

read

Examples

In the following example, the bidirectional range is configured as 233.1.0.0/16 and 233.4.0.0/16:

RP/0/RP0/CPU0:router(config)# ipv4 access-list bidir-range
RP/0/RP0/CPU0:router(config-ipv4-acl)# permit 233.1.0.0 0.0.255.255
RP/0/RP0/CPU0:router(config-ipv4-acl)# permit 233.4.0.0 0.0.255.255
RP/0/RP0/CPU0:router(config-ipv4-acl)# deny any
RP/0/RP0/CPU0:router(config-ipv4-acl)# commit
RP/0/RP0/CPU0:router(config-ipv4-acl)# exit

RP/0/RP0/CPU0:router(config)# router pim
RP/0/RP0/CPU0:router(config-pim-default-ipv4)# no rp-address 10.1.1.1 bidir
RP/0/RP0/CPU0:router(config-pim-default-ipv4)# commit
RP/0/RP0/CPU0:router(config-pim-default-ipv4)# rp-address 10.1.1.1 bidir-range bidir 
RP/0/RP0/CPU0:router(config-pim-default-ipv4)# commit

The sample output from the show mfib hardware route accept-bitmap command displays the accepting interface list for (*,233.1.0.0/16) and (*,233.4.0.0/16) only. The accepting interface list is POS0/1/1/0, POS0/1/1/1, and POS0/1/1/3.

RP/0/RP0/CPU0:router# show mfib hardware route accept-bitmap detail location 0/1/CPU0

LC Type: Trident
Source: Source address                   Group: Group Address    M: Mask Length
iQoS  : Ingress QoS tag                  C    : Directly connected check flag
RPF   : Accepting interface for non-bidir entries
S     : Signal on RPF interface          FU   : For us
PLUext: PLU result extension address 
FGID  : Fabric Group ID  
oQoS  : Output QoS tag
FGID2 : Secondary Fabric Group ID  
A_num    : Number of I/Fs in the accepting list   
A_TLU    : Address of the first TLU in the accepting list   
Interface: Accepting interface name
Source Group    M  iQoS C RPF  S FU PLUext  FGID  FGID2 P PF BA oQoS A_num A_TLU Interface
*   224.0.0.0   4  0    T Null F F  200ae2c 41785 -1    F F  T   0    0    Null    
*   224.0.0.0   24 0    F Null F F  200d00f 47206 -1    F F  T   0    0    Null    
*   224.0.1.39  32 0    F Null F F  200d000 47205 -1    T F  F   0    0    Null    
*   224.0.1.40  32 0    F Null F F  200d00d 27202 -1    T F  F   0    0    Null    
*   232.0.0.0   8  0    F Null F F  200d010 47207 -1    F F  T   0    0    Null    
*   233.1.0.0   16 0    F Null F F  200ae34 44106 -1    F F  T   0    3    4400  PO0/1/1/0
*   233.1.0.0   16 0    F Null F F  200ae34 44106 -1    F F  T   0    3    4400  PO0/1/1/1
*   233.1.0.0   16 0    F Null F F  200ae34 44106 -1    F F  T   0    3    4400  PO0/1/1/3
*   233.1.1.1   32 0    F Null F F  200a418 27205 -1    F F  T   0    0    4400    
*   233.1.1.2   32 0    F Null F F  200a419 27206 -1    F F  T   0    0    4400    
*   233.1.1.3   32 0    F Null F F  200a41c 27207 -1    F F  T   0    0    4400    
*   233.1.1.4   32 0    F Null F F  200a41d 27208 -1    F F  T   0    0    4400    
*   233.4.0.0   16 0    F Null F F  200ae3c 42043 -1    F F  T   0    3    4500  PO0/1/1/0 
*  233.4.0.0    16 0    F Null F F  200ae3c 42043 -1    F F  T   0    3    4500  PO0/1/1/3 

RP/0/RP0/CPU0:router# show mfib hardware route accept-bitmap detail location 0/0/CPU0 

LC Type: Trident
Source: Source address   Group: Group Address    M: Mask Length
        iQoS  : Ingress QoS tag                  C    : Directly connected check flag
        RPF   : Accepting interface for non-bidir entries
        S     : Signal on RPF interface          FU   : For us
        FGID  : Fabric Group ID
        oQoS  : Output QoS tag
        FGID2 : Secondary Fabric Group ID
        A_num    : Number of I/Fs in the accepting list
Interface: Accepting interface name
Source          Group           M  
Source: *               Group: 224.0.0.0       Mask length: 24 
Source: *               Group: 224.0.1.39      Mask length: 32 
Source: *               Group: 224.0.1.40      Mask length: 32 
Source: *               Group: 227.0.0.1       Mask length: 32 
Source: 4.0.0.2         Group: 227.0.0.1       Mask length: 64 
Source: *               Group: 230.0.0.0       Mask length: 8  
Source: *               Group: 232.0.0.0       Mask length: 8  

This table describes the significant fields shown in the display.



Table 4 show mfib hardware route accept-bitmap Field Descriptions

Field

Description

iQoS

An identifier of a quality-of-service (QoS) policy. This field is currently unused.

C

Directly connected check flag. If “T” is displayed, hardware performs directly connected checks on the packet sources that match this route.

S

Signal on Reverse Path Forwarding (RPF) interface. If “T” is displayed, hardware punts the packet to the line card CPU to signal Protocol Independent Multicast (PIM) (by default) for all packets that match this route.

FU

For us. A packet is destined for this router. If “T” is displayed, at least one application is interested in packets on one or more interfaces that match this route.

P

Punt. If “T” is displayed, all packets that match the route punt to the line card CPU.

PF

Punt if forward. If “T” is displayed, when the ingress hardware sends a packet to the egress line cards across the fabric, it also punts a copy of the packet to the line card CPU.

BA

Boundary access list (ACL). If “T” is displayed, the hardware punts the packet to the line card CPU for software switching when the incoming interface has a boundary access list configured.

oQoS

Output QoS policy identifier. This field is currently unused.

A_num

Number of accepting interfaces for a bidirectional route.

Related Commands

Command

Description

show mfib interface

Displays interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process.  

show mfib hardware route olist

To display platform-specific Multicast Forwarding Information Base (MFIB) information in the output interface list (olist) stored in the hardware, use the show mfib hardware route olist command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware route olist { [*] | [source-address] [ group-address [ /prefix-length ] ] [detail] } [ location node-id ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

 

(Optional) Displays shared tree entries.

source-address

(Optional) IP address or hostname of the multicast route source.

group-address

(Optional) IP address or hostname of the multicast group.

/ prefix-length

(Optional) Prefix length of the multicast group. A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). A slash must precede the decimal value.

detail

(Optional) Displays a detailed list of the routing database. Requires 140 columns.

location node-id

Specifies an MFIB-designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show mfib hardware route olist command displays the output interface list (olist) for each route. The Multicast Forwarding (MFWD) process stores olist interfaces in a table lookup unit (TLU) block (in groups of three). As such, the command displays each route three times. The command does not display any useful output if only RSP is specified or if no location is specified.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib hardware route olist command for line card 0/1/CPU0 (the output fields are described in the header):

RP/0/RP0/CPU0:router# show mfib hardware route olist location 0/1/CPU0 

LC Type: Trident
Source: Source address                   
Group : Group Address    
M     : Mask Length
C     : Directly connected check flag
RPF   : Accepting interface for non-bidir entries
S     : Signal if packet arrived on RPF interface
FU    : For us
FGID  : Fabric Group ID  
P     : Route Punt
PF    : Punt to CPU if packet is forwarded to the fabric
BA    : Check if boundary ACL is configured on incoming interface
O_Null   : Olist is empty
Interface: Output interface name         
IC       : Internal copy flag
OP       : Output Punt: Punt instead of forwarding out
Source          Group           M  C RPF        S FU FGID   P PF BA O_Null Interface IC OP
   *            224.0.0.0       4  T Null       F F  41785  F F  T  True  
   *            224.0.0.0       24 F Null       F F  47206  F F  T  True  
   *            224.0.1.39      32 F Null       F F  47205  T F  F  True  
   *            224.0.1.40      32 F Null       F F  27202  T F  F  True  
   *            232.0.0.0       8  F Null       F F  47207  F F  T  True  
   *            233.1.0.0       16 F Null       F F  44106  F F  T  False NULL       
   *            233.1.0.0       16 F Null       F F  44106  F F  T  False NULL       
   *            233.1.0.0       16 F Null       F F  44106  F F  T  False PO0/1/1/0  F  F 
   *            233.1.1.1       32 F Null       F F  27205  F F  T  False NULL       
   *            233.1.1.1       32 F Null       F F  27205  F F  T  False PO0/1/1/1  F  F 
   *            233.1.1.1       32 F Null       F F  27205  F F  T  False PO0/1/1/0  F  F 
   *            233.1.1.2       32 F Null       F F  27206  F F  T  False NULL       
   *            233.1.1.2       32 F Null       F F  27206  F F  T  False PO0/1/1/1  F  F 
   *            233.1.1.2       32 F Null       F F  27206  F F  T  False PO0/1/1/0  F  F 

