Cisco IOS XR IP Addresses and Services Command Reference, Release 3.4 - Cisco Express Forwarding Commands on Cisco IOS XR Software [Cisco IOS XR Software]

Table Of Contents

Cisco Express Forwarding Commands on Cisco IOS XR Software

clear adjacency ipv4

clear adjacency statistics

clear cef ipv4 drops

clear cef ipv4 exceptions

clear cef ipv4 interface bgp-policy-statistics

clear cef ipv4 interface rpf-statistics

clear cef ipv6 drops

clear cef ipv6 exceptions

clear cef ipv6 interface bgp-policy-statistics

clear cef ipv6 interface rpf-statistics

ipv4 bgp policy accounting

ipv4 verify unicast source reachable-via

ipv6 bgp policy accounting

ipv6 verify unicast source reachable-via any

rp mgmtethernet forwarding

show adjacency

show cef ipv4

show cef ipv4 adjacency

show cef ipv4 adjacency hardware

show cef ipv4 drops

show cef ipv4 exact-route

show cef ipv4 exceptions

show cef ipv4 external hardware

show cef ipv4 hardware

show cef ipv4 interface

show cef ipv4 interface bgp-policy-statistics

show cef ipv4 non-recursive

show cef ipv4 resources

show cef ipv4 summary

show cef ipv4 unresolved

show cef ipv6

show cef ipv6 adjacency

show cef ipv6 adjacency hardware

show cef ipv6 drops

show cef ipv6 exact-route

show cef ipv6 exceptions

show cef ipv6 external hardware

show cef ipv6 hardware

show cef ipv6 interface bgp-policy-statistics

show cef ipv6 interface

show cef ipv6 non-recursive

show cef ipv6 resources

show cef ipv6 summary

show cef ipv6 unresolved

show cef mpls adjacency

show cef mpls unresolved

show cef vrf

Cisco Express Forwarding Commands on Cisco IOS XR Software

This chapter describes the commands used to configure and monitor Cisco Express Forwarding (CEF) on Cisco IOS XR software.

For detailed information about CEF concepts, configuration tasks, and examples, see Cisco IOS XR IP Addresses and Services Configuration Guide.

clear adjacency ipv4

To clear the IPv4 CEF adjacency table, use the clear adjacency ipv4 command in EXEC mode.

clear adjacency statistics ipv4 [location node-id]
Syntax Description

location node-id

(Optional) Clears the IPv4 CEF adjacency table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

When you issue the clear adjacency statistics ipv4 command, entries in the adjacency table that reside on the route processor (RP) are removed and then repopulated.

If you do not specify a node with the location keyword and node-id argument, this command clears the CEF adjacency table on the interface on the route processor on which the command is issued.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear the IPv4 CEF adjacency table on the RP:
RP/0/RP0/CPU0:router# clear adjacency statistics ipv4
Related Commands

Command

Description

show adjacency

Displays the IPv4 CEF adjacency table.

clear adjacency statistics

To clear adjacency packet and byte counter statistics, use the clear adjacency statistics command in EXEC mode.

clear adjacency statistics [ipv4 [nexthop ipv4-address] | mpls | ipv6] [interface-type interface-instance | location node-id]
Syntax Description

ipv4

(Optional) Clears only IPv4 adjacency packet and byte counter statistics.

nexthop ipv4-address

(Optional) Clears adjacency statistics that are destined to the specified IPv4 nexthop.

mpls

(Optional) Clears only MPLS adjacency statistics.

ipv6

(Optional) Clears only IPv6 adjacency statistics.

interface-type

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

interface-instance

(Optional) Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

location node-id

(Optional) Clears detailed adjacency statistics for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

This command is useful for troubleshooting network connection and forwarding problems.

If you do not specify any of the optional keywords, all adjacency statistics are cleared for the node on which the command is issued.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear the IPv4 CEF adjacency statistics:
RP/0/RP0/CPU0:router# clear adjacency statistics
Related Commands

Command

Description

show adjacency

Displays the IPv4 CEF adjacency table.

clear cef ipv4 drops

To clear CEF IPv4 packet drop counters, use the clear cef ipv4 drops command in EXEC mode.

clear cef ipv4 drops [location node-id]
Syntax Description

location node-id

(Optional) Clears IPv4 packet drop counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command will clear IPv4 CEF drop counters only for the node on which the command is issued.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear IPv4 CEF drop counters for location 0/1/CPU0:
RP/0/RP0/CPU0:router# clear cef ipv4 drops location 0/1/CPU0
   Node: 0/1/CPU0
   Clearing CEF Drop Statistics 
Related Commands

Command

Description

show cef ipv4 drops

Displays IPv4 packet drop counters.

clear cef ipv4 exceptions

To clear IPv4 CEF exception packet counters, use the clear cef ipv4 exceptions command in EXEC mode.

clear cef ipv4 exceptions location node-id
Syntax Description

location node-id

Clears IPv4 CEF exception packet counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command will clear IPv4 CEF exception packet counters for all nodes.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear IPv4 CEF exception packets for all nodes:
RP/0/RP0/CPU0:router# clear cef ipv4 exceptions location 0/1/CPU0
Node: 0/1/CPU0
Clearing CEF Exception Statistics
Related Commands

Command

Description

show cef ipv4 exceptions

Displays IPv4 CEF exception packet counters.

clear cef ipv4 interface bgp-policy-statistics

To clear CEF IPv4 interface BGP policy statistics, use the clear cef ipv4 interface bpg-policy-statistics command in EXEC mode.

clear cef ipv4 interface type instance bpg-policy-statistics
Syntax Description

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.0

This command was introduced on the Cisco CRS-1.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

This command clears the Border Gateway Protocol (BGP) policy accounting counters for the specified interface.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear IPv4 CEF BGP policy statistics:
RP/0/RP0/CPU0:router# clear cef ipv4 interface MgmtEth 0/RP1/CPU0/0 bgp-policy-statistics
Related Commands

Command

Description

show cef ipv4 interface bgp-policy-statistics

Displays IPv4 interface BGP policy statistics.

clear cef ipv4 interface rpf-statistics

To clear CEF IPv4 interface reverse path forwarding (RPF) statistics, use the clear cef ipv4 interface rpf-statistics command in EXEC mode.

clear cef ipv4 interface type instance rpf-statistics [location node-id]
Syntax Description

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

location node-id

(Optional) Clears IPv6 packet drop counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The clear cef ipv4 interface rpf-statistics command clears the reverse path forwarding (RPF) counters for the specified interface.

Task ID

Task ID

Operations

cef

read

Examples

The following example shows how to clear IPv4 CEF RPF statistics for location 0/1/CPU0:
RP/0/RP0/CPU0:router# clear cef ipv4 interface pos 0/1/0/0 rpf-statistics location 
0/1/CPU0
clear cef ipv6 drops

To clear CEF IPv6 packet drop counters, use the clear cef ipv6 drop command in EXEC mode.

clear cef ipv6 drops [location node-id]
Syntax Description

location node-id

(Optional) Clears IPv6 packet drop counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command clears IPv6 CEF drop counters for all nodes.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear IPv6 CEF drop counters for all nodes:
RP/0/RP0/CPU0:router# clear cef ipv6 drops
Related Commands

Command

Description

show cef ipv6 drops

Displays IPv6 packet drop counters.

clear cef ipv6 exceptions

To clear IPv6 CEF exception packet counters, use the clear cef ipv6 exceptions command in EXEC mode.

clear cef ipv6 exceptions location node-id
Syntax Description

location node-id

Clears IPv6 CEF exception packet counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The location keyword was made mandatory.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command clears IPv6 CEF exception packet counters for all nodes.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear IPv6 CEF exception packets for all nodes:
RP/0/RP0/CPU0:router# clear cef ipv6 exceptions
Related Commands

Command

Description

show cef ipv6 exceptions

Displays IPv6 CEF exception packet counters.

clear cef ipv6 interface bgp-policy-statistics

To clear CEF IPv6 interface BGP policy statistics, use the clear cef ipv6 interface bpg-policy-statistics command in EXEC mode.

clear cef ipv6 interface type instance bpg-policy-statistics
Syntax Description

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.4.0

This command was introduced on the Cisco CRS-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. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The clear cef ipv6 interface bgp-policy-statistics command clears the Border Gateway Protocol (BGP) policy accounting counters for the specified interface.

Task ID

Task ID

Operations

basic-services

read, write

cef

read, write

Examples

The following example shows how to clear IPv4 CEF BGP policy statistics:
RP/0/RP0/CPU0:router# clear cef ipv6 interface MgmtEth 0/RP1/CPU0/0 bgp-policy-statistics
clear cef ipv6 interface rpf-statistics

To clear CEF IPv6 interface reverse path forwarding (RPF) statistics, use the clear cef ipv6 interface rpf-statistics command in EXEC mode.

clear cef ipv6 interface type instance rpf-statistics [location node-id]
Syntax Description

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

location node-id

(Optional) Clears IPv6 packet drop counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The clear cef ipv6 interface rpf-statistics command clears the reverse path forwarding (RPF) counters for the specified interface.

Task ID

Task ID

Operations

cef

read

Examples

The following example shows how to clear IPv4 CEF RPF statistics:
RP/0/RP0/CPU0:router# clear cef ipv6 interface MgmtEth 0/RP1/CPU0/0 rpf-statistics
ipv4 bgp policy accounting

To enable Border Gateway Protocol (BGP) policy accounting, use the ipv4 bgp policy accounting command in interface configuration mode. To disable BGP policy accounting, use the no form of this command.

ipv4 bgp policy accounting {input | output {destination-accounting [source-accounting] | source-accounting [destination-accounting]}}
no ipv4 bgp policy accounting {input | output {destination-accounting [source-accounting] | source-accounting [destination-accounting]}}
Syntax Description

input

Enables BGP policy accounting policy on the ingress IPv4 unicast interface.

output

Enables BGP policy accounting policy on the egress IPv4 unicast interface.

