Cisco IOS Multitopology Routing Command Reference
S through U
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S through U

S through U

scope

To define the scope for a Border Gateway Protocol (BGP) routing session and to enter router scope configuration mode, use the scope command in router configuration mode. To remove the scope configuration, use the no form of this command.

scope { global | vrf vrf-name }

no scope { global | vrf vrf-name }

Syntax Description

global

Configures BGP to use the global routing table or a specific topology table.

vrf

Configures BGP to use a specific VRF routing table.

vrf-name

Name of an existing VRF.

Command Default

No scope is defined for a BGP routing session.

Command Modes

Router configuration (config-router)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

Usage Guidelines

A new configuration hierarchy, named scope, has been introduced into the BGP protocol. To implement Multitopology Routing (MTR) support for BGP, the scope hierarchy is required, but the scope hierarchy is not limited to MTR use. The scope hierarchy introduces some new configuration modes such as router scope configuration mode. Router scope configuration mode is entered by configuring the scope command in router configuration mode, and a collection of routing tables is created when this command is entered. The scope is configured to isolate routing calculation for a single network (globally) or on a per-VRF basis, and BGP commands configured in routing scope configuration mode are referred to as scoped commands. The scope hierarchy can contain one or more address families.

The BGP command-line interface (CLI) has been modified to provide backwards compatibility for pre-MTR BGP configuration and to provide a hierarchal implementation of MTR. From router scope configuration mode, MTR is configured first by entering the address-family command to enter the desired address family and then by entering the topology command to define the topology


Note


Configuring a scope for a BGP routing process removes CLI support for pre-MTR-based configuration.


Examples

The following example defines a global scope that includes both unicast and multicast topology configurations. Another scope is specifically defined only for the VRF named DATA.

Device(config)# router bgp 45000 
Device(config-router)# scope global
Device(config-router-scope)# bgp default ipv4-unicast
Device(config-router-scope)# neighbor 172.16.1.2 remote-as 45000
Device(config-router-scope)# neighbor 192.168.3.2 remote-as 50000
Device(config-router-scope)# address-family ipv4 unicast 
Device(config-router-scope-af)# topology VOICE 
Device(config-router-scope-af)# bgp tid 100 
Device(config-router-scope-af)# neighbor 172.16.1.2 activate
Device(config-router-scope-af)# exit 
Device(config-router-scope)# address-family ipv4 multicast
Device(config-router-scope-af)# topology base 
Device(config-router-scope-af-topo)# neighbor 192.168.3.2 activate
Device(config-router-scope-af-topo)# exit
Device(config-router-scope-af)# exit
Device(config-router-scope)# exit
Device(config-router)# scope vrf DATA
 
Device(config-router-scope)# neighbor 192.168.1.2 remote-as 40000
 
Device(config-router-scope)# address-family ipv4 
Device(config-router-scope-af)# neighbor 192.168.1.2 activate
 
Device(config-router-scope-af)# end

Related Commands

Command

Description

bgp tid

Configures BGP to accept routes with a specified topology ID.

topology (BGP)

Configures a process to route IP traffic under the specified topology instance.

select-topology

To attach the policy map to the topology, use the select-topology command in policy map class configuration mode. To remove the association of the policy map with the topology, use the no form of this command.

select-topology topology-name

no select-topology topology-name

Syntax Description

topology-name

Name of the topology.

Command Default

No policy map is attached to the topology.

Command Modes

Policy map class configuration (config-pmap-c)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Examples

In the following example, the topology VOICE is configured to be attached to the policy map BLUE:

Device(config)# global-address-family ipv4 
Device(config-af)# topology VOICE
Device(config-af-topology)# all-interfaces
Device(config-af-topology)# exit
Device(config-af)# exit
Device(config)# class-map match-any DATA
Device(config-cmap)# match ip dscp 9
Device(config-cmap)# exit
Device(config)# policy-map type class-routing ipv4 unicast BLUE 
Device(config-pmap)# class DATA 
Device(config-pmap-c)# select-topology VOICE 
Device(config-pmap-c)# exit 
Device(config-pmap)# exit
Device(config)# global-address-family ipv4 
Device(config-af)# service-policy type class-routing BLUE
Device(config-af)# end 

service-policy type class-routing

To attach the service policy to the policy map for Multitopology Routing (MTR) traffic classification and to activate MTR, use the service-policy type class-routing command in global address family configuration mode. To detach the service policy from the policy map, use the no form of this command.

service-policy type class-routing policy-map-name

no service-policy type class-routing policy-map-name

Syntax Description

policy-map-name

Policy map name.

Command Default

The service policy is not attached.

Command Modes

Global address family configuration (config-af)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

The service-policy type class-routing command is used to attach a service policy to a policy map for MTR traffic classification. MTR traffic classification is used to configure topology-specific forwarding behaviors when multiple topologies are configured on the same device. Class-specific packets are associated with the corresponding topology table forwarding entries.

After the service-policy type class-routing command is entered, MTR is activated.

Examples

The following example shows how to configure traffic classification for a topology instance named VOICE:

Device(config)# global-address-family ipv4 
Device(config-af)# topology VOICE
Device(config-af-topology)# all-interfaces
Device(config-af-topology)# exit
Device(config-af)# exit
Device(config)# class-map match-any DATA
Device(config-cmap)# match ip dscp 9
Device(config-cmap)# exit
Device(config)# policy-map type class-routing ipv4 unicast BLUE 
Device(config-pmap)# class DATA 
Device(config-pmap-c)# select-topology VOICE 
Device(config-pmap-c)# exit
Device(config-pmap)# exit 
Device(config)# global-address-family ipv4 
Device(config-af)# service-policy type class-routing BLUE
Device(config-af)# end 

Related Commands

Command

Description

class-map

Creates a class map to match packets to a specific class of traffic.

global-address-family ipv4

Enters global address family configuration mode to configure MTR.

exit-global-af

Exits global address family configuration mode and enters global configuration mode.

policy-map type class-routing ipv4 unicast

Creates or modifies a policy map for MTR and enters policy map configuration mode.

show ip bgp topology

To display topology instance information from the Border Gateway Protocol (BGP) table, use the show ip bgp topology command in privileged EXEC mode.

With BGP show Command Argument

show ip bgp topology { * | topology } [bgp-keyword]

With IP Prefix and Mask Length Syntax

show ip bgp topology { * | topology } [ ip-prefix/length [bestpath] [ longer-prefixes [injected] ] [multipaths] [ shorter-prefixes [mask-length] ] [subnets] ]

With Network Address Syntax

show ip bgp topology { * | topology } [ network-address [ mask | bestpath | multipaths ] [bestpath] [ longer-prefixes [injected] ] [multipaths] [ shorter-prefixes [mask-length] ] [subnets] ]

Syntax Description

*

Displays all routing topology instances.

topology

Name of topology for which information is displayed.

bgp-keyword

(Optional) Argument representing a show ip bgp command keyword that can be added to this command. See the Additional show ip bgp Commands and Descriptions table below.

ip-prefix / length

(Optional) The IP prefix address (in dotted decimal format) and the length of the mask (0 to 32). The slash mark must be included.

bestpath

(Optional) Displays the bestpath for the specified prefix.

longer-prefixes

(Optional) Displays the route and more specific routes.

injected

(Optional) Displays more specific routes that were injected because of the specified prefix.

multipaths

(Optional) Displays the multipaths for the specified prefix.

shorter-prefixes

(Optional) Displays the less specific routes.

mask-length

(Optional) The length of the mask is 0 to 32. Prefixes longer than the specified mask length are displayed.

subnets

(Optional) Displays the subnet routes for the specified prefix.

network-address

(Optional) The IP address of a network in the BGP routing table.

mask

(Optional) The mask of the network address, in dotted decimal format.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

Usage Guidelines

The table below displays optional additional show ip bgp command keywords that can be configured with the show ip bgp topology command. Replace the bgp-keyword argument with the appropriate keyword from the table. For more details about each command in its show ip bgp bgp-keyword form, see the Cisco IOS IP Routing Protocols Command Reference.

Table 1 Additional show ip bgp Commands and Descriptions

Command

Description

cidr-only

Display only routes with non-natural netmasks.

community

Displays routes that match a specified community.

community-list

Displays routes that match a specified community list.

dampening

Displays paths suppressed because of dampening (BGP route from peer is up and down).

extcommunity-list

Displays routes that match a specified extcommunity list.

filter-list

Displays routes that conform to the filter list.

import

Display route topology import and/or export activity.

inconsistent-as

Displays only routes that have inconsistent autonomous systems of origin.

injected-paths

Displays all injected paths.

labels

Displays labels for IPv4 NLRI specific information.

neighbors

Displays details about TCP and BGP neighbor connections.

oer-paths

Displays all OER-managed path information.

paths [regexp]

Displays autonomous system path information. If the optional regexp argument is entered, the autonomous system paths that are displayed match the autonomous system path regular expression.

peer-group

Displays information about peer groups.

pending-prefixes

Displays prefixes that are pending deletion.

prefix-list

Displays routes that match a specified prefix list.

quote-regexp

Displays routes that match the quoted autonomous system path regular expression.

regexp

Displays routes that match the autonomous system path regular expression.

replication

Displays the replication status update groups.

rib-failure

Displays bgp routes that failed to install in the routing table (RIB).

route-map

Displays routes matching the specified route map.

summary

Displays a summary of BGP neighbor status.

template

Displays peer-policy or peer-session templates.

update-group

Displays information on update groups.