Related Commands

Command

Description

show mfib hardware route accept-bitmap

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the interface list that accepts bidirectional routes.  

show mfib hardware route statistics

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route.  

show mfib hardware route summary

Displays summary platform-specific Multicast Forwarding Information Base (MFIB) hardware information for each route entry.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mfib hardware route statistics

To display platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route, use the show mfib hardware route statistics command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware route statistics [detail] [*] [source-address] [ group-address [ /prefix-length ] ] [ location node-id ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

*

(Optional) Displays shared tree entries.

source-address

(Optional) IP address or hostname of the multicast route source.

group-address

(Optional) IP address or hostname of the multicast group.

/ prefix-length

(Optional) Prefix length of the multicast group. A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). A slash must precede the decimal value.

detail

(Optional) Displays a detailed list of the routing database.

location node-id

(Optional) Specifies an MFIB-designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the show mfib hardware route statistics command to display the hardware packet and byte counter for a route. Route counters are kept for (S, G) routes only. A single set of counters is provided for all

(*, G) routes.

This command displays the hardware packet and bytes count on a per-route basis. Per-route hardware counters are kept for (S, G) routes only. However, counters are managed dynamically and allocated on a priority basis and may not be available for each (S, G) route. There is a single set of counters for all

(*, G) routes. For example, interface counters and access list counters have higher priority than route counters.


Note


Route counters are local to each line card.


Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib hardware route statistics command for line card 0/1/CPU0.

The first four lines indicate that a total of 2709724 packets representing 184261232 bytes matched all (*, G) routes and were punted to line card CPU for further processing.

The second four lines indicate that 753 packets matched the route (10.1.1.9, 233.1.1.2), were accepted for forwarding, and were sent into the fabric by the ingress forwarding engine. The lines indicate that 749 packets and 47936 bytes were received by the egress forwarding engine from the fabric, matched (10.1.1.9, 233.1.1.2), and were sent out of at least one interface from the output interface list.

The command does not display any useful output if only RSP is specified or if no location is specified

RP/0/RP0/CPU0:router# show mfib hardware route statistics location 0/1/CPU0 

LC Type: Trident
(*,G) Counter: Ingress Counter = 0xe170  Egress Counter = 0x9110
Ingress: Forward = (0 , 0)                  Punt = (2709724 , 184261232)
         Drop    = (0 , 0)
Egress:  Forward = (0 , 0)                Drop = (0 , 0)
(10.1.1.9,233.1.1.1/64)  Ingress Counter = 0xe173  Egress Counter = 0x9112
Ingress: Forward = (753 , 51204)                  Punt = (0 , 0)
         Drop    = (0 , 0)
Egress:  Forward = (749 , 47936)                  Drop = (0 , 0)

This table describes the significant fields shown in the display.



Table 5 show mfib hardware route statistics Field Descriptions

Field

Description

Ingress Counter

Unique identifier of the ingress counter.

Egress Counter

Unique identifier of the egress counter.

Forward

Number of forwarded packets and bytes.

Punt

Number of bytes punted from the line card CPU.

Drop

Number of dropped bytes.

Related Commands

Command

Description

show mfib hardware route accept-bitmap

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the interface list that accepts bidirectional routes.  

show mfib hardware route olist

Displays platform-specific Multicast Forwarding Information Base (MFIB) information in the output interface list (olist) stored in the hardware.  

show mfib hardware route summary

Displays summary platform-specific Multicast Forwarding Information Base (MFIB) hardware information for each route entry.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mfib hardware route summary

To display summary platform-specific Multicast Forwarding Information Base (MFIB) hardware information for each route entry, use the show mfib hardware route summary command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] hardware route summary location node-id

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

(Optional) Specifies an MFIB-designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the show mfib hardware summary command to display hardware information for the route of the node.

The longest-prefix match route is displayed depending on the provided source and group addresses. The command does not display any useful output if only RSP is specified or if no location is specified.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib hardware route summary command:

RP/0/RP0/CPU0:router# show mfib hardware route summary location 0/1/cpu0	

LC Type: Trident
H/W IP Multicast Forwarding Information Base Summary
  No. of (*,G) routes = 5
  No. of (S,G) routes = 10 

RP/0/RSP0/CPU0:router# show mfib hardware route summary location 0/0/CPU0 

LC Type: Trident
H/W IP Multicast Forwarding Information Base Summary
  No. of (*,G) routes = 6
  No. of (S,G) routes = 5
  No. of (S,G) MoFRR routes = 0,   Maximum supported MoFRR routes = 1024

RP/0/RSP0/CPU0:router# show mfib hardware route summary location 0/4/cPU0 

LC Type: A9K-SIP-700
Hardware IP Multicast Forwarding Information Base Route Summary
Number of hardware (*, G) routes = 6
Number of hardware (S, G) routes = 1
Number of hardware route-interfaces = 4
Number of hardware Rx adjacencies = 7
Number of hardware Tx adjacencies = 3
Number of ref to decap adjacency  = 0
Mvpn master LC status             = False

This table describes the significant fields shown in the display.



Table 6 show mfib hardware route summary Field Descriptions

Field

Description

No. of (*,G) routes

Number of (*,G) routes installed in hardware.

No. of (S,G) routes

Number of (S,G) routes installed in hardware.

Maximum supported MoFRR routes

Maximum number of MoFRR routes supported in hardware.

Related Commands

Command

Description

show mfib hardware route accept-bitmap

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the interface list that accepts bidirectional routes.  

show mfib hardware route olist

Displays platform-specific Multicast Forwarding Information Base (MFIB) information in the output interface list (olist) stored in the hardware.  

show mfib hardware route statistics

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mfib interface

To display interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process, use the show mfib interface command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] interface [ type interface-path-id ] [ detail | route ] [ location node-id ]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

type

(Optional) Interface type. For more information, use the question mark (?) online help function.

interface-path-id

(Optional) Physical interface or virtual interface.

Note   

Use the show interfaces command in EXEC mode to see a list of all interfaces currently configured on the router.

For more information about the syntax for the router, use the question mark ( ? ) online help function.

detail

(Optional) Specifies detailed information for packet statistics on interfaces.

route

(Optional) Specifies a list of routes associated with the interface. This option is available if an interface type and instance are specified.

location node-id

(Optional) Specifies packet statistics associated with an interface of the designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show mfib interface command displays counters for the number of packets and bytes that are handled by software switching. Counters for packets processed by hardware are displayed by the appropriate show mfib hardware command.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib interface command for the multicast route on node 0/2/CPU0 that is associated with the Gigabit Ethernet interface 0/2/0/2:

RP/0/RP0/CPU0:router# show mfib interface GigE 0/2/0/2 location 0/2/CPU0 

Interface : GigE0/2/0/2 (Enabled)
Mcast pkts in : 5839, Mcast pkts out : 0 TTL Threshold : 0 Ref Count : 18

The following is sample output from the show mfib interface command with the detail and location keywords specified:

RP/0/RP0/CPU0:router# show mfib interface detail location 0/2/CPU0 

Interface : FINT0/2/CPU0 [0x3000000] (Disabled) PHYSICAL Create Unknown Mcast pkts in: 0, Mcast pkts out: 0 TTL Threshold : 0, VRF ID: 0x60000000, Multicast Adjacency Ref Count: 2, Route Count: 0, Handle: 0x3000000 Primary address : 0.0.0.0/32 Secondary address : 0.0.0.0/32 

Interface : GigE0/2/0/2 [0x3000900] (Enabled) PHYSICAL Create Rcvd Mcast pkts in: 5844, Mcast pkts out: 0 TTL Threshold : 0, VRF ID: 0x60000000, Multicast Adjacency Ref Count: 18, Route Count: 15, Handle: 0x3000900 Primary address : 112.112.112.203/24 Secondary address : 0.0.0.0/32 

This table describes the significant fields shown in the display.