{destination-accounting [source-accounting] | source-accounting [destination-accounting]}

When you specify the ingress or egress interface, you must specify one of the following keywords:

•destination-accounting—Enables accounting policy on the basis of the destination address.

•source-accounting—Enables accounting policy on the basis of the source address.

After specifying destination-accounting you can optionally specify source-accounting, or after specifying source-accounting, you can optionally specify destination-accounting.

Defaults

There is no BGP policy accounting.

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.0

This command was introduced on the Cisco CRS-1.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

When you use the no form of the command, accounting is disabled for both the source and destination. To change accounting on either the destination or source address, reconfigure the ipv4 bgp policy accounting command specifying the destination-accounting or source-accounting keyword. In the following example, you want BGP policy accounting disabled on the source address after enabling source and destination address accounting earlier:
RP/0/RP0/CPU0:router(config-if)# ipv4 bgp policy accounting output destination-accounting
See the Cisco IOS XR Routing Configuration Guide for information about configuring a BGP policy. BGP accounting policy is based on community lists, autonomous system numbers, or autonomous system paths.

For BGP policy propagation to function, you must enable BGP.

To specify the accounting policy, the proper route policy configuration must be in place, matching specific BGP attributes using the set traffic-index command. In BGP router configuration mode, use the table-policy command to modify the accounting buckets when the IP routing table is updated with routes learned from BGP. To display accounting policy information, use the show cef ipv4 interface bgp-policy-statistics, show bgp policy, and show ip route bgp commands.

Task ID

Task ID

Operations

network

read, write

Examples

The following example shows how to configure BGP policy accounting:
RP/0/RP0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/RP0/CPU0:router(config-if)# ipv4 bgp policy accounting output source-accounting
Related Commands

Command

Description

show bgp policy

Displays information about BGP advertisements under a proposed policy.

show cef ipv4 interface bgp-policy-statistics

Displays IPv4 CEF BGP policy statistics.

show route bgp

Displays the current routes for BGP in the RIB.

route-policy

Defines a route policy.

table-policy

Applies a routing policy to routes being installed into the routing table.

ipv4 verify unicast source reachable-via

To enable IPv4 unicast Reverse Path Forwarding (RPF) checking, use the ipv4 verify unicast source reachable-via command in interface configuration mode. To disable unicast RPF, use the no form of this command.

ipv4 verify unicast source reachable-via {any | rx} [allow-default] [allow-self-ping]
no ipv4 verify unicast source reachable-via {any | rx} [allow-default] [allow-self-ping]
Syntax Description

any

Enables loose unicast RPF checking. If loose unicast RPF is enabled, a packet is not forwarded unless its source prefix exists in the routing table.

rx

Enables strict unicast RPF checking. If strict unicast RPF is enabled, a packet is not forwarded unless its source prefix exists in the routing table and the output interface matches the interface on which the packet was received.

allow-default

(Optional) Enables the matching of default routes. This option applies to both loose and strict RPF.

allow-self-ping

(Optional) Enables the router to ping out an interface.This option applies to both loose and strict RPF.

Defaults

IPv4 unicast RPF is disabled.

Command Modes

Interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The strict option information was added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Use the ipv4 verify unicast source reachable-via interface command to mitigate problems caused by malformed or forged (spoofed) IP source addresses that pass through a router. Malformed or forged source addresses can indicate denial-of-service (DoS) attacks based on source IP address spoofing.

When strict unicast RPF is enabled on an interface, the router examines all packets received on that interface. The router checks to make sure that the source address appears in the routing table and matches the interface on which the packet was received.

When loose unicast RPF is enabled on an interface, the router examines all packets received on that interface. The router checks to make sure that the source address can be reached through any of the router interfaces.

Task ID

Task ID

Operations

ipv4

read, write,

network

read, write

Examples

The following example shows how to configure strict RPF on POS interface 0/1/0/0:
RP/0/RP0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/RP0/CPU0:router(config-if)# ipv4 verify unicast source reachable-via rx
The following example shows how to configure loose RPF on POS interface 0/0/0/1.
RP/0/RP1/CPU0:ios(config)# interface pos 0/0/0/1
RP/0/RP1/CPU0:ios(config-if)# ipv4 verify unicast source reachable-via any
Related Commands

Command

Description

ipv6 verify unicast source reachable-via any

Enables loose IPv6 unicast RPF checking.

ipv6 bgp policy accounting

To enable Border Gateway Protocol (BGP) policy accounting, use the ipv6 bgp policy accounting command in interface configuration mode. To disable BGP policy accounting, use the no form of this command.

ipv6 bgp policy accounting {input | output {destination-accounting [source-accounting] | source-accounting [destination-accounting]}}
no ipv6 bgp policy accounting {input | output {destination-accounting [source-accounting] | source-accounting [destination-accounting]}}
Syntax Description

input

Enables BGP policy accounting policy on the ingress IPv6 unicast interface.

output

Enables BGP policy accounting policy on the egress IPv6 unicast interface.

{destination-accounting [source-accounting] | source-accounting [destination-accounting]}

When you specify the ingress or egress interface, you must specify one of the following keywords:

•destination-accounting—Enables accounting policy on the basis of the destination address.

•source-accounting—Enables accounting policy on the basis of the source address.

After specifying destination-accounting, you can optionally specify source-accounting or, after specifying source-accounting, you can optionally specify destination-accounting.

Defaults

There is no BGP policy accounting.

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

When you use the no form of the command, accounting is disabled for both the source and destination. To change accounting on either the destination or source address, reconfigure the ipv6 bgp policy accounting command, specifying the destination-accounting or source-accounting keyword. In the following example, you want BGP policy accounting disabled on the source address after enabling source and destination address accounting earlier:
RP/0/RP0/CPU0:router(config-if)# ipv6 bgp policy accounting output destination-accounting
See the Cisco IOS XR Routing Configuration Guide for information about configuring a BGP policy. BGP accounting policy is based on community lists, autonomous system numbers, or autonomous system paths.

For BGP policy propagation to function, you must enable BGP.

To specify the accounting policy, the proper route policy configuration must be in place matching specific BGP attributes using the set traffic-index command. In BGP router configuration mode, use the table-policy command to modify the accounting buckets when the IP routing table is updated with routes learned from BGP. To display accounting policy information, use the show cef ipv4 interface bgp-policy-statistics, show bgp policy, and show ip route bgp commands.

Task ID

Task ID

Operations

network

read, write

Examples

The following example shows how to configure BGP policy accounting:
RP/0/RP0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/RP0/CPU0:router(config-if)# ipv6 bgp policy accounting output source-accounting
Related Commands

Command

Description

show bgp policy

Displays information about BGP advertisements under a proposed policy.

show cef ipv6 interface bgp-policy-statistics

Displays IPv6 CEF BGP policy statistics.

show route bgp

Displays the current routes for BGP in the RIB.

route-policy

Defines a route policy.

table-policy

Applies a routing policy to routes being installed into the routing table.

ipv6 verify unicast source reachable-via any

To enable loose IPv6 unicast Reverse Path Forwarding (RPF) checking, use the ipv6 verify unicast source reachable-via any command in interface configuration mode. To disable loose IPv6 unicast RPF checking, use the no form of this command.

ipv6 verify unicast source reachable-via {any | rx} [allow-default] [allow-self-ping]
no ipv6 verify unicast source reachable-via {any | rx} [allow-default] [allow-self-ping]
Syntax Description

any

Enables loose unicast RPF checking. If loose unicast RPF is enabled, a packet is not forwarded unless its source prefix exists in the routing table.

rx

Enables strict unicast RPF checking. If strict unicast RPF is enabled, a packet is not forwarded unless its source prefix exists in the routing table and the output interface matches the interface on which the packet was received.

allow-default

(Optional) Enables the matching of default routes. This option applies to both loose and strict RPF.

allow-self-ping

(Optional) Enables the router to ping out an interface.This option applies to both loose and strict RPF.

Defaults

Loose IPv6 unicast RPF is disabled.

Command Modes

Interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The keywords any, rx, allow-default, and allow-self-ping were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

network

read, write

ipv6

read, write

Examples

The following example shows how to enable loose RPF checking on POS interface 0/1/0/0:
RP/0/RP0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/RP0/CPU0:router(config-if)# ipv6 verify unicast source reachable-via any
Related Commands

Command

Description

ipv4 verify unicast source reachable-via

Enables IPv4 unicast RPF checking.

rp mgmtethernet forwarding

To enable switching from the line card to the route processor Management Ethernet interfaces, use the rp mgmtethernet forwarding command in global configuration mode. To disable switching from the modular services card to the route processor Management Ethernet interfaces, use the no form of this command.

rp mgmtethernet forwarding
no rp mgmtethernet forwarding
Syntax Description

This command has no arguments or keywords.

Defaults

Switching is disabled.

Command Modes

Global configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

This command is not supported on theCisco XR 12000 Series Router.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read, write

Examples

The following example shows how to enable switching from the modular services card to the RP Management Ethernet interfaces:
RP/0/RP0/CPU0:router(config)# rp mgmtethernet forwarding
show adjacency

To display CEF adjacency table information, use the show adjacency command in EXEC mode.

show adjacency [ipv4 [nexthop ipv4-address] | mpls | ipv6] [interface-type interface-instance] [remote] [detail] [location node-id]
Syntax Description

ipv4

(Optional) Displays only IPv4 adjacencies.

nexthop ipv4-address

(Optional) Displays adjacencies that are destined to the specified IPv4 nexthop.

mpls

(Optional) Displays only MPLS adjacencies.

ipv6

(Optional) Displays only IPv6 adjacencies.

interface-type

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

interface-instance

Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

remote

(Optional) Displays only remote adjacencies. A remote adjacency is an internal adjacency used to forward packets between line cards.

detail

(Optional) Displays detailed adjacency information, including Layer 2 information.

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

This command is used to verify that an adjacency exists for a connected device, that the adjacency is valid, and that the MAC header rewrite string is correct.