Examples

The following example shows summary output for the show ip bgp topology command. Information is displayed about BGP neighbors configured to use the MTR topology named VIDEO.

Device# show ip bgp topology VIDEO summary

BGP router identifier 192.168.3.1, local AS number 45000
BGP table version is 1, main routing table version 1
Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
172.16.1.2      4 45000     289     289        1    0    0 04:48:44        0
192.168.3.2     4 50000       3       3        1    0    0 00:00:27        0

The table below describes the significant fields shown in the display.

Table 2 show ip bgp topology summary Field Descriptions

Field

Description

BGP router identifier

IP address of the networking device.

local AS number

Number of the local autonomous system.

BGP table version

Internal version number of the table. This number is incremented whenever the table changes.

main routing table version

Last version of the BGP database that was injected into the main routing table.

Neighbor

IP address of a neighbor.

V

BGP version number communicated to that neighbor.

AS

Autonomous system number.

MsgRcvd

BGP messages received from that neighbor.

MsgSent

BGP messages sent to that neighbor.

TblVer

Last version of the BGP database that was sent to that neighbor.

InQ

Number of messages from that neighbor waiting to be processed.

OutQ

Number of messages waiting to be sent to that neighbor.

Up/Down

The length of time that the BGP session has been in the Established state, or the current state if it is not Established.

State/PfxRcd

Current state of the BGP session/the number of prefixes that the device has received from a neighbor or peer group. When the maximum number (as set by the neighbor maximum-prefix command) is reached, the string “PfxRcd” appears in the entry, the neighbor is shut down, and the connection is Idle.

An (Admin) entry with Idle status indicates that the connection has been shut down using the neighbor shutdown command.

The following is partial output for the show ip bgp topology command when the neighbors keyword is used. Information is displayed for each neighbor that is configured to use the topology named VIDEO, and the output is similar to the output for the show ip bgp neighbors command with the addition of topology-related information.

Device# show ip bgp topology VIDEO neighbors

BGP neighbor is 172.16.1.2,  remote AS 45000, internal link
  BGP version 4, remote router ID 192.168.2.1
  BGP state = Established, up for 04:56:30
  Last read 00:00:23, last write 00:00:21, hold time is 180, keepalive interval is 60
seconds
  Neighbor sessions:
    1 active, is multisession capable
  Neighbor capabilities:
    Route refresh: advertised and received(new)
  Message statistics, state Established:
    InQ depth is 0
    OutQ depth is 0
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                0          0
    Keepalives:           296        296
    Route Refresh:          0          0
    Total:                297        297
  Default minimum time between advertisement runs is 0 seconds
 For address family: IPv4 Unicast topology VIDEO
  Session: 172.16.1.2 session 1
  BGP table version 1, neighbor version 1/0
  Output queue size : 0
  Index 1, Offset 0, Mask 0x2
  1 update-group member
  Topology identifier: 100
.
.
.
  Address tracking is enabled, the RIB does have a route to 172.16.1.2
  Address tracking requires at least a /24 route to the peer
  Connections established 1; dropped 0
  Last reset never
  Transport(tcp) path-mtu-discovery is enabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Minimum incoming TTL 0, Outgoing TTL 255
Local host: 172.16.1.1, Local port: 11113
Foreign host: 172.16.1.2, Foreign port: 179
.
.
.
BGP neighbor is 192.168.3.2,  remote AS 50000, external link
  BGP version 4, remote router ID 192.168.3.2
  BGP state = Established, up for 00:08:24
  Last read 00:00:21, last write 00:00:20, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is multisession capable
  Neighbor capabilities:
    Route refresh: advertised and received(new)
  Message statistics, state Established:
    InQ depth is 0
    OutQ depth is 0
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                0          0
    Keepalives:            10         10
    Route Refresh:          0          0
    Total:                 11         11
  Default minimum time between advertisement runs is 30 seconds
 For address family: IPv4 Unicast topology VIDEO
  Session: 192.168.3.2 session 1
  BGP table version 1, neighbor version 1/0
  Output queue size : 0
  Index 2, Offset 0, Mask 0x4
  2 update-group member
  Topology identifier: 100
.
.
.
  Address tracking is enabled, the RIB does have a route to 192.168.3.2
  Address tracking requires at least a /24 route to the peer
  Connections established 1; dropped 0
  Last reset never
  Transport(tcp) path-mtu-discovery is enabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Minimum incoming TTL 0, Outgoing TTL 1
Local host: 192.168.3.1, Local port: 11133
Foreign host: 192.168.3.2, Foreign port: 179
.
.
.

The table below describes the significant fields shown in the display.

Table 3 show ip bgp topology neighbors Field Descriptions

Field

Description

BGP neighbor

IP address of the BGP neighbor.

remote AS

Autonomous system number of the neighbor.

local AS 300 no-prepend (not shown in display)

Verifies that the local autonomous system number is not prepended to received external routes. This output supports the hiding of the local autonomous systems when migrating autonomous systems.

internal link

“internal link” is displayed for internal BGP (iBGP) neighbors. “external link” is displayed for external BGP (eBGP) neighbors.

BGP version

BGP version being used to communicate with the remote device.

remote router ID

IP address of the neighbor.

BGP state

Finite state machine (FSM) stage of session negotiation.

up for

Time, in hh:mm:ss, for which the underlying TCP connection has been in existence.

Last read

Time, in hh:mm:ss, since BGP last received a message from this neighbor.

last write

Time, in hh:mm:ss, since BGP last sent a message to this neighbor.

hold time

Time, in seconds, for which BGP will maintain the session with this neighbor without receiving a messages.

keepalive interval

Time interval, in seconds, at which keepalive messages are transmitted to this neighbor.

Neighbor sessions

Number of BGP neighbor sessions configured and whether they are enabled as a single TCP session or as multiple TCP sessions.

Neighbor capabilities

BGP capabilities advertised and received from this neighbor. “advertised and received” is displayed when a capability is successfully exchanged between two devices.

Route refresh

Status of the route refresh capability.

Message statistics

Statistics organized by message type.

InQ depth

Number of messages in the input queue.

OutQ depth

Number of messages in the output queue.

Sent

Total number of transmitted messages.

Rcvd

Total number of received messages.

Opens

Number of open messages sent and received.

Notifications

Number of notification (error) messages sent and received.

Updates

Number of update messages sent and received.

Keepalives

Number of keepalive messages sent and received.

Route Refresh

Number of route refresh request messages sent and received.

Total

Total number of messages sent and received.

Default minimum time between advertisement runs

Time, in seconds, between advertisement transmissions.

For address family

Address family for which the following fields refer.

Session

IP address and number assigned to the TCP session.

BGP table version

Internal version number of the table. This is the primary routing table with which the neighbor has been updated. The number increments when the table changes.

neighbor version

Number used by the software to track prefixes that have been sent and those that need to be sent.

Topology identifier

Number that is associated with an MTR topology.

Connections established

Number of times a TCP and BGP connection has been successfully established.

dropped

Number of times that a valid session has failed or been taken down.

Last reset

Time since this peering session was last reset. The reason for the reset is displayed on this line.

External BGP neighbor may be... (not shown in the display)

Indicates that the BGP TTL security check is enabled. The maximum number hops that can separate the local and remote peer is displayed on this line.

Connection state

Connection status of the BGP peer.

Minimum incoming TTL, Outgoing TTL

Number of expected incoming or outgoing TTL packets.

Local host, Local port

IP address of the local BGP speaker and BGP port number.

Foreign host, Foreign port

Neighbor address and BGP destination port number.