Table 7 show mfib interface Field Descriptions

Field

Description

Interface

Interface name. Enabled if the interface is configured for multicast routing. The word “PHYSICAL” is displayed if the interface is a nonvirtual interface.

Mcast pkts in

Number of incoming multicast packets entering the interface during software switching.

Mcast pkts out

Number of outgoing multicast packets exiting the interface during software switching.

TTL Threshold

Number of multicast packets that reach the configured multicast time-to-live threshold.

VRF ID

VPN Routing and Forwarding instance ID.

Ref Count

Number of references to this interface structure in the MFIB process.

Primary address

Primary IP address of the interface.

Secondary address

Secondary IP address of the interface.

Related Commands

Command

Description

show mfib hardware interface

Displays hardware switching interface information for the Multicast Forwarding Information Base (MFIB) process.  

show mfib mdt statistics

To display information about mdt interface activity, use the show mfib mdt statistics command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] mdt statistics

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.6.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

RP/0/RP0/CPU0:router# show mfib vrf svpn1 mdt statistics 

MDT Interface Statistics
      Input Pkts      Input Bytes  Output Pkts     Output Bytes
          591548        591540546            0                0

show mfib nsf

To display the state of a nonstop forwarding (NSF) operation for the Multicast Forwarding Information Base (MFIB) line cards, use the show mfib nsf command in EXEC mode.

show mfib [ ipv4 | ipv6 ] nsf [ location node-id ]

Syntax Description

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

location node-id

(Optional) Specifies the MFIB NSF designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show mfib nsf command displays the current multicast NSF state for the MFIB process contained on all line cards and route processors (RPs) in the router.

For multicast NSF, the state may be one of the following:

  • Normal—Normal operation: The MFIBs in the card contain only up-to-date MFIB entries.
  • Boot Card Booting—Card is initializing and has not yet determined its NSF state.
  • Not Forwarding—Multicast Forwarding Disabled: Multicast routing failed to recover from a failure-induced NSF state prior to the MFIB NSF timeout.
  • Non-stop Forwarding Activated—Multicast NSF active: The router is operating in NSF mode while attempting to recover from a control-plane failure. In this mode, data is forwarded based on MFIB entries that are either updated by the recovered Multicast Routing Information Base (MRIB), or MFIB entries that were marked stale when NSF mode began. The times remaining until multicast NSF and multicast-unicast NSF expiration are displayed.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib nsf command:

RP/0/RP0/CPU0:router# show mfib nsf 

IP MFWD Non-Stop Forwarding Status:
  NSF Lifetime: 00:15:00

On node 0/1/CPU0 :
Multicast routing state: Non-Stop Forwarding is activated
NSF Time Remaining: 00:14:54

On node 0/3/CPU0 :
Multicast routing state: Non-Stop Forwarding is activated
NSF Time Remaining: 00:14:54

On node 0/4/CPU0 :
Multicast routing state: Non-Stop Forwarding is activated
NSF Time Remaining: 00:14:53

On node 0/6/CPU0 :
Multicast routing state: Non-Stop Forwarding is activated
NSF Time Remaining: 00:14:53

This table describes the significant fields shown in the display.



Table 8 show mfib nsf Field Descriptions

Field

Description

IP MFWD Non-Stop Forwarding Status

MFIB NSF status of each node in the system: booting, normal, not forwarding, or activated.

NSF Time Remaining

If MSB NSF is activated, the time remaining until NSF fails and all routes are deleted displays. Before timeout, MRIB signals that NSF (in the control plane) is finished and new, updated routes are populated in the MFIB (which makes the transition to Normal status).

Related Commands

Command

Description

nsf lifetime (IGMP/MLD)

Configures the maximum time for the NSF timeout value under IGMP or MLD.

nsf (multicast)

Configures the NSF capability for the multicast routing system.

nsf lifetime (PIM)

Configures the NSF timeout value for the PIM process.

show igmp nsf

Displays the state of NSF operation in IGMP.

show mrib nsf

Displays the state of NSF operation in the MRIB.

show pim nsf

Displays the state of NSF operation for PIM.

show mfib route

To display route entries in the Multicast Forwarding Information Base (MFIB), use the show mfib route command in EXEC mode.

show mfib [ vrf vrf-name ] [ ipv4 | ipv6 ] route [ rate | * | source-IP-address | group-IP-address /prefix-length | detail | old-output | summary | location node-id ]

Syntax Description

*

(Optional) Display shared tree entries.

source-IP-address

(Optional) IP address or hostname of the multicast route source. Format is:

A.B.C.D or X:X::X.

group-IP-address

(Optional) IP address or hostname of the multicast group. Format is:

A.B.C.D or X:X::X.

/prefix-length

(Optional) Group IP prefix length of the multicast group. A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). Format is: A.B.C.D/length or X:X::X/length

A slash must precede the decimal value.

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

detail

(Optional) Specifies detailed route information.

location node-id

(Optional) Specifies an MFIB-designated node.

old-output

(Optional) Displays the old show output—available for backward compatibility.

rate

(Optional) Displays individual (S, G) rates.

sources-only

(Optional) Restricts display of any shared-tree entries.

summary

(Optional) Displays a brief list of the routing database.

tech-support

(Optional) Displays technical support information.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

The detail keyword was added.

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

All entries in the MFIB table are derived from the Multicast Routing Information Base (MRIB). The flags have the same connotation as in the MRIB. The flags determine the forwarding and signaling behavior according to a set of forwarding rules for multicast packets. In addition to the list of interfaces and flags, each route entry shows various counters. Byte count is the number of total bytes forwarded. Packet count is the number of packets received for this entry.

The show mfib counter command displays global counters independent of the routes.

This command displays counters for the number of packets and bytes that are handled by software switching. Counters for packets processed by hardware are displayed by the appropriate show mfib hardware command.

The command displays the cumulative rates per route for all line cards in the Multicast Forwarding Information Base (MFIB) table when the rate keyword is used with the source and group IP addresses.

The command displays the rate per route for one line card in Multicast Forwarding Information Base (MFIB) table when the statistics keyword is used.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib route command with the location keyword specified (the output fields are described in the header):

RP/0/RP0/CPU0:router# show mfib route location 0/1/CPU0 
IP Multicast Forwarding Information Base Entry flags: 
C - Directly-Connected Check, S - Signal, D - Drop,
  IA - Inherit Accept, IF - Inherit From, MA - MDT Address,
  ME - MDT Encap, MD - MDT Decap, MT - MDT Threshold Crossed,
  MH - MDT interface handle, CD - Conditional Decap,
  DT - MDT Decap True
Interface flags: F - Forward, A - Accept, IC - Internal Copy,
  NS - Negate Signal, DP - Don't Preserve, SP - Signal Present,
  EG - Egress, EI - Encapsulation Interface, MI - MDT Interface SW/HW Forwarding Counts: Packets in/Packets out/Bytes out SW Failure Counts: RPF / TTL / Empty Olist / Encap RL / Other HW Drop Counts: Ingress / Egress HW Forwarding Rates: bps In/pps In/bps Out/pps Out

(*,224.0.0.0/4),   Flags:  C 
  Last Used: 22:27:18
  SW Forwarding Counts: 608/0/0
  SW Failure Counts: 598/0/0/0
  HW Forwarding Counts: 840/6460964/284000578
  HW Drop Counts: N/A /N/A
  HW Forwarding Rates: N/A /N/A /N/A /N/A 

(*,224.0.0.0/24),   Flags:  D 
  Last Used: never
  SW Forwarding Counts: 0/0/0
  SW Failure Counts: 0/0/0/0
  HW Forwarding Counts: 0/6460964/284000578
  HW Drop Counts: N/A /N/A
  HW Forwarding Rates: N/A /N/A /N/A /N/A 
 
.....