If you do not specify a node with the location keyword and node-id argument, this command displays the CEF adjacency table for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from show adjacency command with the location keyword specified:
RP/0/RP0/CPU0:router# show adjacency location 0/0/CPU0
Interface                  Address                 Version  Refcount  Protocol
POS0/0/1/2                 (src mac only)                6         1     ipv4
POS0/0/1/2                 point to point                7     100004
POS0/0/1/2                 (interface)                   3         1
The following is sample output from the show adjacency command with the detail and location keywords specified:
RP/0/RP0/CPU0:router# show adjacency ipv4 POS 0/0/0/2 detail location 0/0/CPU0
Interface                  Address                 Version  Refcount  Protocol
POS0/0/0/2                 point to point                7    100004     ipv4
                           0f000800
                           mtu: 4470, flags 0 0 40000000
                           0 packets, 0 bytes
                           0xffffffff
The following is sample output from the show adjacency ipv4 nexthop command with the detail and location keywords specified:
RP/0/RP0/CPU0:router: show adjacency ipv4 nexthop 10.10.10.1 detail location 0/3/CPU0 
Interface                  Address                 Version  Refcount  Protocol
POS0/3/1/0             10.10.10.1                   11         6     ipv4
                           000c86f33d330800453a21c10800
                           mtu: 1500, flags 0 0 40000000
                           0 packets, 0 bytes
                           0xffffffff
Table 9 describes the significant fields shown in the display.

Table 9 show adjacency Field Descriptions

Field

Description

Interface

Outgoing interface associated with the adjacency.

Address

Address can represent one of these addresses:

•Next hop IPv4 or IPv6 address

•Point-to-Point address

Information in parentheses indicates different types of adjacency.

Version

Version number of the adjacency. Updated whenever the adjacency is updated.

Refcount

Number of references to this adjacency.

Protocol

Protocol for which the adjacency is associated.

0f000800 and 000c86f33d330800453a21c10800

Layer 2 encapsulation string.

mtu

Value of the MTU¹.

flags

Internal field.

packets

Number of packets going through the adjacency.

bytes

Number of bytes going through the adjacency.

¹MTU = maximum transmission unit

Related Commands

Command

Description

clear adjacency ipv4

Clears the IPv4 CEF adjacency table.

show cef ipv4

To display the IPv4 CEF table, use the show cef ipv4 command in EXEC mode.

show cef [vrf vrf-name] ipv4 [prefix [mask] | interface-type interface-instance] [detail] [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

prefix

(Optional) Longest matching CEF entry for the specified IPv4 destination prefix.

mask

(Optional) Exact CEF entry for the specified IPv4 prefix and mask.

interface-type

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

interface-instance

Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

detail

(Optional) Displays full CEF entry information.

location node-id

(Optional) Displays the IPv4 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays the CEF table on the node in which the command is issued. Otherwise, the command is effective on the node specified by the location node-id keyword and argument.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 command:
RP/0/RP0/CPU0:router# show cef ipv4 
Prefix              Next Hop            Interface
0.0.0.0/0           12.25.0.1           MgmtEth0/RP1/CPU0/0
0.0.0.0/32          broadcast
12.25.0.0/16        attached            MgmtEth0/RP1/CPU0/0
12.25.12.10/32      receive             MgmtEth0/RP1/CPU0/0
12.25.13.12/32      12.25.13.12         MgmtEth0/RP1/CPU0/0
12.25.16.11/32      12.25.16.11         MgmtEth0/RP1/CPU0/0
12.25.22.10/32      12.25.22.10         MgmtEth0/RP1/CPU0/0
12.25.26.10/32      12.25.26.10         MgmtEth0/RP1/CPU0/0
12.25.41.2/32       12.25.41.2          MgmtEth0/RP1/CPU0/0
12.25.41.5/32       12.25.41.5          MgmtEth0/RP1/CPU0/0
12.25.42.5/32       12.25.42.5          MgmtEth0/RP1/CPU0/0
12.25.44.15/32      12.25.44.15         MgmtEth0/RP1/CPU0/0
12.25.55.2/32       12.25.55.2          MgmtEth0/RP1/CPU0/0
12.25.255.255/32    12.25.255.255       MgmtEth0/RP1/CPU0/0
224.0.0.0/4         0.0.0.0
224.0.0.1/32        0.0.0.0
255.255.255.255/32  broadcast
Table 10 describes the significant fields shown in the display.

Table 10 show cef ipv4 Field Descriptions

Field

Description

Prefix

Prefix in the IPv4 CEF table.

Next Hop

Next hop of the prefix.

Interface

Interface associated with the prefix.

Related Commands

Command

Description

show cef ipv6

Displays the IPv6 CEF table.

show cef ipv4 adjacency

To display IPv4 CEF adjacency status and configuration information, use the show cef ipv4 adjacency command in EXEC mode.

show cef [vrf vrf-name] ipv4 adjacency [interface-type interface-instance] [location node-id] [detail] [discard] [glean] [null] [punt] [remote]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

interface-type

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

interface-instance

Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

detail

(Optional) Displays the detailed adjacency information.

discard

(Optional) Filters out and displays only the discarded adjacency information.

glean

(Optional) Filters out and displays only the glean adjacency information.

null

(Optional) Filters out and displays only the adjacency information.

punt

(Optional) Filters out and displays only the punt adjacency information.

remote

(Optional) Filters out and displays only the remote adjacency information.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, the show cef ipv4 adjacency command displays the CEF adjacency table for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from show cef ipv4 adjacency command:
RP/0/RP1/CPU0:ios# show cef ipv4 adjacency MgmtEth 0/RP1/CPU0/0
Display protocol is ipv4
Interface    Address                                         Type    Refcount
Mg0/RP1/CPU0/0Prefix: 12.25.0.3/32                            local   2
             Adjacency: PT:0x782a2900 12.25.0.3/32
             Interface: Mg0/RP1/CPU0/0
             MAC: 00.d0.02.75.ab.fd.00.11.93.ef.e3.50.08.00
             Interface Type: 0x8, Base Flags: 0x1
             Dependent adj type: remote
             Dependent adj intf: Mg0/RP1/CPU0/0
Mg0/RP1/CPU0/0Prefix: 0.24.0.32/32                            remote  6
             Adjacency: PT:0x782a2b58
             Interface: Mg0/RP1/CPU0/0
             MAC: 28.4e.4f.4e.45.29
             Interface Type: 0x8, Base Flags: 0x0
Table 11 describes the significant fields shown in the display.

Table 11 show cef ipv4 adjacency Field Descriptions

Field

Description

Interface

Interface associated with the prefix.

Address

Prefix address information.

Type

Type of adjacency, can be either local or remote.

Refcount

Number of times the adjacency is referenced by other routers.

Related Commands

Command

Description

show cef ipv6 adjacency

Displays CEF IPv6 adjacency status and configuration information.

show cef ipv4 adjacency hardware

To display IPv4 CEF adjacency hardware status and configuration information, use the show cef ipv4 adjacency hardware command in EXEC mode.

show cef [vrf vrf-name] ipv4 adjacency hardware {egress | ingress [detail | discard | drop | glean | location node-id | null | punt | remote]}
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

egress

Displays information from the egress packet switch exchange (PSE) file.

ingress

Displays information from the ingress packet switch exchange (PSE) file.

detail

(Optional) Displays full details.

discard

(Optional) Displays the discard adjacency information.

drop

(Optional) Displays the drop adjacency information.

glean

(Optional) Displays the glean adjacency information.

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

null

(Optional) Displays the null adjacency information.

punt

(Optional) Displays the punt adjacency information.

remote

(Optional) Displays the remote adjacency information.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 adjacency hardware command:
RP/0/RP0/CPU0:router# show cef ipv4 adjacency hardware
Interface    Address                                         Type    Refcount
Mg0/RP0/CPU0/0                                                special 4
             Interface: Mg0/RP0/CPU0/0 Type:  glean
             Interface Type: 0x8, Base Flags: 0x4400
             Dependent adj type: remote
             Dependent adj intf: Mg0/RP0/CPU0/0
Mg0/RP0/CPU0/0Prefix: 64.102.12.47/32                         local   3
             Adjacency: PT:0x78f5c708 64.102.12.47/32
             Interface: Mg0/RP0/CPU0/0
             MAC: 00.30.f2.f2.10.38.00.11.93.ef.e8.e6.08.00
             Interface Type: 0x8, Base Flags: 0x1
             Dependent adj type: remote
             Dependent adj intf: Mg0/RP0/CPU0/0
Table 12 describes the significant fields shown in the display.

Table 12 show cef ipv4 adjacency hardware Field Descriptions

Field

Description

Interface

Interface associated with the prefix.

Address

Prefix address information.

Type

Type of adjacency, can be either local or remote.

Refcount

Number of times the adjacency is referenced by other routers.

Related Commands

Command

Description

show cef ipv6 adjacency hardware

Displays IPv6 CEF adjacency hardware status and configuration information

show cef ipv4 drops

To display IPv4 CEF table packet drop counters, use the show cef ipv4 drops command in EXEC mode.

show cef [vrf vrf-name] ipv4 drops [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays IPv4 CEF table packet drop counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

A packet might be dropped from the IPv4 CEF table because of unresolved CEF entries, unsupported features, absence of route information, absence of adjacency information, or an IP checksum error.

If you do not specify a node with the location keyword and node-id argument, this command displays IPv4 CEF packet drop counters for all nodes.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 drops for location command:
RP/0/RP0/CPU0:router# show cef ipv4 drops 
CEF Drop Statistics
Node: 0/0/CPU0
  Unresolved drops     packets :               0
  Unsupported drops    packets :               0
  Null0 drops          packets :               0
  No route drops       packets :               0
  No Adjacency drops   packets :               0
  Checksum error drops packets :               0
  RPF drops            packets :               0
  RPF suppressed drops packets :               0
  RP destined drops    packets :               0
Table 13 describes the significant fields shown in the display.