Related Commands

Command

Description

topology (BGP)

Configures a BGP routing process to route IP for a specified MTR topology instance.

show ip eigrp topology

To display Enhanced Interior Gateway Routing Protocol (EIGRP) topology table entries, use the show ip eigrp topology command in user EXEC or privileged EXEC mode.

show ip eigrp topology [ vrf vrf-name | autonomous-system-number | network [ mask ] | prefix | active | all-links | detail-links | frr | name | pending | summary | zero-successors ]

Syntax Description

vrf vrf-name

(Optional) Displays information about the specified virtual routing and forwarding (VRF) instance.

autonomous-system-number

(Optional) Autonomous system number.

network

(Optional) Network address.

mask

(Optional) Network mask.

prefix

(Optional) Network prefix in the format <network>/<length>; for example, 192.168.0.0/16.

active

(Optional) Displays all topology entries that are in the active state.

all-links

(Optional) Displays all entries in the EIGRP topology table (including nonfeasible-successor sources).

detail-links

(Optional) Displays all topology entries with additional details.

frr

(Optional) Displays information about Fast Reroute (FRR) loop-free alternates (LFAs).

name

(Optional) Displays the IPv4 topology table name. This name is the topology identifier and shows topology-related information for Multitopology Routing (MTR).

pending

(Optional) Displays all entries in the EIGRP topology table that are either waiting for an update from a neighbor or waiting to reply to a neighbor.

summary

(Optional) Displays a summary of the EIGRP topology table.

zero-successors

(Optional) Displays available routes that have zero successors.

Command Default

If this command is used without any of the optional keywords, only topology entries with feasible successors are displayed and only feasible paths are shown.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

10.0

This command was introduced.

12.3(8)T

This command was modified. The output of this command was enhanced to display internal and external EIGRP routes.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2(33)SRB

This command was modified. The name keyword was added to support MTR.

12.2(33)SXH

This command was integrated into Cisco IOS Release 12.2(33)SXH.

15.0(1)M

This command was modified. The vrf vrf-name keyword-argument pair was added.

12.2(33)SRE

This command was modified. The vrf vrf-name keyword-argument pair was added. The name keyword was removed.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

15.1(3)S

This command was integrated into Cisco IOS Release 15.1(3)S. The output of the command was enhanced to display information about wide metrics.

Cisco IOS XE Release 3.4S

This command was modified. The output of the command was enhanced to display information about wide metrics.

Cisco IOS XE Release 3.5S

This command was modified. Information about the Equal Cost Multipath (ECMP) mode was included in the command output.

15.2(1)S

This command was modified. Information about the ECMP mode was included in the command output.

15.2(2)S

This command was modified. The output of the command was enhanced to display route tag values in dotted-decimal format.

Cisco IOS XE Release 3.6S

This command was modified. The output of the command was enhanced to display route tag values in dotted-decimal format.

15.2(3)T

This command was modified. Information about the ECMP mode was included in the command output.

15.2(4)S

This command was modified. The frr keyword was added.

Cisco IOS XE Release 3.7S

This command was modified. The frr keyword was added.

15.1(1)SY

This command was integrated into Cisco IOS Release 15.1(1)SY. The output of the command was enhanced to display information about wide metrics.

Usage Guidelines

Use the show ip eigrp topology command to display topology entries, feasible and nonfeasible paths, metrics, and states. This command can be used without any arguments or keywords to display only topology entries with feasible successors and feasible paths. The all-links keyword displays all paths, whether feasible or not, and the detail-links keyword displays additional details about these paths.

Use this command to display information about EIGRP named and EIGRP autonomous system configurations. This command displays the same information as the show eigrp address-family topology command. We recommend using the show eigrp address-family topology command.

Examples

The following is sample output from the show ip eigrp topology command:

Device# show ip eigrp topology

EIGRP-IPv4 Topology Table for AS(1)/ID(10.0.0.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - Reply status, s - sia status
P 10.0.0.0/8, 1 successors, FD is 409600
        via 192.0.2.1 (409600/128256), Ethernet0/0
P 172.16.1.0/24, 1 successors, FD is 409600
        via 192.0.2.1 (409600/128256), Ethernet0/0
P 10.0.0.0/8, 1 successors, FD is 281600
        via Summary (281600/0), Null0
P 10.0.1.0/24, 1 successors, FD is 281600
        via Connected, Ethernet0/0
The following sample output from the show ip eigrp topology prefix command displays detailed information about a single prefix. The prefix shown is an EIGRP internal route.
Device# show ip eigrp topology 10.0.0.0/8 
 
EIGRP-IPv4 VR(vr1) Topology Entry for AS(1)/ID(10.1.1.2) for 10.0.0.0/8
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 82329600, RIB is 643200
  Descriptor Blocks:
  10.1.1.1 (Ethernet2/0), from 10.1.1.1, Send flag is 0x0
      Composite metric is (82329600/163840), route is Internal
      Vector metric:
        Minimum bandwidth is 16000 Kbit
        Total delay is 631250000 picoseconds
        Reliability is 255/255
        Load is ½55
        Minimum MTU is 1500
        Hop count is 1
        Originating router is 10.1.1.1
								

The following sample output from the show ip eigrp topology prefix command displays detailed information about a single prefix. The prefix shown is an EIGRP external route.

Device# show ip eigrp topology 172.16.1.0/24

EIGRP-IPv4 Topology Entry for AS(1)/ID(10.0.0.1) for 172.16.1.0/24
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 409600, RIB is 643200
  Descriptor Blocks:
  172.16.1.0/24 (Ethernet0/0), from 10.0.1.2, Send flag is 0x0
      Composite metric is (409600/128256), route is External
      Vector metric:
        Minimum bandwidth is 10000 Kbit
        Total delay is 6000 picoseconds
        Reliability is 255/255
        Load is ½55
        Minimum MTU is 1500
        Hop count is 1
        Originating router is 172.16.1.0/24
								External data:
        AS number of route is 0
        External protocol is Connected, external metric is 0
        Administrator tag is 0 (0x00000000)

The following sample output from the show ip eigrp topology prefix command displays ECMP mode information when the no ip next-hop-self command is configured without the no-ecmp-mode keyword in an EIGRP topology. The ECMP mode provides information about the path that is being advertised. If there is more than one successor, the top most path will be advertised as the default path over all interfaces, and “ECMP Mode: Advertise by default” will be displayed in the output. If any path other than the default path is advertised, “ECMP Mode: Advertise out <Interface name>” will be displayed.

Device# show ip eigrp topology 192.168.10.0/24

EIGRP-IPv4 Topology Entry for AS(1)/ID(10.10.100.100) for 192.168.10.0/24
State is Passive, Query origin flag is 1, 2 Successor(s), FD is 284160
  Descriptor Blocks:
  10.100.1.0 (Tunnel0), from 10.100.0.1, Send flag is 0x0
      Composite metric is (284160/281600), route is Internal
      Vector metric:
        Minimum bandwidth is 10000 Kbit
        Total delay is 1100 microseconds
        Reliability is 255/255
        Load is ½55
        Minimum MTU is 1400
        Hop count is 1
        Originating router is 10.10.1.1
								ECMP Mode: Advertise by default
        10.100.0.2 (Tunnel1), from 10.100.0.2, Send flag is 0X0
								Composite metric is (284160/281600), route is Internal
								Vector metric:
								Minimum bandwidth is 10000 Kbit
								Total delay is 1100 microseconds
								Reliability is 255/255
								Load is ½55
								Minimum MTU is 1400
								Hop count is 1
								Originating router is 10.10.2.2
								ECMP Mode: Advertise out Tunnel1

The following sample output from the show ip eigrp topology all-links command displays all paths, even those that are not feasible:

Device# show ip eigrp topology all-links

EIGRP-IPv4 Topology Table for AS(1)/ID(10.0.0.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
P 172.16.1.0/24, 1 successors, FD is 409600, serno 14
        via 10.10.1.2 (409600/128256), Ethernet0/0
        via 10.1.4.3 (2586111744/2585599744), Serial3/0, serno 18

The following sample output from the show ip eigrp topology detail-links command displays additional details about routes:

Device# show ip eigrp topology detail-links 

EIGRP-IPv4 Topology Table for AS(1)/ID(10.0.0.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status 
P 10.0.0.0/8, 1 successors, FD is 409600, serno 6
        via 10.10.1.2 (409600/128256), Ethernet0/0
P 172.16.1.0/24, 1 successors, FD is 409600, serno 14
        via 10.10.1.2 (409600/128256), Ethernet0/0
P 10.0.0.0/8, 1 successors, FD is 281600, serno 3
        via Summary (281600/0), Null0
P 10.1.1.0/24, 1 successors, FD is 281600, serno 1
        via Connected, Ethernet0/0

The following sample output from the show ip eigrp topology frr command displays details about the LFAs in the EIGRP topology:

Device# show ip eigrp topology frr

EIGRP-IPv4 VR(test) Topology Table for AS(1)/ID(10.1.1.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P 192.168.2.0/24, 1 successors, FD is 131153920
        via 10.1.1.2 (131153920/163840), Ethernet0/0
        via 10.3.3.3 (137625600/6635520), Ethernet0/1, [LFA]
P 192.168.1.0/24, 1 successors, FD is 131153920
        via 10.1.1.2 (131153920/163840), Ethernet0/0
        via 10.4.4.4 (137625600/6635520), Ethernet0/2, [LFA]
        via 10.3.3.3 (137625600/6635520), Ethernet0/1
P 192.168.4.0/32, 1 successors, FD is 131727360
        via 10.4.4.4 (131727360/7208960), Ethernet0/2
P 192.168.3.0/24, 1 successors, FD is 131072000
        via Connected, Ethernet0/1
P 192.168.5.0/24, 1 successors, FD is 131072000
        via Connected, Ethernet0/0
P 10.10.10.0/24, 1 successors, FD is 262144000
        via 10.1.1.2 (262144000/196608000), Ethernet0/0
        via 10.4.4.4 (131727360/7208960), Ethernet0/2, [LFA]

The table below describes the significant fields shown in the displays.