The following is sample output from the show mfib route command with the summary and location keywords specified:

RP/0/RP0/CPU0:router# show mfib route summary location 0/1/CPU0

IP Multicast Forwarding Information Base Summary
  No. of (*,G) routes = 20015
  No. of (S,G) routes = 20020

The following is sample output from the show mfib route command with the statistics and location keywords specified. For route *, 239.1.1.1, the hardware counters show N/A, which means no hardware statistic blocks were assigned to the route *, 239.1.1.1. However, routes 200.180.161.9 and 239.1.1.1 show that both hardware and software statistic blocks were assigned. The output fields are described in the header.

RP/0/RP0/CPU0:router# show mfib route statistics location 0/1/CPU0

IP Multicast Forwarding Information Base 
Entry flags: C - Directly-Connected Check, S - Signal, D - Drop,
  IA - Inherit Accept, IF - Inherit From, MA - MDT Address,
  ME - MDT Encap, MD - MDT Decap, MT - MDT Threshold Crossed,
  MH - MDT interface handle, CD - Conditional Decap,
  DT - MDT Decap True
Interface flags: F - Forward, A - Accept, IC - Internal Copy,
  NS - Negate Signal, DP - Don't Preserve, SP - Signal Present,
  EG - Egress, EI - Encapsulation Interface, MI - MDT Interface
SW/HW Forwarding Counts: Packets in/Packets out/Bytes out
SW Failure Counts: RPF / TTL / Empty Olist / Encap RL / Other
HW Drop Counts: Ingress / Egress
HW Forwarding Rates: bps In/pps In/bps Out/pps Out

(*,224.0.0.0/4), Flags: C 
  Last Used: 03:24:50 
  SW Forwarding Counts: 9038/0/0 
  SW Failure Counts: 0/0/0/0 
  HW Forwarding Counts: N/A /N/A /N/A 
  HW Drop Counts: N/A /N/A
  HW Forwarding Rates: N/A /N/A /N/A /N/A

(*,224.0.0.0/24), Flags: D 
  Last Used: never 
  SW Forwarding Counts: 0/0/0 
  SW Failure Counts: 0/0/0/0 
  HW Forwarding Counts: N/A /N/A /N/A 
  HW Drop Counts: N/A /N/A
  HW Forwarding Rates: N/A /N/A /N/A /N/A

(*,239.1.1.1), Flags: C 
Last Used: 03:24:48 
  SW Forwarding Counts: 3/0/0 
  SW Failure Counts: 0/0/0/0 
  HW Forwarding Counts: N/A /N/A /N/A 
  HW Drop Counts: N/A /N/A 
  HW Forwarding Rates: N/A /N/A /N/A /N/A

POS0/2/0/2 Flags: NS EG 
POS0/2/0/1 Flags: NS EG

(200.180.161.9,239.1.1.1), Flags: 
  Last Used: 00:01:08 
  SW Forwarding Counts: 146/0/0 
  SW Failure Counts: 0/0/0/0 
  HW Forwarding Counts: 61327/61327/3924928 
  HW Drop Counts: 0/0 
  HW Forwarding Rates: N/A /N/A /N/A /N/A
POS0/2/0/2 Flags: NS EG 
POS0/2/0/1 Flags: A EG

(*,239.1.1.2), Flags: C 
  Last Used: 03:24:37 
  SW Forwarding Counts: 7/0/0 
  SW Failure Counts: 0/0/0/0 
  HW Forwarding Counts: N/A /N/A /N/A 
  HW Drop Counts: N/A /N/A
  HW Forwarding Rates: N/A /N/A /N/A /N/A

Related Commands

Command

Description

show mfib counter

Displays Multicast Forwarding Information Base (MFIB) counter statistics for packets that have dropped.  

show mfib hardware route accept-bitmap

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the interface list that accepts bidirectional routes.  

show mfib hardware route olist

Displays platform-specific Multicast Forwarding Information Base (MFIB) information in the output interface list (olist) stored in the hardware.  

show mfib hardware route statistics

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route.  

show mfib interface

Displays interface-related information used during software multicast switching in the Multicast Forwarding Information Base (MFIB) process.  

show mrib route

Displays all entries in the Multicast Routing Information Base (MRIB).  

show mfib table-info

To display Multicast Forwarding Information Base (MFIB) table information, use the show mfib table-info command in EXEC mode.

show mfib [ ipv4 | ipv6 ] table-info { table-id | vrf-name } [ local | remote ] [ location node-id ]

Syntax Description

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

table-id

Specifies the table identifier. Range is 0 to 4294967295.

vrf-name

Specifies the VRF name.

local

Specifies local tables only.

remote

Specifies remote tables only.

location node-id

(Optional) Specifies MFIB connections associated with an interface of the designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.6.0

The local and remote keywords were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mfib table-info command showing the number of receiver VRF routes and the default MDT handle associated with this VRF in boldface.

RP/0/RP0/CPU0:router#show mfib table-info vrf 101 

Table Name           : vrf15
VRid/TID/VID         : 0x0 / 0xe000000f / 0x6000000f
Table type           : TBL_TYPE_NAME_VID
Active/Linked        : Y / Y
Prev Table ID        : 0x0
Location             : Local
Local ifcount        : 2
Child routes         :	(5.5.5.5, 225.101.1.15/32)
 
Default MDT Handle   : 0x0 (Ha0x0)
          

MDT Master LC        : Y
Loopback (Encap Src) : 0x9000180 (Loopback0)
Local EG intf cnt    : 508
Data MDT             : Acl - (-), All vrf routes N, 0 Kbps

This table describes the significant fields shown in the display.



Table 9 show mfib table-info Field Descriptions

Field

Description

Table Name

Name of the MFIB table.

VRid/TID/VID

Table identifiers.

Table type

Type of MFIB table.

Active/Linked

Table is active and linked.

Location

Location of the MFIB table.

Local ifcount

Local interface count.

Child routes

Child routes shows the number of extranet routes in receiver VRFs that reference this source VRF.

Default MDT Encap

Default MDT encapsulation.

Default MDT Handle

Default MDT interface handle for this VRF.

MDT Master LC

Field contains "Y" if this line card is a master line card for this VRF.

Loopback (Encap Src)

Loopback (encapsulation source).

Local EG intf cnt

Shows the number of local egress interfaces for this VRF and location.

Data MDT

Routes for which multicast data for a multicast distribution tree (MDT) was triggered.

show mhost default-interface

To display the active default interface for the Multicast Host (MHost) process, use the show mhost default-interface command in EXEC mode.

show mhost [ ipv4 | ipv6 ] default-interface

Syntax Description

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs.

The show mhost default-interface command is used to show both the configured and active MHost default interfaces. The configured interface is the one specified by the mhost default-interface command; otherwise, the configured interface is displayed as none.

The active interface is the one currently being used as the default. The active interface may differ from the one configured when multicast routing is enabled and the configured interface is not operational. This command is useful when applications such as auto-rendezvous point (Auto-RP), ping, or MTrace are not functioning as expected.

Task ID

Task ID

Operations

network

read

Examples

The following is sample output for the show mhost default-interface command that shows that loopback interface 0 was configured as the MHost default interface, and it is the active default interface:

RP/0/RP0/CPU0:router# show mhost default-interface

mhost configured default interface is 'Loopback0'
mhost active default interface is 'Loopback0'

Related Commands

Command

Description

mhost default-interface

Configures the default interface for IP multicast transmission and reception to and from the host stack.  

show mhost groups

To display various multicast groups joined directly on the interface, use the show mhost groups command in EXEC mode.

show mhost [ ipv4 | ipv6 ] groups type interface-path-id [ location node-id ]

Syntax Description

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Physical interface or virtual interface.

Note   

Use the show interfaces command in EXEC mode to see a list of all interfaces currently configured on the router.