Table 13 show cef ipv4 drop Field Descriptions

Field

Description

Unresolved drops

Drops due to unresolved routes.

Unsupported drops

Drops due to an unsupported feature.

No route drops

Number of packets dropped because there were no routes to the destination.

No Adjacency drops

Number of packets dropped because there were no adjacencies established.

Checksum error drops

Drops due to IPv4 checksum error.

RPF drops

Drops due to IPv4 unicast RPF¹.

RPF suppressed drops

Drops suppressed due to IPv4 unicast RPF.

RP destined drops

Drops destined for the router.

¹RPF = Reverse Path Forwarding

Related Commands

Command

Description

clear cef ipv4 drops

Clears IPv4 CEF packet drop counters.

clear cef ipv6 drops

Clears IPv6 CEF packet drop counters.

show cef ipv4 exact-route

To display an IPv4 CEF exact route, use the show cef ipv4 exact-route command in EXEC mode.

show cef [vrf vrf-name] ipv4 exact-route {source-address destination-address} [detail | location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

source-address

The IPv4 source address in x.x.x.x format.

destination-address

The IPv4 destination address in x.x.x.x format.

detail

(Optional) Displays full CEF entry information.

location node-id

(Optional) Displays the IPv4 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced on the Cisco CRS-1.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 exact-route command:
RP/0/RP0/CPU0:router# show cef ipv4 exact-route 10.1.1.1 10.1.1.2 detail
0.0.0.0/0, version 432, proxy default, internal 0x2000201[1]
 Prefix Len 0, traffic index 0, precedence routine (0)
   via MgmtEth0/RP1/CPU0/0
Table 14 describes the significant fields shown in the display.

Table 14 show cef ipv4 exact-route Field Descriptions

Field

Description

Prefix

Prefix in the IPv4 CEF table.

Next Hop

Next hop of the prefix

Interface

Interface associated with the prefix

Related Commands

Command

Description

clear cef ipv4 exceptions

Displays IPv4 CEF exception packet counters.

show cef ipv4 exceptions

To display IPv4 CEF exception packet counters, use the show cef ipv4 exceptions command in EXEC mode.

show cef [vrf vrf-name] ipv4 exceptions [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays CEF exception packet counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

CEF exception packets are those packets that have been sent from the hardware to the software because they require additional handling. The types of IPv4 CEF exception packets are displayed in the command's output and are defined.

If you do not specify a node with the location keyword and node-id argument, this command displays IPv4 CEF exception packet counters on all nodes.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 exceptions command:
RP/0/RP0/CPU0:router# show cef ipv4 exceptions
CEF Exception Statistics
Node: 0/0/CPU0
  Slow encap  packets :               0
  Redirect    packets :               0
  Receive     packets :          306404
  Broadcast   packets :               0
  IP options  packets :               0
  TTL expired packets :               0
  Fragmented  packets :               0
Node: 0/1/CPU0
  Slow encap  packets :               0
  Redirect    packets :               0
  Receive     packets :               0
  Broadcast   packets :               0
  IP options  packets :               0
  TTL expired packets :               0
  Fragmented  packets :               0
Node: 0/2/CPU0
  Slow encap  packets :               0
  Redirect    packets :               0 Receive     packets :               0
  Broadcast   packets :               0
  IP options  packets :               0
  TTL expired packets :             314
  Fragmented  packets :               0
Node: 0/3/CPU0
  Slow encap  packets :               0
  Redirect    packets :               0
  Receive     packets :               0
  Broadcast   packets :               0
  IP options  packets :               0
  TTL expired packets :               0
  Fragmented  packets :               0
Table 15 describes the significant fields shown in the display.

Table 15 show cef ipv4 exceptions Field Descriptions

Field

Description

Slow encap

Number of packets requiring special processing during encapsulation.

Redirect

Number of ICMP¹ redirect messages sent.

Receive

Number of packets destined to the router.

Broadcast

Number of broadcasts received.

IP options

Number of IP option packets.

TTL expired

Number of packets with expired TTLs².

Fragmented

Number of packets that have been fragmented.

¹ICMP = internet control message protocol

²TTL = time to live

Related Commands

Command

Description

clear cef ipv4 exceptions

Clears IPv4 CEF exception packet counters.

clear cef ipv6 exceptions

Clears IPv6 CEF exception packet counters.

show cef ipv4 external hardware

To display information related to IPv4 CEF external clients, use the show cef ipv4 external hardware command in EXEC mode.

show cef [vrf vrf-name] ipv4 external hardare {ingress | detail} location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

ingress

Display information read from the ingress packet switch exchange (PSE).

detail

Displays full information about CEF external clients.

location node-id

(Optional) Displays CEF exception packet counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The show cef ipv4 external hardware command displays every prefix that an external client is interested in as well as the hardware information from the platform.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output for the show cef ipv4 external hardare command:
RP/0/RP0/CPU0:router# show cef vrf_1 external hardare ingress location 0/1/0
Client Name       : l2fib_mgr
Interest type     : EOS0 LDI updates
Prefix            : 3.3.3.3/32
Number of notifs  : 1
State             : resolved, mismatch, cached plat context, in retry
Via               : drop
    Load distribution: 0 (refcount 0)
    Hash  OK  Interface                 Address
    0     Y   Unknown                   drop           
    INGRESS External CLient Load info:
Total Recursive Paths 0
    TLU1 0x00004610 nexthop: 0.0.0.0
    TLU1 ENTRY        0
     SW: 0x00000002 00010000 00000000 00000100
     HW: 0x00000002 00010000 00000000 00000100
    local:                0x0    drop:                0x1
    next ptr:     0x00010000
    num of entries:    1
    Recursive next-hop:   0.0.0.0
Table 16 describes the significant fields shown in the display.

Table 16 show cef ipv4 external hardware Field Descriptions

Field

Description

Client Name

Process name of the client (for example, l2fib_mgr).

Interest type

Client interest type, which may be:

•IP reachability notify

•EOS0 LDI updates

•IP LDI updates

•6VPE MPLS nexthop reachability

•6VPE IP tunnel nexthop reachability

Prefix

Client prefix. If the interest type is 6VPE, you will see Tunnel Id for the outgoing tunnel if the prefix length is not 0.

Number of notifs

Number of times the client has been notified about this prefix.

State

Client state, which may be:

•resolved/unresolved

•mismatch

•path

•notif pending

•cached plat context

•in retry

•stale

Via

Next hop for this prefix.

Total Recursive Paths

Number of buckets for recursive loadinfo. This is the number of paths available for a prefix learnt through BGP, or static recursive routes.

TLU1

Recursive loadinfo parameters.

SW/HW

HW: Information programmed in hardware.

SW: Software shadow information.

local

Entry used to forward this traffic type only (if this bit is set). Note that this bit is used only for VPLS broadcast and multicast traffic forwarding.

next ptr

Next memory location for hardware lookup.

num of entries

Number of buckets for non-recursive loadinfo. This is the number of paths learned through IGP or static non-recursive routers.

Related Commands

Command

Description

show cef ipv6 external hardware

To display information related to IPv6 CEF external clients.

show cef ipv4 hardware

To display IPv4 CEF hardware status and configuration information, use the show cef ipv4 hardware command in EXEC mode.

show cef [vrf vrf-name] ipv4 hardware {egress | ingress [detail | location node-id]}
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

egress

Displays information from the egress packet switch exchange (PSE) file.

ingress

Displays information from the ingress packet switch exchange (PSE) file.

detail

(Optional) Displays full details.

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 hardware egress command:
RP/0/RP0/CPU0:router# show cef ipv4 hardware egress 
Prefix              Next Hop            Interface
0.0.0.0/0           172.29.52.1         <recursive> 
0.0.0.0/32          broadcast
10.1.1.1/32         receive             Loopback0
10.2.2.2/32         10.12.24.2          Bundle-POS24
10.6.6.6/32         10.16.8.6           GigabitEthernet0/6/5/2
10.7.7.7/32         10.12.24.2          Bundle-POS24
10.11.11.11/32      10.12.8.2           POS0/1/0/1
10.12.4.0/24        attached            POS0/6/4/5
10.12.4.0/32        broadcast           POS0/6/4/5
10.12.4.1/32        receive             POS0/6/4/5
10.12.4.255/32      broadcast           POS0/6/4/5
10.12.8.0/24        attached            POS0/1/0/1
10.12.8.0/32        broadcast           POS0/1/0/1
10.12.8.1/32        receive             POS0/1/0/1
10.12.8.255/32      broadcast           POS0/1/0/1
10.12.12.0/24       attached            POS0/6/0/1
Table 17 describes the significant fields shown in the display.

Table 17 show cef ipv4 hardware egress Field Descriptions

Field

Description

Prefix

Nonrecursive prefixes detected on the node.

Next Hop

Routing next hop.

Interface

Interface associated with the nonrecursive prefix.

Related Commands

Command

Description

show cef ipv6 hardware

Displays CEF IPv6 hardware status and configuration information.

show cef ipv4 interface

To display IPv4 Cisco Express Forwarding (CEF)-related information for an interface, use the show cef ipv4 interface command in EXEC mode.

show cef [vrf vrf-name] ipv4 interface type instance [detail] [rpf-statistics] [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

detail

(Optional) Displays detailed CEF information for all the interfaces on the node in which the command is issued.

rpf-statistics

(Optional) Displays the unicast reverse path forwarding (RPF) statistics.

location node-id

(Optional) Displays IPv4 CEF-related information for an interface. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, the show cef ipv4 interface rpf-statistics command displays the CEF-related information for the interface on the route processor.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 interface command:
RP/0/RP0/CPU0:router# show cef ipv4 interface MgmtEth 0/RP0/CPU0/0 
MgmtEth0/0/CPU0/0 is up (if_handle 0x01000100)
  Forwarding is enabled
  ICMP redirects are never sent
  IP MTU 1500, TableId 0xe0000000
  Reference count 2
Table 18 describes the significant fields shown in the display.