Table 4 show ip eigrp topology Field Descriptions

Field

Description

Codes

State of this topology table entry. Passive and Active refer to the EIGRP state with respect to the destination. Update, Query, and Reply refer to the type of packet that is being sent.

  • P - Passive—Indicates that no EIGRP computations are being performed for this route.
  • A - Active—Indicates that EIGRP computations are being performed for this route.
  • U - Update—Indicates that a pending update packet is waiting to be sent for this route.
  • Q - Query—Indicates that a pending query packet is waiting to be sent for this route.
  • R - Reply—Indicates that a pending reply packet is waiting to be sent for this route.
  • r - Reply status—Indicates that EIGRP has sent a query for the route and is waiting for a reply from the specified path.
  • s - sia status—Indicates that the EIGRP query packet is in stuck-in-active (SIA) status.

successors

Number of successors. This number corresponds to the number of next hops in the IP routing table. If “successors” is capitalized, then the route or the next hop is in a transition state.

serno

Serial number.

FD

Feasible distance. The feasible distance is the best metric to reach the destination or the best metric that was known when the route became active. This value is used in the feasibility condition check. If the reported distance of the device is less than the feasible distance, the feasibility condition is met and that route becomes a feasible successor. After the software determines that it has a feasible successor, the software need not send a query for that destination.

via

Next-hop address that advertises the passive route.

Related Commands

Command

Description

show eigrp address-family topology

Displays entries in the EIGRP address-family topology table.

show ip interface (MTR)

To display the usability status of interfaces configured for IP or to display IP traffic statistics for all interfaces or for a particular interface, use the show ip interface command in user EXEC or privileged EXEC mode.

show ip interface [ type number ] [ topology { name | all | base } ] [stats]

Syntax Description

type

(Optional) Interface type.

number

(Optional) Interface number.

topology

(Optional) Displays IP traffic statistics related to a particular topology.

name

(Optional) The topology instance.

all

(Optional) Displays statistics for all topologies.

base

(Optional) Displays base topology statistics.

stats

(Optional) Displays IP traffic statistics without topology awareness, that is, an aggregate of all topologies is displayed.

Command Default

The Cisco IOS software automatically enters a directly connected route in the routing table if the interface is usable. A usable interface is defined as one that can send and receive packets. If an interface is not usable, the directly connected routing entry is removed from the routing table. Removing the entry allows the software to use dynamic routing protocols to determine backup routes to the network, if any.

If the interface can provide two-way communication, the line protocol is marked up. If the interface hardware is usable, the interface is marked up.

If you specify an optional interface type and number, you see information for that specific interface.

If you specify no optional arguments, you see information on all the interfaces.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

Use the show ip interface command to display IP traffic statistics. When the stats keyword is used by itself, this command displays IP traffic statistics without topology awareness (an aggregate of all topologies). When the topology name keyword and argument are used, the statistics are limited to the IP traffic for that specific topology. The topology base keyword is reserved for IPv4 unicast base topology. Use the all keyword to display all topologies.

There are no statistics collected for the interface by default. Statistics collection for Multitopology Routing (MTR) is enabled by using the ip topology-accounting command in interface configuration mode.

Examples

The following is sample output from the show ip interface command:

Device# show ip interface FastEthernet 1/10 stats 

FastEthernet1/10       
	5 minutes input rate 0 bits/sec, 0 packet/sec,
	5 minutes output rate 0 bits/sec, 0 packet/sec,
	201 packets input, 16038 bytes
	588 packets output, 25976 bytes

The table below describes the significant fields shown in the display.

Table 5 show ip interface Field Descriptions

Field

Description

5 minutes input rate 0 bits/sec, 0 packets/sec,

The rate at which packets and bits are being sent into an interface.

5 minutes output rate 0/bits/sec, 0 packets/sec,

The rate at which packets and bits are being sent out of an interface.

201 packets input, 16038 bytes

The total number of packets and bytes sent into an interface.

588 packets output, 25976 bytes

The total number of packets and bytes sent out of an interface.

Related Commands

Command

Description

ip topology-accounting

Enables topology accounting for all IPv4 unicast topologies in the VRF associated with a particular interface.

show ip ospf interface

To display interface information related to Open Shortest Path First (OSPF), use the show ip ospf interface command in user EXEC or privileged EXEC mode.

show ip [ ospf ] [process-id] interface [ type number ] [brief] [multicast] [ topology { topology-name | base } ]

Syntax Description

process-id

(Optional) Process ID number. If this argument is included, only information for the specified routing process is included. The range is 1 to 65535.

type

(Optional) Interface type. If the type argument is included, only information for the specified interface type is included.

number

(Optional) Interface number. If the number argument is included, only information for the specified interface number is included.

brief

(Optional) Displays brief overview information for OSPF interfaces, states, addresses and masks, and areas on the device.

multicast

(Optional) Displays multicast information.

topology topology-name

(Optional) Displays OSPF-related information about the named topology instance.

topology base

(Optional) Displays OSPF-related information about the base topology.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

10.0

This command was introduced.

12.0(25)S

This command was modified. The brief keyword was added.

12.2(15)T

This command was modified. The brief keyword was added.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2(33)SRB

The multicast, topology, base, and topology-name keywords and argument were added.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

12.2(33)SRC

Support for the OSPF TTL Security Check feature was added.

15.0(1)M

This command was integrated into Cisco IOS Release 15.0(1)M.

15.1(3)S

This command was modified to display output when loop-free alternate (LFA) Fast Reroute (FRR) is enabled on an interface and whether it can be a protected or a protecting interface.

Examples

The following is sample output from the show ip ospf interface command when Ethernet interface 0/0 is specified. It shows that LFA and FRR is enabled on the interface and that it can be both a protected and a protecting interface.

Device# show ip ospf interface ethernet 0/0

Ethernet0/0 is up, line protocol is up
  Internet Address 192.168.254.202/24, Area 0
  Process ID 1, Router ID 192.168.99.1, Network Type BROADCAST, Cost: 10
  Topology-MTID    Cost    Disabled    Shutdown      Topology Name
        0           10        no          no            Base
  Transmit Delay is 1 sec, State DR, Priority 1
  Designated Router (ID) 192.168.99.1, Interface address 192.168.254.202
  Backup Designated router (ID) 192.168.254.10, Interface address 192.168.254.10
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
    Hello due in 00:00:05
  Supports Link-local Signaling (LLS)
  Cisco NSF helper support enabled
  IETF NSF helper support enabled
  Can be protected by per-prefix Loop-free FastReroute
  Can be used for per-prefix Loop-free FastReroute repair paths
  Index 1/1, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 1, maximum is 1
  Last flood scan time is 0 msec, maximum is 0 msec
  Neighbor Count is 1, Adjacent neighbor count is 1 
    Adjacent with neighbor 192.168.254.10  (Backup Designated Router)
  Suppress hello for 0 neighbor(s)

In Cisco IOS Release 12.2(33)SRB, the following sample output from the show ip ospf interface brief topology VOICE command shows a summary of information, including a confirmation that the Multitopology Routing (MTR) VOICE topology is configured in the interface configuration:

Device# show ip ospf interface brief topology VOICE

VOICE Topology (MTID 10)
Interface    PID   Area            IP Address/Mask    Cost  State Nbrs F/C
Lo0          1     0               10.0.0.2/32        1     LOOP  0/0
Se2/0        1     0               10.1.0.2/30        10    P2P   1/1

The following sample output from the show ip ospf interface brief topology VOICE command displays details of the MTR VOICE topology for the interface. When the command is entered without the brief keyword, more information is displayed.