For more information about the syntax for the router, use the question mark ( ? ) online help function.

location node-id

(Optional) Specifies a designated node.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show mhost groups command is used to display the groups joined by applications and verifies that the MHost application is functioning properly.

Task ID

Task ID

Operations

network

read

Examples

The following is sample output from the show mhost groups command that shows the MHost groups 239.1.1.1, 224.0.0.22, 224.0.0.2, 224.0.0.1, 224.0.0.13, and 224.0.1.40 have joined on loopback 0 interface:

RP/0/RP0/CPU0:router# show mhost groups loopback 0

Loopback 0
239.1.1.1 : includes 1, excludes 0, mode INCLUDE 
33.3.3.3 : includes 1, excludes 0, active in INCLUDE filter 
224.0.0.22 : includes 0, excludes 1, mode EXCLUDE 
<no source filter> 
224.0.0.2 : includes 0, excludes 1, mode EXCLUDE 
<no source filter> 
224.0.0.1 : includes 0, excludes 1, mode EXCLUDE 
<no source filter> 
224.0.0.13 : includes 0, excludes 1, mode EXCLUDE 
<no source filter> 
224.0.1.40 : includes 0, excludes 2, mode EXCLUDE 
<no source filter> 

This table describes the significant fields shown in the display.



Table 10 show mhost groups Field Descriptions

Field

Description

includes

Number of source addresses in the include list.

excludes

Number of source addresses in the exclude list.

mode

Multicast socket filter mode: include or exclude.

33.3.3.3

Source address list to be included or excluded based on the multicast filter mode.

Related Commands

Command

Description

show mfib hardware route accept-bitmap

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the interface list that accepts bidirectional routes.  

show mfib hardware route olist

Displays platform-specific Multicast Forwarding Information Base (MFIB) information in the output interface list (olist) stored in the hardware.  

show mfib hardware route statistics

Displays platform-specific Multicast Forwarding Information Base (MFIB) information for the packet and byte counters for each route.  

show mfib hardware route summary

Displays summary platform-specific Multicast Forwarding Information Base (MFIB) hardware information for each route entry.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mrib client

To display the state of the Multicast Routing Information Base (MRIB) client connections, use the show mrib client command in EXEC mode.

show mrib [ vrf vrf-name ] [ ipv4 | ipv6 ] [old-output] client [filter] [client-name]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

old-output

(Optional) Displays the old show output—available for backward compatibility.

filter

(Optional) Displays route and interface level flag changes that various MRIB clients have registered and shows what flags are owned by the MRIB clients.

client-name

(Optional) Name of a multicast routing protocol that acts as a client of MRIB, such as Protocol Independent Multicast (PIM) or Internet Group Management Protocol (IGMP).

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mrib client command using the filter option:

RP/0/RP0/CPU0:router# show mrib client filter 

IP MRIB client-connections 
igmp:417957 (connection id 0) 
 ownership filter: 
  interface attributes: II ID LI LD 
  groups:
   include 0.0.0.0/0
  interfaces: 
   include All
pim:417959 (connection id 1)
 interest filter:
  entry attributes: E
  interface attributes: SP II ID LI LD
  groups:
   include 0.0.0.0/0
  interfaces:
   include All
 ownership filter:
  entry attributes: L S C IA IF D
  interface attributes: F A IC NS DP DI EI
  groups:
   include 0.0.0.0/0
  interfaces:
   include All
bcdl_agent:1 (connection id 2)
 interest filter:
  entry attributes: S C IA IF D
  interface attributes: F A IC NS DP SP EI
  groups:
   include 0.0.0.0/0
  interfaces:
   include All
 ownership filter:
  groups:
   include 0.0.0.0/0
  interfaces:
   include All

This table describes the significant fields shown in the display.



Table 11 show mrib client Field Descriptions

Field

Description

igmp

Name of the client.

417957

Personal identifier (PID) or a unique ID assigned by MRIB.

(connection id 0)

Unique client connection identifier.

ownership filter:

Specifies all the route entry and interface-level flags that are owned by the client. As the owner of the flag, only the client can add or remove the flag. For example, only the Internet Group Management Protocol (IGMP) client can add the II flag on an interface. MRIB does not allow a non-owner to register or modify the same flag.

groups: include 0.0.0.0/0interfaces: include All

Groups and interfaces registered by the clients consisting of two lists. One is an include list (items for which the client requests to be notified.) The use of “All” implies all interfaces and 0.0.0.0/0 to indicate all groups. Not shown in this example is the exclude list. This list contains items for which the client requests not to be notified when modifications occur.

interface attributes:

II ID LI LD

Interface-level flags set on the interface belong to a route.

interest filter:

Specifies all the flags, groups, and interfaces from which the client requests information. When a flag of interest for a client is modified, the client is notified.

entry attributes:

S C IA IF D

Entry-level flags that are set on the route.

Related Commands

Command

Description

show mfib nsf

Displays the state of a nonstop forwarding (NSF) operation for the Multicast Forwarding Information Base (MFIB) line cards.  

show mfib route

Displays route entries in the Multicast Forwarding Information Base (MFIB).  

show mrib nsf

Displays the state of nonstop forwarding (NSF) operation in the Multicast Routing Information Base (MRIB).  

show mrib fgid

To display the platform-specific Multicast Routing Information Base (MRIB) fabric group identifier (FGID) data, use the show mrib fgid command in EXEC mode.

show mrib fgid [ chkptdb | info | mstats | ostats | stats ]

Syntax Description

chkptdb

(Optional) Dumps the MRIB FGID checkpoint database.

info

(Optional) Displays the MRIB FGID information.

mstats

(Optional) Displays the MRIB FGID memory statistics.

ostats

(Optional) Displays the MRIB FGID operation statistics.

stats

(Optional) Displays the MRIB FGID statistics.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.9.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is the sample output from the show mrib fgid command:

RP/0/RP0/CPU0:router# show mrib fgid info 

show mrib label-table-info

To display the Multicast Routing Information Base (MRIB) label table information, use the show mrib label-table-info command in EXEC mode.

show mrib label-table-info

Syntax Description

This command has no keywords or arguments.

Command Default

None.

Command Modes

EXEC

Command History

Release

Modification

Release 3.9.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is the sample output from the show mrib label-table-info command:

RP/0/RP0/CPU0:router# show mrib label-table-info 

VRF: default [tid 0xe0000000]
Registered Client:
  te_control [ccbid: 4 cltid: 778528 restart: 60000 recovery: 60000]
  lmrib_bcdl [ccbid: 2 cltid: 1 restart: 0 recovery: 0]

show mrib mdt-interface

To verify that the Multicast Routing Information Base (MRIB) has correctly learned multicast distribution tree (MDT) interface handles from Protocol Independent Multicast (PIM) and that it shows the corresponding table ID for each handle, use the show mrib mdt-interface command in EXEC mode.

show mrib mdt-interface [ detail | ifh ]

Syntax Description

detail

(Optional) Shows the dependent VRF routes for the MDT interface handles learned from PIM.

ifh

(Optional) Specifies the mapping for a particular MDT interface handle learned from PIM.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

You can use the show mrib mdt-interface command to help debug an MVPN route collapse in MRIB when Extranet VRF dependencies are introduced. For example, MRIB may learn about a route update from PIM with an MDT handle associated with a different VRF table than the source VRF table. This database can then be useful in verifying that the MDT handle for the dependent VRF has been learned correctly.

Task ID

Task ID

Operations

multicast

read

Examples

The following example illustrates detailed output from the show mrib mdt-interface command with the MDT interface handle name shown in parantheses in the output (mdtgreen):

RP/0/RP0/CPU0:router# show mrib mdt-interface detail 

Fri Dec 12 00:12:16.001 UTC 
IP Multicast MRIB MDT ifhandle Interface DB
MH - Handle update count, I - Intranet route count, EX - Extranet route count, Up - Uptime
0x9042b80(mdtvrf20)  TID:0xe0000014  MH:1  I:0  EX:0  Up:6d01h 
    MDT route forward-reference DB: 
0x9042c80(mdtvrf19)  TID:0xe0000013  MH:1  I:0  EX:0  Up:6d01h 
    MDT route forward-reference DB: 
0x9042d80(mdtvrf11)  TID:0xe000000b  MH:1  I:0  EX:0  Up:6d01h 
    MDT route forward-reference DB: 
0x9042e80(mdtvrf10)  TID:0xe000000a  MH:1  I:250  EX:0  Up:6d01h 
    MDT route forward-reference DB: 
    (18.18.10.2,232.0.0.1/32) [tid:0xe000000a] recollapse: FALSE
    (18.18.10.2,232.0.0.2/32) [tid:0xe000000a] recollapse: FALSE
    (18.18.10.2,232.0.0.3/32) [tid:0xe000000a] recollapse: FALSE
    (18.18.10.2,232.0.0.4/32) [tid:0xe000000a] recollapse: FALSE
...