Table 18 show cef ipv4 interface Field Descriptions

Field

Description

MgmtEth 0/RP0/CPU0/0 is up

Status of the interface.

if_handle

Internal interface handle.

Forwarding is enabled

Indicates that CEF is enabled.

ICMP redirects are always sent or never sent

Indicates whether ICMP¹ redirect messages should be sent. By default, ICMP redirect messages are always sent.

IP MTU

Value of the IPv4 MTU² size set on the interface.

Reference count

Internal reference counter.

¹ICMP = internet control message protocol

²MTU = maximum transmission unit

Related Commands

Command

Description

show cef ipv6 interface

Displays IPv6 CEF-related information for an interface.

show cef ipv4 interface bgp-policy-statistics

To display IPv4 Cisco Express Forwarding (CEF)-related BGP policy statistics information for an interface, use the show cef ipv4 interface bgp-policy-statistics command in EXEC mode.

show cef [vrf vrf-name] ipv4 interface type instance bgp-policy-statistics
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.0

This command was introduced on the Cisco CRS-1.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

This command displays all the configured BGP policy counters for the specified interface.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 interface bgp-policy-statistics command:
RP/0/RP0/CPU0:router# show cef ipv4 interface TenGigE 0/2/0/4 bgp-policy-statistics
TenGigE0/2/0/4 is up
Input BGP policy accounting on src IP address enabled
buckets packets  bytes
0       184054   10157753
6       65688590 4204069760
7       65688590 4204069760
8       65688654 4204073856
9       65688656 4204073984
10      65688655 4204073920
30      32844290 1510837340
31      32844291 1510837386
32      32844294 1510837524
33      32844296 1510837616
34      32844298 1510837708
35      32844302 1510837892
36      32844302 1510837892
37      32844303 1510837938
38      32844305 1510838030
39      32844307 1510838122
Output BGP policy accounting on dst IP address enabled
buckets packets bytes
0       754     43878
Output BGP policy accounting on src IP address enabled
buckets packets bytes
0       857     51706
Table 19 describes the significant fields shown in the display.

Table 19 show cef ipv4 interface bgp-policy-statistics Field Descriptions

Field

Description

TenGigE 0/2/0/4 is up

Status of the interface.

Input BGP policy accounting on src IP address enabled

Enabled BGP policy accounting features.

buckets

Traffic index.

packets

Number of packets counted in the bucket.

bytes

Number of bytes counted in the bucket.

Related Commands

Command

Description

show cef ipv6 interface bgp-policy-statistics

Displays IPv6 CEF-related BGP policy statistics information for an interface.

show cef ipv4 non-recursive

To display the IPv4 nonrecursive prefix entries in the IPv4 CEF table, use the show cef ipv4 non-recursive command in EXEC mode.

show cef [vrf vrf-name] ipv4 non-recursive [detail] [hardware egress | ingress] [interface-type interface-instance] [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

detail

(Optional) Displays detailed information about nonrecursive prefix entries in the IPv4 CEF table.

hardware

(Optional) Displays detailed information about hardware.

egress

(Optional) Displays egress packet switch exchange (PSE).

ingress

(Optional) Displays ingress packet switch exchange (PSE).

interface-type

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

interface-instance

(Optional) Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

location node-id

(Optional) Displays the IPv4 nonrecursive prefix entries in the IPv4 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, the output displays the IPv4 CEF nonrecursive routes for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 non-recursive command:
RP/0/RP0/CPU0:router# show cef ipv4 non-recursive                   
Prefix              Next Hop            Interface
0.0.0.0/0           12.8.0.1
0.0.0.0/32          broadcast
12.8.0.0/16         attached            MgmtEth0/0/CPU0/0
12.8.0.0/32         broadcast           MgmtEth0/0/CPU0/0
12.8.0.1/32         12.8.0.1            MgmtEth0/0/CPU0/0
12.8.0.2/32         12.8.0.2            MgmtEth0/0/CPU0/0
12.8.0.3/32         12.8.0.3            MgmtEth0/0/CPU0/0
12.8.16.10/32       12.8.16.10          MgmtEth0/0/CPU0/0
12.8.16.30/32       12.8.16.30          MgmtEth0/0/CPU0/0
12.8.16.40/32       12.8.16.40          MgmtEth0/0/CPU0/0
12.8.28.8/32        12.8.28.8           MgmtEth0/0/CPU0/0
12.8.28.101/32      12.8.28.101         MgmtEth0/0/CPU0/0
12.8.28.103/32      12.8.28.103         MgmtEth0/0/CPU0/0
12.8.28.104/32      12.8.28.104         MgmtEth0/0/CPU0/0
12.8.28.106/32      receive             MgmtEth0/0/CPU0/0
12.8.29.113/32      12.8.29.113         MgmtEth0/0/CPU0/0
12.8.29.118/32      12.8.29.118         MgmtEth0/0/CPU0/0
12.8.29.140/32      12.8.29.140         MgmtEth0/0/CPU0/0
12.8.33.101/32      12.8.33.101         MgmtEth0/0/CPU0/0
12.8.33.103/32      12.8.33.103         MgmtEth0/0/CPU0/0
12.8.33.105/32      12.8.33.105         MgmtEth0/0/CPU0/0
12.8.33.110/32      12.8.33.110         MgmtEth0/0/CPU0/0
12.8.57.1/32        12.8.57.1           MgmtEth0/0/CPU0/0
12.8.255.255/32     broadcast           MgmtEth0/0/CPU0/0
12.29.31.2/32       12.29.31.2          MgmtEth0/0/CPU0/0
223.255.0.0/16      attached            MgmtEth0/0/CPU0/0
223.255.254.254/32  223.255.254.254     MgmtEth0/0/CPU0/0
224.0.0.0/4         0.0.0.0
224.0.0.0/24        receive
255.255.255.255/32  broadcast
Table 20 describes the significant fields shown in the display.

Table 20 show cef ipv4 non-recursive Field Descriptions

Field

Description

Prefix

Nonrecursive prefixes detected on the node.

Next Hop

Routing next hop.

Interface

Interface associated with the nonrecursive prefix.

Related Commands

Command

Description

show cef ipv6 non-recursive

Displays IPv6 nonrecursive prefix entries in the CEF table.

show cef ipv4 resources

To display IPv4 CEF resource availability status, use the show cef ipv4 resources command in EXEC mode.

show cef ipv4 resources [detail] [location node-id]
Syntax Description

detail

(Optional) Displays detailed information resources listed in the IPv4 CEF table.

location node-id

(Optional) Displays the IPv4 resource entries in the IPv4 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, the output displays the IPv4 CEF nonrecursive routes for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 resource command:
RP/0/RP0/CPU0:router# show cef ipv4 resource detail
CEF resource availability summary state: GREEN
  ipv4 shared memory resource:
        CurrMode GREEN, CurrUtil 0%
        CurrAvail 1874526208 bytes, MaxAvail 1875693568 bytes
  ipv6 shared memory resource:
        CurrMode GREEN, CurrUtil 0%
        CurrAvail 1874591744 bytes, MaxAvail 1875365888 bytes
  mpls shared memory resource:
        CurrMode GREEN, CurrUtil 0%
        CurrAvail 1874407424 bytes, MaxAvail 1875038208 bytes
  common shared memory resource:
        CurrMode GREEN, CurrUtil 0%
        CurrAvail 1873215488 bytes, MaxAvail 1874972672 bytes
  TABLE hardware resource: GREEN
  LEAF hardware resource: GREEN
  LOADINFO hardware resource: GREEN
  NHINFO hardware resource: GREEN
  LABEL_INFO hardware resource: GREEN
  IDB hardware resource: GREEN
  FRR_NHINFO hardware resource: GREEN
  LDSH_ARRAY hardware resource: GREEN
  RSRC_MON hardware resource: GREEN
Table 21 describes the significant fields shown in the display.

Table 21 show cef ipv4 non-recursive Field Descriptions

Field

Description

Prefix

Nonrecursive prefixes detected on the node.

Next Hop

Routing next hop.

Interface

Interface associated with the nonrecursive prefix.

Related Commands

Command

Description

show cef ipv6 resources

Displays IPv6 CEF resource availability status.

show cef ipv4 summary

To display a summary of the IPv4 CEF table, use the show cef ipv4 summary command in EXEC mode.

show cef [vrf vrf-name] ipv4 summary [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays a summary of the IPv4 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays a summary of the IPv4 CEF table for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 summary command:
RP/0/RP0/CPU0:router# show cef ipv4 summary 
Router ID is 0.0.0.0
IP CEF with switching (Table Version 43)
  tableid 0xe0000000, vrfid 0x60000000, vrfname unknown, vrid 0x20000000, flags
0x1
  34 routes, 0 reresolve, 0 unresolved (0 old, 0 new)
  0 load sharing elements, 0 bytes, 0 references
  0 CEF route update drops, 9 revisions of existing leaves
  Resolution Timer: 15s
  9 prefixes modified in place
Adjacency Table has 26 adjacencies
  2 incomplete adjacencies
Table 22 describes the significant fields shown in the display.

Table 22 show cef ipv4 summary Field Descriptions

Field

Description

Table Version

Version of the CEF table.

tableid

Table identification number.

vrfid

VPN routing and forwarding (VRF) identification (vrfid) number.

vrfname

VRF name.

vrid

Virtual router identification (vrid) number.

flags

Option value for the table

routes

Total number of routes.

reresolve

Total number of routes being reresolved.

unresolved (x old, x new)

Number of routes not yet resolved.

load sharing elements

Total number of internal load-sharing data structures.

bytes

Total memory used by internal load sharing data structures.

references

Total reference count of all internal load sharing data structures.

CEF resets

Number of CEF table resets.

revisions of existing leaves

Number of updates to existing prefixes.

Exponential (currently xs, peak xs)

Currently not used.

prefixes modified in place

Prefixes modified in place.

Adjacency Table has x adjacencies

Total number of adjacencies.

x incomplete adjacency

Total number of incomplete adjacencies.