Device# show ip ospf interface topology VOICE

                 VOICE Topology (MTID 10)
Loopback0 is up, line protocol is up
   Internet Address 10.0.0.2/32, Area 0
   Process ID 1, Router ID 10.0.0.2, Network Type LOOPBACK
   Topology-MTID    Cost    Disabled    Shutdown      Topology Name
         10          1         no          no            VOICE
   Loopback interface is treated as a stub Host Serial2/0 is up, line protocol is up
   Internet Address 10.1.0.2/30, Area 0
   Process ID 1, Router ID 10.0.0.2, Network Type POINT_TO_POINT
   Topology-MTID    Cost    Disabled    Shutdown      Topology Name
         10          10        no          no            VOICE
   Transmit Delay is 1 sec, State POINT_TO_POINT
   Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
     oob-resync timeout 40
     Hello due in 00:00:03
   Supports Link-local Signaling (LLS)
   Cisco NSF helper support enabled
   IETF NSF helper support enabled
   Index 1/1, flood queue length 0
   Next 0x0(0)/0x0(0)
   Last flood scan length is 1, maximum is 1
   Last flood scan time is 0 msec, maximum is 0 msec
   Neighbor Count is 1, Adjacent neighbor count is 1
     Adjacent with neighbor 10.0.0.1
   Suppress hello for 0 neighbor(s)

In Cisco IOS Release 12.2(33)SRC, the following sample output from the show ip ospf interface command displays details about the configured Time-to-Live (TTL) limits:

Device# show ip ospf interface ethernet 0
.
.
.
Strict TTL checking enabled
! or a message similar to the following is displayed
Strict TTL checking enabled, up to 4 hops allowed
.
.
.

The table below describes the significant fields shown in the displays.

Table 6  show ip ospf interface Field Descriptions

Field

Description

Ethernet

Status of the physical link and operational status of the protocol.

Process ID

OSPF process ID.

Area

OSPF area.

Cost

Administrative cost assigned to the interface.

State

Operational state of the interface.

Nbrs F/C

OSPF neighbor count.

Internet Address

Interface IP address, subnet mask, and area address.

Topology-MTID

MTR topology Multitopology Identifier (MTID). A number assigned so that the protocol can identify the topology associated with information that it sends to its peers.

Transmit Delay

Transmit delay in seconds, interface state, and device priority.

Designated Router

Designated router ID and respective interface IP address.

Backup Designated router

Backup designated router ID and respective interface IP address.

Timer intervals configured

Configuration of timer intervals.

Hello

Number of seconds until the next hello packet is sent out this interface.

Strict TTL checking enabled

Only one hop is allowed.

Strict TTL checking enabled, up to 4 hops allowed

A set number of hops has been explicitly configured.

Neighbor Count

Count of network neighbors and list of adjacent neighbors.

show ip ospf topology-info

To display Open Shortest Path First (OSPF) details about the topologies configured under the OSPF protocol instance, use the show ip ospf topology-info command in privileged EXEC mode.

show ip ospf [ [process-id] ] topology-info [multicast] [ topology { topology-name | base } ]

Syntax Description

process-id

(Optional) Process ID. If this argument is included, only information for the specified routing process is included.

multicast

(Optional) Displays information about multicast topologies.

topology topology-name

(Optional) Displays information about the named topology.

topology base

(Optional) Displays OSPF-related information about the base topology.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

Examples

The following example shows information about an OSPF routing process under the VOICE topology:

Device# show ip ospf topology-info topology VOICE

             OSPF Router with ID (10.0.0.2) (Process ID 1)
                 VOICE Topology (MTID 10)
  Topology priority is 120
  Number of areas transit capable is 0
  Initial SPF schedule delay 10 msecs
  Minimum hold time between two consecutive SPFs 20 msecs
  Maximum wait time between two consecutive SPFs 20000 msecs
     Area BACKBONE(0)
         SPF algorithm last executed 15:05:41.808 ago
         SPF algorithm executed 9 times
         Area ranges are

The table below describes the significant fields shown in the display.

Table 7  show ip ospf topology-info Field Descriptions

Field

Description

OSPF Router

Router ID and OSPF process ID.

VOICE Topology

Name of the OSPF topology and its MTR Topology ID (MTID).

Topology Priority

The priority that an OSPF process assigns to a topology instance for SPF calculations.

Number of areas transit capable

Number of OSPF areas that are transit-capable.

SPF algorithm last executed

Shows the last time an SPF calculation was performed in response to topology change event records.

SPF algorithm executed

Shows the number of times an SPF calculation was performed in response to topology change event records.

show ip protocols topology

To display the configuration and state of active routing protocol processes under a topology instance, use the show ip protocols topology command in user EXEC or privileged EXEC mode.

show ip protocols topology topology-name [summary]

Syntax Description

topology-name

Name of the topology.

summary

(Optional) Displays summary information.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

The show ip protocols topology command is used to display general routing information and routing protocol status under a topology instance. The topology name must be specified when entering this command.

Examples

The following example shows information about an OSPF routing process under the DATA topology:

Device# show ip protocols topology DATA 

*** IP Routing is NSF aware ***
Routing Protocol is "ospf 1"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 10.1.1.253
  It is an autonomous system boundary router
  Redistributing External Routes from,
  Number of areas in this router is 3. 3 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
  Routing Information Sources:
    Gateway         Distance      Last Update
  Distance: (default is 110)

The table below describes the significant fields shown in the display.

Table 8 show ip protocols topology Field Descriptions

Field

Description

Routing Protocol is...

Name and autonomous system or process number of currently running routing protocols.

Outgoing update filter list for all interfaces...

Indicates whether a filter for outgoing routing updates has been specified with the distribute-list out command.

Incoming update filter list for all interfaces...

Indicates whether a filter for incoming routing updates has been specified with the distribute-list in command.

Router ID

Displays the default or locally configured router ID.

Redistributing...

Indicates whether route redistribution has been enabled.

Automatic network summarization...

Indicates whether route summarization is enabled by default or with the auto-summary command. (Not shown in the example.)

Number of areas...

Indicates the number of locally configured areas on the device.

Maximum path

Displays the maximum number of multipaths that the routing process will support. This field displays the default or the number configured with the maximum-paths command.

Routing for Networks

Networks for which the routing process is currently injecting routes.

Routing Information Sources

Lists all the routing sources that the Cisco IOS software is using to build its routing table. The following is displayed for each source:

  • IP address
  • Administrative distance
  • Time the last update was received from this source

Distance

Number of internal and/or external distance metrics configured for the protocol.

The following example displays summary information about the topology DATA:

Device# show ip protocols topology DATA summary 

Index Process Name
0     connected
1     static
2     ospf 1
*** IP Routing is NSF aware ***

The table below describes the significant fields shown in the display.

Table 9 show ip protocols topology summary Field Descriptions

Field

Description

Index Process Name

Displays route source type and number of associated routes.

IP Routing is NSF aware

Indicates that the Cisco IOS software image is NSF aware.

Related Commands

Command

Description

clear ip route topology

Clears entries from the routing table of a topology.

ip route topology

Configures static routing under a topology instance.

ping topology

Diagnoses basic network connectivity through a topology instance.

show ip route topology

Displays entries in a topology routing table.

show topology

Displays status and configuration information for topologies configured with MTR.

show ip route multicast

To display multicast routes in the routing table, use the show ip route multicast command in user EXEC or privileged EXEC mode.

show ip route multicast [ vrf vrf-name ] [ host-name | ip-address [ mask ] [ longer-prefixes ] ] [ connected | protocol | static | summary | supernets-only | track-table ]

Syntax Description

vrf vrf-name

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

hostname ip-address

(Optional) Host name or IP address for a specific routing table entry.

mask

(Optional) Network mask.

longer-prefixes

(Optional) Specifies that only routes that match the hostname mask are displayed.

connected

(Optional) Specifies that only connected routes are displayed.

protocol

(Optional) Specifies that routes for the specified routing protocol are displayed. Enter the routing protocol as it displayed in the CLI help string.

static

(Optional) Specifies that only static routes are displayed.

summary

(Optional) Specifies that only summary routes are displayed.

supernets-only

(Optional) Specifies that only supernets are displayed.

track-table

(Optional) Displays backup static routes that are installed in the routing table via object tracking configuration.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

15.0(1)M

This command was integrated into Cisco IOS Release 15.0(1)M.

15.0(1)SY

This command was integrated into Cisco IOS Release 15.0(1)SY.

Usage Guidelines

Use the show ip route multicast command to display multicast routes in the routing table.

Examples

The following example shows how to display a summary of multicast routes:

Device# show ip route multicast summary

IP routing table name is multicast (0x8000)
IP routing table maximum-paths is 32
Route Source    Networks    Subnets     Replicates  Overhead    Memory (bytes)
connected       0           0           0           0           0
static          0           0           0           0           0
internal        0                                               20
Total           0           0           0           0           20

The table below describes the significant fields shown in the display.

Table 10 show ip route multicast summary Field Descriptions

Field

Description

IP routing table name

Name of the routing table.

IP routing table maximum paths

Maximum paths displayed in the routing table.

Route source

The source of the route.