This table describes the significant fields shown in the display.



Table 12 show mrib mdt-interface Field Descriptions

Field

Description

TID, tid

VRF table ID associated with the MDT handle.

MH

Number of times the MDT interface handle has been received.

Used for debugging, because it allows you to identify duplicate updates. Under normal conditions, the value should be 1.

I

Number of intranet routes using a specific MDT interface handle.

EX

Number of extranet routes using a specific MDT interface handle.

Up

Uptime—Elapsed time since MDT interface handle was learned.

recollapse

Set to TRUE in situations where the MDT information (such as default MDT group or MDT interface handle) for a dependent VRF table was not received from PIM during a route collapse. The route will be “recollapsed” when all the dependent information is received.

When you use the detail keyword, the output displays dependent VRF routes. Otherwise, only the MDT interface mappings appear.

Related Commands

Command

Description

show mrib route-collapse

Displays the contents of the Multicast Routing Information Base (MRIB) route-collapse database.  

show mrib nsf

To display the state of nonstop forwarding (NSF) operation in the Multicast Routing Information Base (MRIB), use the show mrib nsf command in EXEC mode.

show mrib [ ipv4 | ipv6 ] [old-output] nsf

Syntax Description

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

old-output

(Optional) Displays the old show output—available for backward compatibility.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show mrib nsf command displays the current multicast NSF state for the MRIB. The state may be normal or activated for NSF. The activated state indicates that recovery is in progress due to a failure in MRIB or Protocol Independent Multicast (PIM). The total NSF timeout and time remaining are displayed until NSF expiration.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mrib nsf command:

RP/0/RP0/CPU0:router# show mrib nsf
          		
IP MRIB Non-Stop Forwarding Status: 
Multicast routing state: Non-Stop Forwarding Activated 
NSF Lifetime: 00:03:00 
NSF Time Remaining: 00:01:40 

This table describes the significant fields shown in the display.



Table 13 show mrib nsf Field Descriptions

Field

Description

Multicast routing state

Multicast NSF status of the MRIB (Normal or NSF Activated).

NSF Lifetime

Timeout for MRIB NSF, computed as the maximum of the PIM and Internet Group Management Protocol (IGMP) NSF lifetimes, plus 60 seconds.

NSF Time Remaining

If MRIB NSF state is activated, the time remaining until MRIB reverts to Normal mode displays. Before this timeout, MRIB receives notifications from IGMP and PIM, triggering a successful end of NSF and cause the transition to normal state. If notifications are not received, the timer triggers a transition back to normal mode, causing new routes to download to MFIB and old routes to be deleted.

Related Commands

Command

Description

nsf (multicast)

Configures the NSF capability for the multicast routing system.

nsf lifetime (IGMP/MLD)

Configures the maximum time for the NSF timeout value under IGMP or MLD.

nsf lifetime (PIM)

Configures the NSF timeout value for the PIM process.

show igmp nsf

Displays the state of NSF operation in IGMP.

show mfib nsf

Displays the state of NSF operation in the MFIB line cards.

show pim nsf

Displays the state of NSF operation for PIM.

show mrib route

To display all entries in the Multicast Routing Information Base (MRIB), use the show mrib route command in EXEC mode.

show mrib [ vrf vrf-name ] [ ipv4 | ipv6 ] [old-output] route [ summary | outgoing-interface | [ * | source-address ] [ group-address [ /prefix-length ] ] ] [detail]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

*

(Optional) Displays shared tree entries.

source-address

(Optional) Source IP address or hostname of the MRIB route. Format is:

A.B.C.D or X:X::X.

group-address

(Optional) Group IP address or hostname of the MRIB route. F ormat is:

A.B.C.D or X:X::X.

/prefix-length

(Optional) Prefix length of the MRIB group address. A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). A slash must precede the decimal value. Format is:

A.B.C.D or X:X::X.

outgoing-interface

(Optional) Displays the outgoing-interface information.

summary

(Optional) Displays a summary of the routing database.

detail

(Optional) Displays the routing database with the platform data.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release 2.0

This command was introduced.

Release 3.4.0

The detail keyword was added.

Release 3.5.0

The vrf vrf-name keyword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Each line card has an individual Multicast Forwarding Information Base (MFIB) table. The MFIB table maintains a subset of entries and flags updated from MRIB. The flags determine the forwarding and signaling behavior according to a set of forwarding rules for multicast packets. In addition to the list of interfaces and flags, each route entry shows various counters. Byte count is the number of total bytes forwarded. Packet count is the number of packets received for this entry.

The show mfib counter command displays global counters independent of the routes.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mrib route command (the output fields are described in the header):

RP/0/RP0/CPU0:router# show mrib route

IP Multicast Routing Information Base
Entry flags: L - Domain-Local Source, E - External Source to the Domain,
    C - Directly-Connected Check, S - Signal, IA - Inherit Accept,
    IF - Inherit From, D - Drop, MA - MDT Address, ME - MDT Encap,
    MD - MDT Decap, MT - MDT Threshold Crossed, MH - MDT interface handle
    CD - Conditional Decap
Interface flags: F - Forward, A - Accept, IC - Internal Copy,
    NS - Negate Signal, DP - Don't Preserve, SP - Signal Present,
    II - Internal Interest, ID - Internal Disinterest, LI - Local Interest,
    LD - Local Disinterest, DI - Decapsulation Interface
    EI - Encapsulation Interface, MI - MDT Interface

(*,224.0.0.0/4) RPF nbr: 10.11.1.20 Flags: L C
 Outgoing Interface List
  Decapstunnel0 Flags: NS

(*,224.0.0.0/24) Flags: D

(*,224.0.1.39) Flags: S

(*,224.0.1.40) Flags: S
 Outgoing Interface List
  POS0/3/0/0 Flags: II LI

(*,238.1.1.1) RPF nbr: 10.11.1.20 Flags: C
 Outgoing Interface List
  POS0/3/0/0 Flags: F NS LI
  Decapstunnel0 Flags: A

(*,239.1.1.1) RPF nbr: 10.11.1.20 Flags: C
 Outgoing Interface List
  POS0/3/0/0 Flags: F NS
  Decapstunnel0 Flags: A

The following shows output when the vrf and detail keywords are used:

RP/0/RP0/CPU0:router# show mrib vrf vrf1 route detail

IP Multicast Routing Information Base
Entry flags: L - Domain-Local Source, E - External Source to the Domain,
    C - Directly-Connected Check, S - Signal, IA - Inherit Accept,
    IF - Inherit From, D - Drop, MA - MDT Address, ME - MDT Encap,
    MD - MDT Decap, MT - MDT Threshold Crossed, MH - MDT interface handle
    CD - Conditional Decap, MPLS - MPLS Decap, MF - MPLS Encap, EX - Extranet
Interface flags: F - Forward, A - Accept, IC - Internal Copy,
    NS - Negate Signal, DP - Don't Preserve, SP - Signal Present,
    II - Internal Interest, ID - Internal Disinterest, LI - Local Interest,
    LD - Local Disinterest, DI - Decapsulation Interface
    EI - Encapsulation Interface, MI - MDT Interface, LVIF - MPLS Encap,
    EX - Extranet
 
(*,0.0.0.101) Ver: 0x818 Flags: MA, FMA: 0x0
  MDT Address: 5.5.5.5
  Up: 6d01h
 
(*,0.0.0.102) Ver: 0x5337 Flags: MA, FMA: 0x0
  MDT Address: 225.101.1.1
  Up: 6d01h
 
(*,0.0.0.103) Ver: 0x6cea Flags: ML, FMA: 0x0
  Master Linecard Slot: 0/3/CPU0
  Up: 6d01h
 
(*,0.0.0.104) Ver: 0x7ca Flags: MBH, FMA: 0x0
  BGP IFH:  0x9000180
  Up: 6d01h
 
(*,0.0.0.105) Ver: 0x5b67 Flags: MLF, FMA: 0x0
  Master Linecard Fallback Slot: 0/3/CPU0
  Up: 6d01h
 
(*,0.0.0.107) Ver: 0x382c Flags: MDT_IFH, FMA: 0x0 
  Up: 6d01h 
  MDT IFH:  0x9043d80 
...