Related Commands

Command

Description

show cef ipv6 summary

Displays a summary of the IPv6 CEF table.

show cef ipv4 unresolved

To display unresolved routes in the IPv4 CEF table, use the show cef ipv4 unresolved command in EXEC mode.

show cef [vrf vrf-name] ipv4 unresolved [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays the unresolved routes in the IPv4 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, the output displays the unresolved routes for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 unresolved command when an unresolved route is detected:
RP/0/RP0/CPU0:router# show cef ipv4 unresolved
Prefix              Next Hop            Interface
3.3.3.3             2.2.2.2                ?
Table 23 describes the significant fields shown in the display.

Table 23 show cef ipv4 unresolved Field Descriptions

Field

Description

Prefix

Prefix of the unresolved CEF.

Next Hop

Next hop of the unresolved CEF.

Interface

Next hop interface. A question mark (?) indicates that the interface has not been resolved.

Related Commands

Command

Description

show cef ipv6 unresolved

Displays unresolved routes in the IPv6 CEF table.

show cef ipv6

To display the IPv6 CEF table, use the show cef ipv6 command in EXEC mode.

show cef [vrf vrf-name] ipv6 [interface-type interface-number | ipv6-prefix/prefix-length] [detail] [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

interface-type interface-number

(Optional) IPv6 prefixes going through the specified next hop interface.

ipv6-prefix/prefix-length

(Optional) Longest prefix entry in the CEF table matching the specified IPv6 prefix and prefix length.

detail

(Optional) Displays detailed IPv6 CEF table information.

location node-id

(Optional) Displays the IPv6 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays the IPv6 CEF table for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 command:
RP/0/RP0/CPU0:router# show cef ipv6
::/0
::/128
  drop
::1/128
  loopback
66::4/128
  receive    Loopback0
2222::/64
  connected  POS0/4/0/0
2222::1/128
  receive    POS0/4/0/0
3333::/64
  connected  POS0/3/0/0
3333::2/128
  receive    POS0/3/0/0
5656::2/128
  recursive  fe80::3031:48ff:fe53:5533, POS0/3/0/0
7777::/64
  connected  POS0/0/0/0
7777::2/128
  receive    POS0/0/0/0
9999::1/128
  recursive  fe80::205:5fff:fe1d:7600, POS0/4/0/0
ff00::/8
  drop
ff02::1/128
  receive    
ff02::2/128
  receive    
ff02::5/128
  receive    
ff02::6/128
  receive    
ff02::1:ff00:0/104
  receive 
Table 24 describes the significant fields shown in the display.

Table 24 show cef ipv6 Field Descriptions

Field

Description

drop

Indicates that packets sent to the destination prefix are dropped.

loopback

Indicates that the prefix points to a loopback address. Packets sent to loopback addresses are dropped.

receive

Indicates that the prefix is configured on one of the router interfaces. Packets sent to those prefixes are received by the router.

connected

Indicates that the prefix points to a directly connected next-hop interface.

recursive

Indicates that the prefix is not directly connected but is reachable through the next-hop prefix displayed.

The following is sample output from show cef ipv6 detail:
RP/0/RP0/CPU0:router# show cef ipv6 detail
::/0
  flags: source_rib
  Loadinfo owner: <this route>
  fast adj: glean
  path 1:
    flags     : 
    next hop  : ::
    interface : POS0/0/0/0
::/128
  flags: drop, source_fib
  Loadinfo owner: <this route>
  fast adj: drop
  path 1:
    flags     : 
    next hop  : ::
    interface : <not specified>
::1/128
  flags: loopback, source_fib
  Loadinfo owner: <this route>
  fast adj: loopback
  path 1:
    flags     : 
    next hop  : ::
    interface : <not specified>
66::4/128
  flags: receive, source_rib
  Loadinfo owner: <this route>
  fast adj: receive
  path 1:
    flags     : point-to-point
    next hop  : ::
    interface : Loopback0
Table 25 describes the significant output fields shown in the display.

Table 25 show cef ipv6 detail Field Descriptions

Field

Description

flags:

Properties of the indicated prefix.

Loadinfo owner:

Owner of the Loadinfo used by the prefix for forwarding. The Loadinfo owner is the prefix that owns the array of pointers to adjacencies.

fast adj:

Cached adjacency used for forwarding.

path 1:

The following three items are displayed below path 1:

•flags-Properties of the path.

•next hop-Next-hop prefix if the packet is being forwarded.

•interface-Next-hop interface if the packet is being forwarded.

Related Commands

Command

Description

show cef ipv4

Displays the IPv4 CEF table

show cef ipv6 adjacency

To display IPv6 CEF adjacency status and configuration information, use the show cef ipv6 adjacency command in EXEC mode.

show cef [vrf vrf-name] ipv6 adjacency [interface-type interface-instance] [location node-id] [detail] [discard] [glean] [null] [punt] [remote]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

interface-type

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

interface-instance

Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

detail

(Optional) Displays the detailed adjacency information.

discard

(Optional) Filters out and displays only the discarded adjacency information.

glean

(Optional) Filters out and displays only the glean adjacency information.

null

(Optional) Filters out and displays only the null adjacency information.

punt

(Optional) Filters out and displays only the punt adjacency information.

remote

(Optional) Filters out and displays only the remote adjacency information.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays the CEF adjacency table for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from show cef ipv6 adjacency command:
RP/0/RP1/CPU0:ios# show cef ipv6 adjacency MgmtEth 0/RP1/CPU0/0
Display protocol is ipv6
Interface    Address                                         Type    Refcount
Mg0/RP1/CPU0/0Prefix: 12.25.0.3/32                            local   2
             Adjacency: PT:0x782a2900 12.25.0.3/32
             Interface: Mg0/RP1/CPU0/0
             MAC: 00.d0.02.75.ab.fd.00.11.93.ef.e3.50.08.00
             Interface Type: 0x8, Base Flags: 0x1
             Dependent adj type: remote
             Dependent adj intf: Mg0/RP1/CPU0/0
Mg0/RP1/CPU0/0Prefix: 0.24.0.32/32                            remote  6
             Adjacency: PT:0x782a2b58
             Interface: Mg0/RP1/CPU0/0
             MAC: 28.4e.4f.4e.45.29
             Interface Type: 0x8, Base Flags: 0x0
Table 26 describes the significant fields shown in the display.

Table 26 show cef ipv6 adjacency Field Descriptions

Field

Description

Interface

Interface associated with the prefix.

Address

Prefix address information.

Type

Type of adjacency, can be either local or remote.

Refcount

Number of times the adjacency is referenced by other routers.

Related Commands

Command

Description

show cef ipv4 adjacency

Displays CEF IPv4 adjacency status and configuration information.

show cef ipv6 adjacency hardware

To displayIPv6 CEF adjacency hardware status and configuration information, use the show cef ipv6 adjacency hardware command in EXEC mode.

show cef [vrf vrf-name] ipv6 adjacency hardware {egress | ingress [detail | discard | drop | glean | location node-id | null | punt | remote]}
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

egress

Displays information from the egress packet switch exchange (PSE) file.

ingress

Displays information from the ingress packet switch exchange (PSE) file.

detail

(Optional) Displays full details.

discard

(Optional) Displays the discard adjacency information.

drop

(Optional) Displays the drop adjacency information.

glean

(Optional) Displays the glean adjacency information.

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

null

(Optional) Displays the null adjacency information.

punt

(Optional) Displays the punt adjacency information.

remote

(Optional) Displays the remote adjacency information.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 adjacency hardware command:
RP/0/RP0/CPU0:router# show cef ipv6 adjacency hardware
Interface    Address                                         Type    Refcount
Mg0/RP0/CPU0/0                                                special 4
             Interface: Mg0/RP0/CPU0/0 Type:  glean
             Interface Type: 0x8, Base Flags: 0x4400
             Dependent adj type: remote
             Dependent adj intf: Mg0/RP0/CPU0/0
Mg0/RP0/CPU0/0Prefix: 64.102.12.47/32                         local   3
             Adjacency: PT:0x78f5c708 64.102.12.47/32
             Interface: Mg0/RP0/CPU0/0
             MAC: 00.30.f2.f2.10.38.00.11.93.ef.e8.e6.08.00
             Interface Type: 0x8, Base Flags: 0x1
             Dependent adj type: remote
             Dependent adj intf: Mg0/RP0/CPU0/0
Table 27 describes the significant fields shown in the display.

Table 27 show cef ipv6 adjacency hardware Field Descriptions

Field

Description

Interface

Interface associated with the prefix.

Address

Prefix address information.

Type

Type of adjacency, can be either local or remote.

Refcount

Number of times the adjacency is referenced by other routers.

Related Commands

Command

Description

show cef ipv4 adjacency hardware

Displays CEF IPv4 adjacency hardware status and configuration information

show cef ipv6 drops

To display IPv6 CEF table packet drop counters, use the show cef ipv6 drops command in EXEC mode.

show cef [vrf vrf-name] ipv6 drops [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays IPv6 CEF table packet drop counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

A packet might be dropped by the IPv6 CEF table because of unresolved CEF entries, unsupported features, absence of route information, absence of adjacency information, or an IP checksum error.

If you do not specify a node with the location keyword and node-id argument, this command displays the packet drops for all nodes.

Note Because no hardware forwarding occurs on the route processor (RP), no packet drop information is displayed for that node.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 drops command:
RP/0/RP0/CPU0:router# show cef ipv6 drops location 0/2/CPU0 
 IPv6 CEF Drop Statistics 
  Line status down      ingress :               0 egress :  Not Applicable 
  Packet sanity fail    ingress :               0 egress :               0 
  PLU set to drop       ingress :               0 egress :               0 
  Unknown type,plu drop ingress :               0 egress :               0 
  Packet length err     ingress :               0 egress :               0 
  TCAM src-comp err     ingress :               0 egress :               0 
Table 28 describes the significant fields shown in the display.

Table 28 show cef ipv6 drop Field Descriptions

Field

Description

Line status down

Packet drops due to the line protocol of the incoming interface being down.