Replicates

Number of routes replicated from one topology to another.

show ip route topology

To display entries in a topology routing table, use the show ip route topology command in user EXEC or privileged EXEC mode.

show ip route topology topology-name [ hostname | ip-address [mask] [longer-prefixes] ] [ connected | protocol | static | summary | supernets-only | track-table ]

Syntax Description

topology-name

Name of a topology instance.

hostname ip-address

(Optional) Hostname or IP address for a specific routing table entry.

mask

(Optional) Network mask.

longer-prefixes

(Optional) Specifies that only routes that match the ip-address mask pair are displayed.

connected

(Optional) Specifies that only connected routes are displayed.

protocol

(Optional) Routes for the specified routing protocol are displayed. Enter the routing protocol as it displayed in the CLI help string.

static

(Optional) Specifies that only static routes are displayed.

summary

(Optional) Specifies that only summary routes are displayed.

supernets-only

(Optional) Specifies that only supernets are displayed.

track-table

(Optional) Displays backup static routes that are installed in the routing table via object tracking configuration.

Command Default

No default behavior or values

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

The show ip route topology command is used to display routes installed in a topology routing table. The topology name must be specified when you enter this command.

Examples

The following example displays information for the 10.2.1.1 route under the DATA topology:

Device# show ip route topology DATA 10.2.1.1

Routing entry for 10.2.1.1/32
  Known via "connected", distance 0, metric 0 (connected)
  Routing Descriptor Blocks:
  * directly connected, via Ethernet1/0
      Route metric is 0, traffic share count is 1

The table below describes the significant fields shown in the display.

Table 11 show ip route topology with Address Field Descriptions

Field

Description

Routing entry for...

Network number and mask if configured.

Known via...

Indicates how the route was derived.

Routing Descriptor Blocks

Displays the next hop IP address followed by the information source.

Route metric

This value is the best metric for this routing descriptor block.

traffic share count

Number of uses for this routing descriptor block.

The following examples show the routing table of the DATA topology:

Device# show ip route topology DATA 

Routing Table: DATA
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, + - replicated route
Gateway of last resort is not set
      10.3.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.3.2.0/24 is directly connected, Ethernet2/0
L        10.3.2.1/32 is directly connected, Ethernet2/0
      10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C        10.1.1.0/25 is directly connected, Ethernet0/0
L        10.1.1.1/32 is directly connected, Ethernet0/0
C        10.1.1.128/25 is directly connected, Loopback0
L        10.1.1.253/32 is directly connected, Loopback0
C        10.2.1.0/25 is directly connected, Ethernet1/0
L        10.2.1.1/32 is directly connected, Ethernet1/0 

The table below describes the significant fields shown in the display.

Table 12 show ip route topology Field Descriptions

Field

Description

Routing Table

Name of the routing table.

Codes

Indicates the protocol that derived the route. The status codes are defined in the output.

10.3.2.2

Address of the remote network.

Ethernet...

Interface through which the specified network can be reached.

via...

Specifies the address of the next device to the remote network. (Not shown in the display.)

0:01:00

Specifies the last time the route was updated (in hours:minutes:seconds). (Not shown in the display.)

Related Commands

Command

Description

clear ip route topology

Clears entries from the routing table of a topology.

ip route topology

Configures static routing under a topology instance.

ping (MTR)

Pings a destination within a specific topology.

show ip route topology

Displays the current state of a topology routing table.

show topology

Displays status and configuration information for topologies configured with MTR.

show ip static route

To display the static process local Routing Information Base (RIB) information, use the show ip static route command in user EXEC or privileged EXEC mode.

show ip static route [bfd] [ vrf vrf-name ] [ topology topology-name ] [ ip-address [mask] ] [multicast] [summary]

Syntax Description

bfd

(Optional) Displays IPv4 static Bidirectional Forwarding Detection (BFD) neighbor information.

vrf vrf-name

(Optional) Name of the VRF by which static routing information should be displayed.

topology topology-name

(Optional) Static route information for the specified topology.

ip-address

(Optional) Address by which static routing information should be displayed.

mask

(Optional) Subnet mask.

multicast

(Optional) Displays IPv4 multicast information.

summary

(Optional) Displays summary information.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRC

The command output was enhanced to include BFD neighbor information.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

15.1(2)SNG

This command was implemented on the Cisco ASR 901 Series Aggregation Services Routers.

Examples

The following is sample output from the show ip static route command:

Device# show ip static route
 
Codes: M - Manual static, A - AAA download, N - IP NAT, D - DHCP,
       G - GPRS, V - Crypto VPN, C - CASA, P - Channel interface processor,
       B - BootP, S - Service selection gateway
       DN - Default Network, T - Tracking object
       L - TL1, E - OER
Codes in []: A - active, N - non-active, P - permanent

In Cisco IOS Release 12.2(33)SRC, the following is sample output for the show ip static route command:

Device# show ip static route
 
Codes: M - Manual static, A - AAA download, N - IP NAT, D - DHCP,
       G - GPRS, V - Crypto VPN, C - CASA, P - Channel interface processor,
       B - BootP, S - Service selection gateway
       DN - Default Network, T - Tracking object
       L - TL1, E - OER
Codes in []: A - active, N - non-active, B - BFD-tracked, P - permanent
Static local RIB for default 
M 10.2.2.2/32 [1/0] via Serial2/0 192.168.201.2 [N B]
M 10.0.0.0/8 [1/0] via Serial2/0 192.168.202.2 [N B]
M 10.2.0.0/8 [1/0] via Loopback0 [A]

The table below describes the significant fields shown in the display.

Table 13 show ip static route Descriptions

Field

Description

Codes

Indicates the protocol that derived the route. The status codes are defined in the output.

Static local RIB for default

Default static local RIB information.

M 10.2.2.2/32 [1/0] via Serial2/0 192.168.201.2 [N B]

Specifies the manually configured static route and the address of the next device to the remote network.

show ip static route bfd

To display information about the IPv4 static Bidirectional Forwarding Detection (BFD) configuration from specific configured BFD groups and nongroup entries, use the show ip static route bfd command in user EXEC or privileged EXEC mode.

show ip static route bfd [ interface-type interface-number [ destination-ip-address ] ] [ group [ group-name ] ] [ vrf destination-vrf-name ] [ destination-ip-address [ vrf source-vrf-name ] [ source-ip-address ] ]

Syntax Description

interface-type interface-number

(Optional) Interface type and interface number for which BFD is configured.

destination-ip-address

(Optional) Multihop BFD destination IP address or the gateway IP address.

group group-name

(Optional) Specifies a BFD group and group name.

vrf

(Optional) Specifies the Virtual Routing and Forwarding (VRF) instance.

destination-vrf-name

(Optional) Destination VRF name.

source-vrf-name

(Optional) Source VRF name.

source-ip-address

(Optional) Multihop BFD source IP address.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

15.1(2)S

This command was introduced.

15.1(1)SG

This command was integrated into Cisco IOS Release 15.1(1)SG.

15.1(1)SY

This command was integrated into Cisco IOS Release 15.1(1)SY.

15.2(3)S

This command was modified. The vrf keyword, and interface-type, interface-number, destination-ip-address, source-ip-address, destination-vrf-name, and source-vrf-name arguments were added.

Usage Guidelines

You can specify a BFD group for a set of BFD-tracked static routes. Nongroup entries are BFD-tracked static routes for which a BFD group is not specified. Use the ip route static bfd command to configure static route BFD neighbors.

Use the show ip static route bfd command to display information about the IPv4 static BFD configuration from specific configured BFD groups and nongroup entries. The group group-name keyword and argument specifies a BFD group and BFD group name.

Example:

The following is sample output from the show ip static route bfd group command:

Device# show ip static route bfd group group1
 
Codes in []: R - Reachable, U - Unreachable, L - Loop, D - Not Tracked
GigabitEthernet1/1 10.1.1.1 [U] [group1, Active]
GigabitEthernet1/2 10.2.2.2 [U] [group1, Passive]

The following table describes the significant fields shown in the display.

Table 14 show ip static route bfd group Field Descriptions

Field

Description

GigabitEthernet1/1

Interface for which the BFD session is initiated.

10.1.1.1

Next-hop IP address.

group1

BFD group name.

Active

Active member of the group.

GigabitEthernet1/2

Interface for which the BFD session is initiated.

10.2.2.2

Next-hop IP address.

Passive

Passive member of the group.

Related Commands

Command

Description

ip route static bfd

Specifies static route BFD neighbors.

show ip static route

Displays static route database information.

show ip static route summary

To display a global summary of the static process local Routing Information Base (RIB), use the show ip static route summary command in user EXEC or privileged EXEC configuration mode.

show ip static route summary

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Examples

The following example shows a global summary of the static routes:

Device# show ip static route summary
 
Allow inter-vrf: yes
Number of download routes: 0
Number of static routes: 20
Number of per user routes: 5
Download route version: 0

The table below describes the significant fields shown in the display.

Table 15 show ip static route summary Descriptions

Field

Description

Allow inter-vrf:

Routes across VRFs or confined to separate VRFs.