The following example shows detailed output for a source VRF route in a receiver on the source PE router in an MVPN extranet topology), with the MDT core tree ID of the receiver VRF displayed.

RP/0/RP0/CPU0:router# show mrib vrf vrf15 route 18.18.15.2 225.0.0.1 detail

IP Multicast Routing Information Base
Entry flags: L - Domain-Local Source, E - External Source to the Domain,
    C - Directly-Connected Check, S - Signal, IA - Inherit Accept,
    IF - Inherit From, D - Drop, MA - MDT Address, ME - MDT Encap,
    MD - MDT Decap, MT - MDT Threshold Crossed, MH - MDT interface handle
    CD - Conditional Decap, MPLS - MPLS Decap, MF - MPLS Encap, EX - Extranet
Interface flags: F - Forward, A - Accept, IC - Internal Copy,
    NS - Negate Signal, DP - Don't Preserve, SP - Signal Present,
    II - Internal Interest, ID - Internal Disinterest, LI - Local Interest,
    LD - Local Disinterest, DI - Decapsulation Interface
    EI - Encapsulation Interface, MI - MDT Interface, LVIF - MPLS Encap,
    EX - Extranet

Related Commands

Command

Description

nsf lifetime (IGMP/MLD)

Configures the maximum time for the NSF timeout value on the IGMP.

show mfib counter

Displays MFIB counter statistics for packets that have dropped.

show mrib route-collapse

Displays the contents of the MRIB route collapse database.

show mrib mdt-interface

Helps in troubleshooting whether or not MRIB has correctly learned the MDT interface handles from PIM, and whether or not the corresponding table ID for each handle is shown.

show mfib route

Displays all entries in the MFIB table.

show mrib route-collapse

To display the contents of the Multicast Routing Information Base (MRIB) route-collapse database, use the show mrib route-collapse command in EXEC mode.

show mrib [ vrf vrf-name ] [ ipv4 | ipv6 ] route-collapse [core-tree]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

core-tree

(Optional) IPv4 Multicast Distribution Tree (MDT) group address.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.8.0

MVPN extanet attributes were added to the output for this command.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mrib route-collapse command:

RP/0/RP0/CPU0:router# show mrib route-collapse 

226.1.1.1  TID: 0xe0000038   TLC TID: 0xe0000038
  Customer route database count: 5
    (192.168.5.204,224.0.1.40/32)
    (*,226.226.226.226/32)
    (*,228.228.228.228/32)
    (192.168.113.17,228.228.228.228/32)
    (*,229.229.229.229/32)
  Core route database count: 4
    (*,226.1.1.1/32)
    (192.168.5.201,226.1.1.1/32)
    (192.168.5.202,226.1.1.1/32)
    (192.168.5.204,226.1.1.1/32)
  Core egress node database count: 1
    nodeid        slot            refcount
    0x20          0/2/CPU0        1       

192.168.27.1  TID: 0xe0000039   TLC TID: 0xe0000039
  Customer route database count: 1
    (192.168.113.33,227.227.227.227/32)
  Core route database count: 3
    (*,227.27.27.1/32)
    (192.168.5.201,227.27.27.1/32)
    (192.168.5.202,227.27.27.1/32)
  Core egress node database count: 1
    nodeid        slot            refcount
    0x20          0/2/CPU0        1       

192.168.28.1  TID: 0xe000003a   TLC TID: 0xe000003a
  Customer route database count: 2
    (192.168.5.204,224.0.1.40/32)
    (192.168.113.49,229.229.229.229/32)
  Core route database count: 3
    (192.168.5.201,228.28.28.1/32)
    (192.168.5.202,228.28.28.1/32)
    (192.168.5.204,228.28.28.1/32)
  Core egress node database count: 1
    nodeid        slot            refcount
    0x20          0/2/CPU0        1

Related Commands

Command

Description

show mrib route

Displays all entries in the Multicast Routing Information Base (MRIB).  

show mrib route outgoing-interface

To display the outgoing-interface information on the Multicast Routing Information Base (MRIB), use the show mrib route outgoing-interface command in EXEC mode.

show mrib route outgoing-interface [ * | source-address ] [ group-address [ /prefix-length ] ]

Syntax Description

*

(Optional) Displays shared tree entries.

A.B.C.D

(Optional) Source IP address or hostname of the MRIB route. Format is:

A.B.C.D or X:X::X.

A.B.C.D

(Optional) Group IP address or hostname of the MRIB route and the prefix length.

/prefix-length

(Optional) Prefix length of the MRIB group address. A decimal value that indicates how many of the high-order contiguous bits of the address compose the prefix (the network portion of the address). A slash must precede the decimal value. Format is:

A.B.C.D or X:X::X.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.9.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mrib route outgoing-interface command:

RP/0/RP0/CPU0:router# show mrib route outgoing-interface

IP Multicast Routing Information Base
Entry flags: L - Domain-Local Source, E - External Source to the Domain,
    C - Directly-Connected Check, S - Signal, IA - Inherit Accept,
    IF - Inherit From, D - Drop, MA - MDT Address, ME - MDT Encap,
    MD - MDT Decap, MT - MDT Threshold Crossed, MH - MDT interface handle
    CD - Conditional Decap, MPLS - MPLS Decap, MF - MPLS Encap, EX - Extranet
    MoFE - MoFRR Enabled, MoFS - MoFRR State

(*,224.0.0.0/4), Up:6d10h, OIF count:0, flags: C
(*,224.0.0.0/24), Up:6d10h, OIF count:0, flags: D
(*,224.0.1.39), Up:6d10h, OIF count:3, flags: S
(10.1.1.1,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.2.2.2,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.3.3.3,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.4.4.4,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.5.5.5,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.6.6.6,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.7.7.7,224.0.1.39), Up:00:04:17, OIF count:11, flags:
(10.8.8.8,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.9.9.9,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.10.10.10,224.0.1.39), Up:6d10h, OIF count:11, flags:
(10.21.21.21,224.0.1.39), Up:6d06h, OIF count:11, flags:
(*,224.0.1.40), Up:6d10h, OIF count:2, flags: S
(10.1.1.1,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.2.2.2,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.6.6.6,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.13.4.3,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.14.4.4,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.14.8.4,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.21.21.21,224.0.1.40), Up:6d06h, OIF count:11, flags:
(10.23.4.3,224.0.1.40), Up:00:02:38, OIF count:11, flags:
(10.23.8.3,224.0.1.40), Up:00:02:38, OIF count:11, flags:
(10.34.4.3,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.34.8.3,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.35.4.3,224.0.1.40), Up:00:02:38, OIF count:11, flags:
(10.35.4.5,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.38.4.8,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.45.4.5,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.49.4.9,224.0.1.40), Up:6d10h, OIF count:11, flags:
(10.105.4.10,224.0.1.40), Up:6d10h, OIF count:11, flags:
(*,225.0.0.0/8), Up:6d06h, OIF count:0, flags: C
(*,226.0.0.0/8), Up:6d06h, OIF count:0, flags: C
(*,232.0.0.0/8), Up:6d10h, OIF count:0, flags: D
(10.6.6.6,232.1.1.1), Up:6d10h, OIF count:3, flags:
(10.7.7.7,232.1.1.1), Up:6d10h, OIF count:2, flags:
(10.8.8.8,232.1.1.1), Up:6d10h, OIF count:2, flags:
(10.9.9.9,232.1.1.1), Up:6d10h, OIF count:2, flags:
(10.10.10.10,232.1.1.1), Up:6d10h, OIF count:2, flags:
(10.21.21.21,232.1.1.1), Up:6d06h, OIF count:3, flags:

Related Commands

Command

Description

show mrib route

Displays all entries in the Multicast Routing Information Base (MRIB).  

show mrib table-info

To display Multicast Routing Information Base (MRIB) table information, use the show mrib table-info command in EXEC mode.

show mrib [ vrf vrf-name ] [ ipv4 | ipv6 ] table-info

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.8.0

New MVPN extranet attributes were added to command output.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mrib table-info command:

RP/0/RP0/CPU0:router# show mrib vrf vrf101 table-info
         
VRF: default [tid 0xe0000000]
Registered Client:
  igmp [ccbid: 0 cltid: 4485366]
  pim [ccbid: 1 cltid: 4485368]
  bcdl_agent [ccbid: 2 cltid: 1]
  msdp [ccbid: 3 cltid: 8827135]
Table 14 show mrib table-info Field Descriptions

Field

Description

VRF

Default VRF or a VRF configured for the purpose of an override in MVPN.

cltid

Client ID.

bcdl_agent

A process like igmp and pim, which is used to download routes to line card.