Packet sanity fail

Packet drops due to the prefix failing the IPv6 sanity test. The sanity test verifies that the IPv6 packet is valid.

PLU set to drop

Packet drops due the IPv6 destination prefix being set to drop.

Unknown type, plu drop

Packet drops due to the prefix being of an unknown type.

Packet length errs

Length specified in the header does not match the actual length of the packet received.

TCAM src-comp err

Packet drops due to source compression errors that have occurred in the hardware.

Related Commands

Command

Description

clear cef ipv6 drops

Clears IPv6 CEF packet drop counters.

show cef ipv6 exact-route

To display the path an IPv6 flow comprising a source and destination address would take, use the show cef ipv6 exact-route command in EXEC mode.

show cef [vrf vrf-name] ipv6 exact-route {source-address destination-address} [detail | location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

detail

(Optional) Displays full CEF entry information.

location node-id

(Optional) Displays the IPv6 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced on the Cisco CRS-1.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 exact-route command:
RP/0/RP0/CPU0:router# show cef ipv6 exact-route 222::2 9999::6751 location 
0/3/CPU0 source address: 222::2 destination address: 9999::6751
interface : TenGigE0/3/0/3 non local interface
Note In the example above, the show output does not require an explanation of the various fields.

Related Commands

Command

Description

show cef ipv4 exact-route

Displays the path an IPv4 flow comprising a source and destination address will take.

show cef ipv6 exceptions

To display IPv6 CEF exception packet counters, use the show cef ipv6 exceptions command in EXEC mode.

show cef [vrf vrf-name] ipv6 exceptions [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays IPv6 CEF exception packet counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

CEF exception packets are those packets that have been sent from the hardware to the software because they require additional handling. The types of IPv6 CEF exception packets are displayed in the output of show cef ipv6 exceptions.

If you do not specify a node with location keyword and node-id argument, this command displays IPv6 CEF exception packet counters for all nodes.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 exceptions command:
RP/0/RP0/CPU0:router: show cef ipv6 exceptions location 0/3/CPU0
IPv6 CEF Exception Statistics
Node: 0/3/CPU0
  TTL err               ingress :               0 egress :  Not Applicable
  Link-local dst addr   ingress :               0 egress :               0
  Hop-by-Hop header     ingress :               0 egress :               0
  PLU entry set to punt ingress :               0 egress :               0
  Packet too big        ingress :  Not Applicable egress :               0
  Med priority punt     ingress :               0 egress :  Not Applicable
Table 29 describes the significant fields shown in the display.

Table 29 show cef ipv6 exceptions Field Descriptions

Field

Description

TTL err

Packets sent to software for processing because the packet header of the IPv6 prefix had a TTL¹ error.

Link-local dst addr

Packets sent to the software for processing because the destination address of the IPv6 prefix is link local.

Hop-by-Hop header

Packets sent to the software for processing because the IPv6 packet has a hop-by-hop header.

PLU entry set to punt

Packets sent to software for processing because the IPv6 prefix is set to punt.

Packet too big

Packets sent to the software for processing because the packet size exceeded the MTU².

Med priority punt

Field used internally for troubleshooting.

¹TTL = time to live

²MTU = maximum transmission unit

Related Commands

Command

Description

clear cef ipv4 exceptions

Clears IPv4 CEF exception packet counters.

show cef ipv6 external hardware

To display CEF information related to CEF external clients, use the show cef ipv6 external hardware command in EXEC mode.

show cef [vrf vrf-name] ipv6 external hardare {ingress | detail} location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

ingress

Display information read from the ingress packet switch exchange (PSE).

detail

Displays full information about CEF external clients.

location node-id

(Optional) Displays CEF exception packet counters for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The show cef ipv6 external hardware command displays every prefix that an external client is interested in as well as the hardware information from the platform.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output for the show cef ipv6 external hardare command:
RP/0/RP0/CPU0:router# show cef ipv6 vrf_1 external hardare ingress location 0/1/0
Client Name       : l2fib_mgr
Interest type     : EOS0 LDI updates
Prefix            : 3.3.3.3/32
Number of notifs  : 1
State             : resolved, mismatch, cached plat context, in retry
Via               : drop
    Load distribution: 0 (refcount 0)
    Hash  OK  Interface                 Address
    0     Y   Unknown                   drop           
    INGRESS External CLient Load info:
Total Recursive Paths 0
    TLU1 0x00004610 nexthop: 0.0.0.0
    TLU1 ENTRY        0
     SW: 0x00000002 00010000 00000000 00000100
     HW: 0x00000002 00010000 00000000 00000100
    local:                0x0    drop:                0x1
    next ptr:     0x00010000
    num of entries:    1
    Recursive next-hop:   0.0.0.0
Table 30 describes the significant fields shown in the display.

Table 30 show cef ipv4 external hardware Field Descriptions

Field

Description

Client Name

Process name of the client (for example, l2fib_mgr).

Interest type

Client interest type, which may be:

•IP reachability notify

•EOS0 LDI updates

•IP LDI updates

•6VPE MPLS nexthop reachability

•6VPE IP tunnel nexthop reachability

Prefix

Client prefix. If the interest type is 6VPE, you will see Tunnel Id for the outgoing tunnel if the prefix length is not 0.

Number of notifs

Number of times the client has been notified about this prefix.

State

Client state, which may be:

•resolved/unresolved

•mismatch

•path

•notif pending

•cached plat context

•in retry

•stale

Via

Next hop for this prefix.

Total Recursive Paths

Number of buckets for recursive loadinfo. This is the number of paths available for a prefix learnt through BGP, or static recursive routes.

TLU1

Recursive loadinfo parameters.

SW/HW

HW: Information programmed in hardware.

SW: Software shadow information.

next ptr

Next memory location for hardware lookup.

num of entries

Number of buckets for non-recursive loadinfo. This is the number of paths learned through IGP or static non-recursive routers.

Related Commands

Command

Description

show cef ipv4 external hardware

To display information related to IPv4 CEF external clients.

show cef ipv6 hardware

To display IPv6 CEF hardware status and configuration information, use the show cef ipv6 hardware command in EXEC mode.

show cef [vrf vrf-name] ipv6 hardware {egress | ingress [detail | location node-id]}
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

egress

Displays information from the egress packet switch exchange (PSE) file.

ingress

Displays information from the ingress packet switch exchange (PSE) file.

detail

(Optional) Displays full details.

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 hardware egress command:
RP/0/RP0/CPU0:router# show cef ipv6 hardware egress 
Prefix              Next Hop            Interface
0.0.0.0/0           172.29.52.1         <recursive> 
0.0.0.0/32          broadcast
10.1.1.1/32         receive             Loopback0
10.2.2.2/32         10.12.24.2          Bundle-POS24
10.6.6.6/32         10.16.8.6           GigabitEthernet0/6/5/2
10.7.7.7/32         10.12.24.2          Bundle-POS24
10.11.11.11/32      10.12.8.2           POS0/1/0/1
10.12.4.0/24        attached            POS0/6/4/5
10.12.4.0/32        broadcast           POS0/6/4/5
10.12.4.1/32        receive             POS0/6/4/5
10.12.4.255/32      broadcast           POS0/6/4/5
10.12.8.0/24        attached            POS0/1/0/1
10.12.8.0/32        broadcast           POS0/1/0/1
10.12.8.1/32        receive             POS0/1/0/1
10.12.8.255/32      broadcast           POS0/1/0/1
10.12.12.0/24       attached            POS0/6/0/1
Table 31 describes the significant fields shown in the display.

Table 31 show cef ipv6 hardware egress Field Descriptions

Field

Description

Prefix

Nonrecursive prefixes detected on the node.

Next Hop

Routing next hop.

Interface

Interface associated with the nonrecursive prefix.

Related Commands

Command

Description

show cef ipv4 hardware

Displays CEF IPv4 hardware status and configuration information.

show cef ipv6 interface bgp-policy-statistics

To display IPv6 Cisco Express Forwarding (CEF)-related BGP policy statistics information for an interface, use the show cef ipv6 interface bgp-policy-statistics command in EXEC mode.

show cef [vrf vrf-name] ipv6 interface type instance bgp-policy-statistics
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.4.0

This command was introduced on the Cisco CRS-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. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The show cef ipv6 interface bgp-policy-statistics command displays all the configured BGP policy counters for the specified interface.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv4 interface bgp-policy-statistics command:
RP/0/RP0/CPU0:router# show cef ipv6 interface TenGigE 0/2/0/4 bgp-policy-statistics
TenGigE0/2/0/4 is up
Input BGP policy accounting on src IP address enabled
buckets packets  bytes
0       184054   10157753
6       65688590 4204069760
7       65688590 4204069760
8       65688654 4204073856
9       65688656 4204073984
10      65688655 4204073920
30      32844290 1510837340
31      32844291 1510837386
32      32844294 1510837524
33      32844296 1510837616
34      32844298 1510837708
35      32844302 1510837892
36      32844302 1510837892
37      32844303 1510837938
38      32844305 1510838030
39      32844307 1510838122
Output BGP policy accounting on dst IP address enabled
buckets packets bytes
0       754     43878
Output BGP policy accounting on src IP address enabled
buckets packets bytes
0       857     51706
Table 32 describes the significant fields shown in the display.

Table 32 show cef ipv6 interface bgp-policy-statistics Field Descriptions

Field

Description

TenGigE 0/2/0/4 is up

Status of the interface.

Input BGP policy accounting on src IP address enabled

Enabled BGP policy accounting features.

buckets

Traffic index.

packets

Number of packets counted in the bucket.

bytes

Number of bytes counted in the bucket.