Number of download routes:

Number of routes downloaded.

Number of static routes:

The total number of static routes.

Number of per user routes:

The total number of routes per static route owner.

Download route version:

Version of the downloaded route.

show ip traffic (MTR)

To display statistics about IP traffic, use the show ip traffic command in privileged EXEC mode.

show ip traffic [ topology { name | all | base } ]

Syntax Description

topology

(Optional) Displays IP traffic statistics for a particular topology.

name

(Optional) Topology name.

all

(Optional) Displays statistics for all topologies.

base

(Optional) Displays base topology statistics.

Command Default

Statistics for all topologies are displayed.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

Use the show ip traffic command to display global IP traffic statistics (an aggregation of all the topologies when Multitopology Routing [MTR] is enabled) or statistics related to a particular topology. The base keyword is reserved for the IPv4 unicast base topology. The all keyword displays all topologies.

Examples

The following is sample output from the show ip traffic command for the VOICE topology:

Device# show ip traffic topology VOICE
  Topology: VOICE
  5 minute input rate 0 bits/sec, 0 packet/sec,
  5 minute output rate 0 bits/sec, 0 packet/sec,
  100 packets input, 6038 bytes,
  88 packets output, 5976 bytes.

The table below describes the significant fields shown in the display.

Table 16 show ip traffic Field Descriptions

Field

Description

5 minute input rate 0 bits/sec, 0 packets/sec,

The rate at which the system is processing incoming IP packets for the VOICE topology.

5 minute output rate 0/bits/sec, 0 packets/sec,

The rate at which the system is processing outgoing IP packets for the VOICE topology.

100 packets input, 6038 bytes

The total number of incoming packets and bytes processed for the VOICE topology.

88 packets output, 5976 bytes

The total number of outgoing packets and bytes processed for the VOICE topology.

show isis neighbors

To display information about Intermediate System-to-Intermediate System (IS-IS) neighbors, use the show isis neighbors command in privileged EXEC mode.

show isis neighbors [detail]

Syntax Description

detail

(Optional) Displays more detailed information for IS-IS neighbors.

Command Default

Brief information for IS-IS neighbors is displayed.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(18)S

This command was introduced.

12.3

This command was integrated into Cisco IOS Release 12.3.

12.0(29)S

This command was integrated into Cisco IOS Release 12.0(29)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2(33)SRB

The command output was modified to support the Multitopology Routing (MTR) feature.

12.2SX

This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

Usage Guidelines

The show isis neighbors command is used to display brief information about connected IS-IS devices. Enter the detail keyword to display more detailed information.

Examples

In Release 12.0(29)S, the show isis neighbors command is entered to display information about the IS-IS neighbor Device1.

Device5# show isis neighbors

System Id      Type Interface IP Address      State Holdtime Circuit Id
0000.0000.0002 L1   Et0/0     192.168.128.2   UP    21       R5.02              
0000.0000.0002 L2   Et0/0     192.168.128.2   UP    28       R5.02              

The show isis neighbors detail command is entered to display more detailed information about the IS-IS neighbor Device1.

Device5# show isis neighbors detail

System Id           Type Interface IP Address      State Holdtime Circuit Id
0000.0000.0002      L1   Et0/0     192.168.128.2   UP    21       R5.02              
  Area Address(es): 49.0001
  SNPA: aabb.cc00.1f00      
  State Changed: 00:00:52
  LAN Priority: 64
  Format: Phase V
0000.0000.0002      L2   Et0/0     192.168.128.2   UP    22       R5.02              
  Area Address(es): 49.0001
  SNPA: aabb.cc00.1f00      
  State Changed: 00:00:52
  LAN Priority: 64
  Format: Phase V

In Release 12.2(33)SRB, the show isis neighbors detail command is entered to verify the status of the IS-IS neighbor Device1 for a network that has MTR configured. For each of the topologies - unicast, DATA and VOICE, the interface information is displayed.

Device5# show isis neighbors detail

System Id      Type Interface IP Address      State Holdtime Circuit Id
0000.0000.0005 L2   Et0/0     192.168.128.2   UP    28       R5.01              
  Area Address(es): 33
  SNPA: aabb.cc00.1f00      
  State Changed: 00:07:05
  LAN Priority: 64
  Format: Phase V
  Remote TID:  100, 200
  Local TID:   100, 200

The table below describes the significant fields shown in the display.

Table 17 show isis neighbors Field Descriptions

Field

Description

System Id

Six-byte value that identifies a system in an area.

Type

Level type. Indicates whether the IS-IS neighbor is a Level 1, Level-1-2, or Level 2 device.

Interface

Interface from which the system was learned.

IP Address

IP address of the neighbor device.

State

Indicates whether the state of the IS-IS neighbor is up or down.

Holdtime

Link-state packet (LSP) holdtime. Amount of time that the LSP remains valid (in seconds).

Circuit Id

Port location for the IS-IS neighbor device that indicates how it is connected to the local device.

Area Address(es)

Reachable area addresses from the device. For Level 1 LSPs, these are the area addresses configured manually on the originating device. For Level 2 LSPs, these are all the area addresses for the area to which this device belongs.

SNPA

Subnetwork point of attachment. This is the data-link address.

State Changed

State change.

LAN Priority

Priority of the LAN.

Remote TID

Neighbor device topology IDs.

Local TID

Local device topology IDs.

show mtm table

To display information about the classifier values and the differentiated services code point (DSCP) values assigned to each topology, use the show mtm table command in user EXEC or privileged EXEC mode.

show mtm table

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

The show mtm table command shows the DSCP bits and classifier values that are mapped to the topologies for Multitopology Routing (MTR). The DSCP bits are used to mark the packet and assign traffic to a topology.

Examples

The following example displays the classifier and DSCP values for the VOICE and VIDEO topologies:

Device# show mtm table
 
MTM Table for VRF: default, ID:0
Topology                Address Family   Associated VRF         Topo-ID
base                    ipv4              default                 0       
VOICE                   ipv4              default                 2051    
Classifier: ClassID:3
DSCP: cs1 
DSCP: 9 
VIDEO                   ipv4              default                 2054    
Classifier: ClassID:4
DSCP: af11 

The table below describes the significant fields shown in the display.

Table 18 show mtm table Field Descriptions

Field

Description

MTM table

Displays the MTR translation manager table.

Topology

Name of the topology.

Classifier: ClassID:

Displays the class identifier.

DSCP:

DSCP code used to mark the packet. A subset of DSCP bits is used to encode classification values in the IP packet header.

Topo-ID

Topology identifier (TID). Each topology is configured with a unique TID.

show policy-map type class-routing ipv4 unicast

To display class-routing policy map information for Multitopology Routing (MTR), use the show policy-map type class-routing ipv4 unicast command in privileged EXEC mode.

show policy-map type class-routing ipv4 unicast [ interface [ interface-type interface-number ] ]

Syntax Description

interface

(Optional) Displays statistics on all interfaces under the global space.

interface-type interface-number

(Optional) Displays statistics on a specific interface.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Examples

The following example shows that the policy map MTR is attached to the voice and video topologies:

Device# show policy-map type class-routing ipv4 unicast
 
Policy Map type class-routing ipv4 unicast MTR
    Class VOICE-CLASS
      select-topology voice
    Class VIDEO-CLASS
      select-topology video

The following example shows statistics about the policy map named MTR and the voice and video topologies. The number of packets and total bytes on a per-class and per-interface basis are shown. There is also further granularity in the display output by showing per match statement statistics:

Device# show policy-map type class-routing ipv4 unicast interface ethernet 0/0

  Service-policy: MTR
    Class-map: VOICE-CLASS (match-any)
      10 packets, 600 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match:  dscp cs1 (8)
        10 packets, 600 bytes
        5 minute rate 0 bps
      select-topology voice
    Class-map: VIDEO-CLASS (match-any)
      15 packets, 900 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match:  dscp af43
        15 packets, 900 bytes
        5 minute rate 0 bps
      select-topology video

The table below describes the significant fields shown in the display.

Table 19 show policy-map type class-routing ipv4 unicast Field Descriptions

Field

Description

Service-policy:

Name of the service policy.

Class

Name of the class.

Class-map:

Class map to be used for matching packets to a specified class. Match any is the required behavior for MTR.

10 packets, 600 bytes

Number of packets and bytes per class and interface.

Match:

Identifies the DSCP value as a match criteria. Statistics are further refined to show statistics for packets with the specified DSCP value in the IP header.

select-topology

Name of the topology.

show snmp context mapping

To display information about Simple Network Management Protocol (SNMP) context mappings for Multitopology Routing (MTR), use the show snmp context mapping command in privileged EXEC mode.

show snmp context mapping

Syntax Description

This command has no arguments or keywords.