MDT handle

MDT interface handle for this VRF.

MDT group

Default MDT group associated with this VRF.

MDT source

Per-VRF MDT source information.

Related Commands

Command

Description

show mrib tlc

Displays the contents of the Multicast Routing Information Base (MRIB) table-line card (TLC) database.  

show mrib tlc

To display the contents of the Multicast Routing Information Base (MRIB) table-line card (TLC) database, use the show mrib tlc command in EXEC mode.

show mrib [ vrf vrf-name ] [ ipv4 | ipv6 ] tlc [remote]

Syntax Description

vrf vrf-name

(Optional) Specifies a VPN routing and forwarding (VRF) instance.

ipv4

(Optional) Specifies IPv4 address prefixes.

ipv6

(Optional) Specifies IPv6 address prefixes.

remote

(Optional) Displays the linked remote entry.

Command Default

IPv4 addressing is the default.

Command Modes

EXEC

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.6.0

The remote keyword was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

multicast

read

Examples

The following is sample output from the show mrib tlc command:

RP/0/RP0/CPU0:router# show mrib tlc

VRF: default [tid 0xe0000000]
Master LC slot: Not selected
Associated MDT group: 0
Forwarding LC node: 0

This table describes the significant fields shown in the display.



Table 15 show msdp peer Field Descriptions

Field

Description

Associated MDT group

IP address of the MSDP peer.

Master LC slot

Indicates whether the master LC slot has been selected.

Forwarding LC node

Autonomous system to which the peer belongs.

Associated MDT group

Indicates the number of associated MDT groups.

static-rpf

To configure a static Reverse Path Forwarding (RPF) rule for a specified prefix mask, use the static-rpf command in an appropriate configuration mode. To return to the default behavior, use the no form of this command.

static-rpf prefix-address prefix-mask type path-id next-hop-address

no static-rpf

Syntax Description

prefix-address

IP address of a prefix for an address range.

prefix-mask

Prefix mask for an address range. Range is 0 to 32 for IPv4 and 0 to 128 for IPv6.

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Physical interface or virtual interface.

Note   

Use the show interfaces command in EXEC mode to see a list of all interfaces currently configured on the router.

For more information about the syntax for the router, use the question mark ( ? ) online help function.

next-hop-address

IP address for an RPF neighbor.

Command Default

A static RPF rule for a specified prefix mask is not configured.

Command Modes

Multicast routing configuration

Multicast routing address family ipv4 and ipv6 configuration

Multicast VRF configuration

Command History

Release

Modification

Release 2.0

This command was introduced.

Release 3.5.0

This command was supported in multicast VRF configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The static-rpf command is used to configure incompatible topologies for unicast and multicast traffic.

Use the static-rpf command to configure a static route to be used for RPF checking in Protocol Independent Multicast (PIM) instead of using the unicast routing table.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example configures the static RPF rule for IP address 10.0.0.1:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# vrf green
RP/0/RP0/CPU0:router(config-mcast)# static-rpf 10.0.0.1 32 GigE 0/0/5/0 10.1.1.1

Related Commands

Command

Description

show pim bsr candidate-rp

Displays PIM candidate rendezvous point information for the BSR.

ttl-threshold (multicast)

To configure the time-to-live (TTL) threshold for packets being forwarded out an interface, use the ttl-threshold command in the appropriate configuration mode. To return to the default behavior, use the no form of this command.

ttl-threshold ttl

no ttl-threshold ttl

Syntax Description

ttl

Time to live value. Range is 1 to 255.

Command Default

ttl : 0

Command Modes

Multicast routing interface configuration

Multicast routing VRF interface configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced as a replacement for the multicast ttl-threshold command.

Release 3.5.0

This command was supported in multicast routing VRF interface configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Only multicast packets with a TTL value greater than the threshold are forwarded out of the interface. The TTL threshold is compared to the TTL of the packet after it has been decremented by one and before being forwarded.

Configure the TTL threshold only on border routers.


Note


Do not confuse this command with the ttl-threshold (MSDP) command in router MSDP configuration mode that is used to confine the multicast data packet TTL to be sent by an Multicast Source Discovery Protocol (MSDP) Source-Active (SA) message.


Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to configure the TTL threshold to 23, which means that a multicast packet is dropped and not forwarded out of the GigE 0/1/0/0 interface:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# interface GigE 0/1/0/CPU0
RP/0/RP0/CPU0:router(config-mcast-default-ipv4-if)# ttl-threshold 23

Related Commands

Command

Description

ttl-threshold (MSDP)

Limits which multicast data packets are sent in SA messages to an MSDP peer.

vrf (multicast)

To configure a virtual routing and forwarding (VRF) instance for a VPN table, use the vrf command in multicast routing configuration mode. To remove the VRF instance from the configuration file and restore the system to its default condition, use the no form of this command.

vrf vrf-name [ ipv4 | ipv6 ]

no vrf vrf-name [ ipv4 | ipv6 ]

Syntax Description

vrf-name

Name of the VRF instance. The following names cannot be used: all, default, and global.

ipv4

(Optional) Configures IPv4 address prefixes.

ipv6

(Optional) Configures IPv6 address prefixes.

Command Default

No default behavior or values.

Command Modes

Multicast routing configuration

Command History

Release

Modification

Release 3.5.0

This command was introduced.

Release 3.7.0

ipv4 and ipv6 submodes were supported.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

A VRF instance is a collection of VPN routing and forwarding tables maintained at the provider edge (PE) router.

Task ID

Task ID

Operations

multicast

read, write

Examples

The following example shows how to configure a VRF instance and enter VRF configuration mode:

RP/0/RP0/CPU0:router(config)# multicast-routing
RP/0/RP0/CPU0:router(config-mcast)# vrf vrf_1
RP/0/RP0/CPU0:router(config-mcast-vrf_1-ipv4)# mdt ?
        		
data     Data MDT group configuration
default  MDT default group address
mtu      MDT mtu configuration
source   Interface used to set MDT source address

Related Commands

Command

Description

boundary

Configures a boundary to keep multicast packets from being forwarded.

accounting per-prefix

Enables per-prefix counters only in hardware.

interface (multicast)

Configures multicast interface properties.

log-traps

Enables logging of trap events.

mdt data

Configures the MDT data group address range.

mdt default

Configures the default group address of the multicast VPN (MVPN) multicast distribution tree (MDT).

mdt mtu

Configures the maximum transmission unit (MTU) configuration of the multicast VPN (MVPN) multicast distribution tree (MDT).

mdt source

Configures the interface used to set the multicast VPN (MVPN) data multicast distribution tree (MDT) source address.

multipath

Enables Protocol Independent Multicast (PIM) to divide the multicast load among several equal-cost paths.

rate-per-route

Enables individual (source, group [S, G]) rate calculations.

ssm

Defines the Protocol Independent Multicast (PIM)-Source Specific Multicast (SSM) range of IP multicast addresses.

static-rpf

Configures a static Reverse Path Forwarding (RPF) rule for a specified prefix mask.