Related Commands

Command

Description

show cef ipv4 interface bgp-policy-statistics

Displays IPv4 CEF-related BGP policy statistics information for an interface.

show cef ipv6 interface

To display IPv6 Cisco Express Forwarding (CEF)-related information for an interface, use the show cef ipv6 interface command in EXEC mode.

show cef [vrf vrf-name] ipv6 interface type instance [detail] [rpf-statistics] [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

type

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

instance

Either a physical interface instance or a virtual interface instance as follows:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the modular services card or line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

detail

(Optional) Displays detailed CEF information for all the interfaces on the node in which the command is issued.

rpf-statistics

(Optional) Displays the unicast reverse path forwarding (RPF) statistics.

location node-id

(Optional) Displays IPv6 CEF-related information for an interface. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, the show cef ipv6 interface command displays the CEF-related information for the interface on the route processor.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 interface command:
RP/0/RP0/CPU0:router# show cef ipv6 interface MgmtEth 0/RP0/CPU0/0 
MgmtEth0/0/CPU0/0 is up (if_handle 0x01000100)
  Forwarding is enabled
  ICMP redirects are never sent
  IP MTU 1500, TableId 0xe0000000
  Reference count 2
Table 33 describes the significant fields shown in the display.

Table 33 show cef ipv6 interface Field Descriptions

Field

Description

MgmtEth 0/RP0/CPU0/0 is up

Status of the interface.

if_handle

Internal interface handle.

Forwarding is enabled

Indicates that CEF is enabled.

ICMP redirects are always sent or never sent

Indicates whether ICMP¹ redirect messages should be sent. By default, ICMP redirect messages are always sent.

IP MTU

Value of the IPv4 MTU² size set on the interface.

Reference count

Internal reference counter.

¹ICMP = internet control message protocol

²MTU = maximum transmission unit

Related Commands

Command

Description

show cef ipv4 interface

Displays IPv4 CEF-related information for an interface.

show cef ipv6 non-recursive

To display the nonrecursive prefix entries in the IPv6 CEF table, use the show cef ipv6 non-recursive command in EXEC mode.

show cef [vrf vrf-name] ipv6 non-recursive [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays the nonrecursive prefix entries in the IPv6 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays the nonrecursive routes for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 non-recursive command:
RP/0/RP0/CPU0:router# show cef ipv6 non-recursive 
::/0
::/128
  drop
::1/128
  loopback
66::4/128
  receive    Loopback0
2222::/64
  connected  POS0/4/0/0
2222::1/128
  receive    POS0/4/0/0
3333::/64
  connected  POS0/3/0/0
3333::2/128
  receive    POS0/3/0/0
7777::/64
  connected  POS0/0/0/0
7777::2/128
  receive    POS0/0/0/0
ff00::/8
  drop
ff02::1/128
  receive    
ff02::2/128
  receive    
ff02::5/128
  receive    
ff02::6/128
  receive    
ff02::1:ff00:0/104
  receive 
Table 34 describes the significant fields shown in the display.

Table 34 show cef ipv6 non-recursive Field Descriptions

Field

Description

drop

Indicates that packets sent to the destination prefix are dropped.

loopback

Indicates that the prefix points to a loopback address. Packets sent to loopback addresses are dropped.

receive

Indicates that the prefix is configured on one of the router interfaces. Packets sent to those prefixes are received by the router.

connected

Indicates that the prefix points to a directly connected next-hop interface.

Related Commands

Command

Description

show cef ipv4 non-recursive

Displays IPv4 nonrecursive prefix entries in the CEF table.

show cef ipv6 resources

To display IPv6 CEF resource availability status, use the show cef ipv6 resources command in EXEC mode.

show cef ipv6 resources [ detail ] [location node-id]
Syntax Description

detail

(Optional) Displays detailed information resources listed in the IPv6 CEF table.

location node-id

(Optional) Displays the IPv6 resource entries in the IPv6 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, the output displays the IPv6 CEF nonrecursive routes for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 resource command:
RP/0/RP0/CPU0:router# show cef ipv6 resource
CEF resource availability summary state: GREEN
  ipv4 shared memory resource: GREEN
  ipv6 shared memory resource: GREEN
  mpls shared memory resource: GREEN
  common shared memory resource: GREEN
  TABLE hardware resource: GREEN
  LEAF hardware resource: GREEN
  LOADINFO hardware resource: GREEN
  NHINFO hardware resource: GREEN
  LABEL_INFO hardware resource: GREEN
  IDB hardware resource: GREEN
  FRR_NHINFO hardware resource: GREEN
  LDSH_ARRAY hardware resource: GREEN
  RSRC_MON hardware resource: GREEN
Note In the example above, the show output does not require an explanation of the various fields.

Related Commands

Command

Description

show cef ipv4 resources

Displays IPv4 CEF resource availability status.

show cef ipv6 summary

To display a summary of the IPv6 CEF table, use the show cef ipv6 summary command in EXEC mode.

show cef [vrf vrf-name] ipv6 summary [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays a summary of the IPv6 CEF table for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced on the Cisco CRS-1.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays a summary of the IPv6 CEF table for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

The following is sample output from the show cef ipv6 summary command:
RP/0/RP0/CPU0:router# show cef ipv6 summary 
IPv6 CEF with switching (Table Version 0)
  9 routes, 0 background, 0 pending, 0 unresolved paths
  9 load sharing elements, 324 bytes, 9 references
  3384 bytes fib leaf memory
Router ID is 0.0.0.0
Adjacency Table has 15 adjacencies
  2 incomplete adjacencies
Table 35 describes the significant fields shown in the display.

Table 35 show cef ipv6 summary Field Descriptions

Field

Description

Table Version

Version of the CEF table.

routes

Total number of routes.

unresolved (x old, x new)

Number of routes not yet resolved.

load sharing elements

Total number of internal load-sharing data structures.

bytes

Total memory used by internal load sharing data structures.

references

Total reference count of all internal load sharing data structures.

CEF resets

Number of CEF table resets.

revisions of existing leaves

Number of updates to existing prefixes.

Exponential (currently xs, peak xs)

Currently not used.

prefixes modified in place

Prefixes modified in place.

Router ID

Router identification.

Adjacency Table has x adjacencies

Total number of adjacencies.

x incomplete adjacency

Total number of incomplete adjacencies.

Related Commands

Command

Description

show cef ipv4 summary

Displays a summary of the IPv4 CEF table.

show cef ipv6 unresolved

To display the unresolved routes in the IPv6 CEF table, use the show cef ipv6 unresolved command in EXEC mode.

show cef [vrf vrf-name] ipv6 unresolved [location node-id]
Syntax Description

vrf

(Optional) Displays VPN routing and forwarding (VRF) instance information.

vrf-name

(Optional) Name of a VRF.

location node-id

(Optional) Displays the unresolved routes in the IPv6 CEF table for the specified node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was supported on the Cisco XR 12000 Series Router.

Release 3.3.0

The vrf keyword and vrf-name argument were added.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays the unresolved routes for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

This following is sample output from show cef ipv6 unresolved command when an unresolved route is detected:
RP/0/RP0/CPU0:router# show cef ipv6 unresolved
9999::/64
  unresolved
Table 36 describes the significant fields shown in the display.

Table 36 show cef ipv6 unresolved Field Descriptions

Field

Description

xxxx::/xx

Detected unresolved route.

Related Commands

Command

Description

show cef ipv4 unresolved

Displays unresolved routes in the IPv4 CEF table.

show cef mpls adjacency

To display the Multiprotocol Label Switching (MPLS) adjacency table, use the show cef mpls adjacency command in EXEC mode.

show cef mpls adjacency [interface-type interface-instance] [location node-id]
Syntax Description

interface-type

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

interface-instance

Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port and a slash mark between values is required as part of the notation.

–rack: Chassis number of the rack.

–slot: Physical slot number of the line card.

–module: Module number. A physical layer interface module (PLIM) is always 0.

–port: Physical port number of the interface.

Note In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.
Example: interface MgmtEth0/RP1/CPU0/0.

•Virtual interface instance. Number range varies depending on interface type.

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

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

If you do not specify a node with the location keyword and node-id argument, this command displays the unresolved routes for the node on which the command is issued.

Task ID

Task ID

Operations

cef

read

Examples

This following is sample output from show cef mpls adjacency command:
RP/0/RP0/CPU0:router# show cef mpls adjacency
Display protocol is mpls
Interface    Address                                         Type    Refcount
BP24         Prefix: 0/0                                     local   10
             no next-hop adj
             Interface: None
             Mac-length is 0
             incomplete
             Interface Type: 0x1d, Base Flags: 0x100
             Dependent adj type: remote
             Dependent adj intf: BP24
Related Commands

Command

Description

show cef mpls unresolved

Displays Multiprotocol Label Switching (MPLS) unresolved routes.

show cef mpls unresolved

To display the Multiprotocol Label Switching (MPLS) unresolved routes, use the show cef mpls unresolved command in EXEC mode.

show cef mpls unresolved [detail] [location node-id]
Syntax Description

detail

(Optional) Displays detailed adjacency information, including Layer 2 information.

location node-id

(Optional) Displays detailed CEF information for the designated node. The node-id argument is entered in the rack/slot/module notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

This following is sample output from show cef mpls unresolved command:
RP/0/RP0/CPU0:router# show cef mpls unresolved
Label/EOS           Next Hop            Interface
Related Commands

Command

Description

show cef mpls adjacency

Displays the Multiprotocol Label Switching (MPLS) adjacency table.

show cef vrf

To display the contents of the VPN routing and forwarding (VRF) instance, use the show cef vrf command in EXEC mode.

show cef vrf [vrf-name]
Syntax Description

vrf-name

Name of the VRF instance.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1.

Release 3.4.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

cef

read

Examples

This following is sample output from show cef vrf command when an unresolved route is detected:
RP/0/RP0/CPU0:router# show cef vrf 0
Prefix              Next Hop            Interface
0.0.0.0/0           drop                default handler
0.0.0.0/32          broadcast
224.0.0.0/24        receive
255.255.255.255/32  broadcast
Table 37 describes the significant fields shown in the display.

Table 37 show cef vrf Field Descriptions

Field

Description

Prefix

Prefix in the IPv4 CEF table.

Next Hop

Next hop of the prefix.

Interface

Interface associated with the prefix.