Command Default

No default behavior or values.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

Usage Guidelines

The SNMP agent software component on the device can be configured to pass a context string to existing MIB access functions by using the snmp context command. Network management applications can provide these context strings in SNMP transactions to direct those transactions to a specific virtual private network (VPN) routing and forwarding (VRF) instance, a specific topology, and/or routing protocol instance. The show snmp context mapping command displays information about the mapping of the context to the VRF, address family, topology, and protocol.

Examples

The following example displays the mapping of the context to the topology and protocol instance:

Device# show snmp context mapping

Context: ospf-voice
  VRF Name: 
  Address Family Name: ipv4
  Topology Name: voice
  Protocol Instance: OSPF-3 Router
Context: context-ospf
  VRF Name: 
  Address Family Name: 
  Topology Name: 
  Protocol Instance: OSPF-3 Router
Context: context-vrfA
  VRF Name: vrfA
  Address Family Name: 
  Topology Name: 
  Protocol Instance: 
Context: context-voice
  VRF Name: 
  Address Family Name: ipv4
  Topology Name: voice
  Protocol Instance:

The table below describes the significant fields shown in the display.

Table 20 show snmp context mapping Field Descriptions

Field

Description

Context:

The context string that is associated with the VRF, data topology, or protocol instance.

VRF Name:

VRF name.

Address Family Name:

Address family name. Currently, only the IPv4 address family (multicast and unicast) is supported.

Topology Name:

Name of the topology.

Protocol Instance:

Routing protocol that is associated with the context string.

Related Commands

Command

Description

snmp context

Creates an SNMP context for MTR.

show topology

To display status and configuration information for topologies configured with Multitopology Routing (MTR), use the show topology command in privileged EXEC mode.

show topology [ cache [ topology-id ] | ha [ detail | interface | lock | router ] [ all | ipv4 | ipv6 | vrf vpn-instance ] ]

Syntax Description

cache

(Optional) Displays cache topology information.

topology-id

(Optional) A topology ID in hexadecimal format.

ha

(Optional) Displays routing table high availability information.

detail

(Optional) Displays detailed routing topology instance information.

interface

(Optional) Displays the status of interfaces that are associated with a topology.

lock

(Optional) Displays topology lock information.

router

(Optional) Displays the status of topologies on a device.

all

(Optional) Displays all topologies.

ipv4

(Optional) Displays IPv4 topologies.

ipv6

(Optional) Displays IPv6 topologies.

vrf vpn-instance

(Optional) Displays topologies associated with a VPN.

Command Default

Information about all topologies is displayed.

Command Modes

Privileged EXEC (#)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

The show topology command is used to display configuration information for MTR. The output displays global mode, interface mode, and device mode configurations. The output can be filtered to display information for only specific address families and subaddress families or specific topologies.

Examples

The following example shows the topology name and status of base and class-specific topologies:

Device# show topology

Topology                    Address Family  Associated VRF  State
base                        ipv4            default         UP
VOICE                       ipv4            default         UP
base                                        default         UP

The table below describes the significant fields shown in the display.

Table 21 show topology Field Descriptions

Field

Description

Topology:

The topology name. This field will display base and class-specific topologies.

Address family

The address family and subaddress family.

Associated VRF

The VPN or VRF name is displayed if configured. VRF instances are shown as separate base topologies. The word “default” is displayed if no VRF is configured.

State

Status of the topology. The state will be displayed as UP or DOWN.

The following example shows detailed information about base and class-specific topologies:

Device# show topology detail

Topology: base
   Address-family: ipv4
   Associated VPN VRF is default
   Topology state is UP
   Associated interfaces:
     Ethernet0/0, operation state: UP
     Ethernet1/0, operation state: DOWN
     Serial2/0, operation state: DOWN
     Serial3/0, operation state: UP
Topology: VOICE
   Address-family: ipv4
   Associated VPN VRF is default
   Topology state is UP
   Associated interfaces:
     Ethernet0/0, operation state: UP
Topology: base
   Address-family:
   Associated VPN VRF is default
   Topology state is UP
   Route Replication Enabled:
     from unicast all
   Associated interfaces:
     Ethernet0/0, operation state: UP

The table below describes the significant fields shown in the display.

Table 22 show topology detail Field Descriptions

Field

Description

Topology

The topology name. This field will display base and class-specific topologies.

Address-family

The address family and subaddress family.

Associated VPN VRF is

The VPN or VRF name is displayed if configured. VRF instances are shown as separate base topologies. The word “default” is displayed if no VRF is configured.

Topology state is

Status of the topology. The state will be displayed as UP or DOWN.

Topology fallback is enabled (not shown)

This field is displayed when incremental forwarding mode is enabled when the forward-base command is configured under the global topology configuration.

Topology is enabled on all interfaces (not shown)

This field is displayed when a topology is configured to use all interfaces when the all-interfaces command is configured under the global topology configuration.

Route Replication Enabled:

This field is displayed when route replication is configured to be enabled.

Associated interfaces:

Lists all interfaces that are associated with a given topology. The list displays interfaces that are configured globally or individually.

operation state:

Status of the operation. The state will be displayed as UP or DOWN.

The following example shows information about the status of topologies on a route. The additional fields here show which IP routing protocols are configured for each topology.

Device# show topology router

Topology: base
   Address-family: ipv4
   Associated VPN VRF is default
   OSPF 2 Area 0
   IS-IS [name] Level-1
Topology: VOICE
   Address-family: ipv4
   Associated VPN VRF is default
   OSPF 2 Area 0
   IS-IS [name] Level-1
Topology: base
   Address-family: IPv4 multicast
   Associated VPN VRF is default
   OSPF 2 Area 0
   IS-IS [name] Level-1

The following example shows information about the status of each interface that is associated with a topology:

Device# show topology interface

Topology: base
   Address-family: ipv4
   Associated VPN VRF is default
   Topology state is UP
   Associated interfaces:
     Ethernet0/0, operation state: UP
      OSPF 2 metric: 10 state: UP
      IS-IS [name] metric (10,10) state: UP
Topology: VOICE
   Address-family: ipv4
   Associated VPN VRF is default
   Topology state is UP
   Associated interfaces:
     Ethernet0/0, operation state: UP
      OSPF 2 metric: 10 state: UP
      IS-IS [name] metric (10,10) state: UP
Topology: base
   Address-family: IPv4 multicast
   Associated VPN VRF is default
   Topology state is UP
   Associated interfaces:
     Ethernet0/0, operation state: UP
      OSPF 2 metric: 10 state: UP
      IS-IS [name] metric (10,10) state: UP

Related Commands

Command

Description

clear ip route topology

Clears entries from the routing table of a topology.

ip route topology

Configures static routing under a topology instance.

ping topology

Diagnoses basic network connectivity through a topology instance.

show ip protocols topology

Displays the configuration and state of active routing protocol processes under a topology instance.

show ip route topology

Displays the current state of a topology routing table.

shutdown (MTR)

To temporarily disable a topology instance without removing the topology configuration, use the shutdown command in address family topology configuration mode. To restart the topology instance, use the no form of this command.

shutdown

no shutdown

Syntax Description

This command has no arguments or keywords.

Command Default

The default state is enabled.

Command Modes

Address family topology configuration (config-af-topology)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

The shutdown (MTR) command is used to temporarily disable a topology without removing the topology configuration from the device. This command is useful for initial topology configuration. The topology can be placed in a shutdown state until the configuration is complete and the topology is ready to be deployed.

A topology is operationally disabled when it is shut down. No routing or forwarding occurs, and routing and forwarding tables are either empty or nonexistent when a topology is in a shutdown state.


Note


A topology cannot be placed in the shutdown state if referenced by any active policy map.


Examples

The following example configures the device to temporarily place the VOICE topology in a shutdown state:

Device(config)# global-address-family ipv4
Device(config-af)# topology VOICE
Device(config-af-topology)# all-interfaces
Device(config-af-topology)# forward-base
Device(config-af-topology)# shutdown
Device(config-af-topology)# end
 

Related Commands

Command

Description

all-interfaces

Configures a topology instance to use all interfaces on a device.

exit-topo

Exits address family topology configuration mode, and enters global address family configuration mode.

forward-base

Configures the forwarding mode under a topology instance.

maximum routes (MTR)

Sets the maximum number of routes that a topology instance will accept and install into the RIB.

topology (global)

Configures a topology instance.

snmp context

To create a Simple Network Management Protocol (SNMP) context for Multitopology Routing (MTR) for virtual networking, use the snmp context command in the appropriate command mode. To delete an SNMP context, use the no form of this command.

For SNMPv1 or v2c

snmp context context-name [ community community-name [ ro | rw ] ]

For SNMPv3

snmp context context-name [ user username [ credential | [encrypted] [ auth { md5 password | sha password } ] [ access { access-list-number | access-list-name | ipv6 access-list-name } ] ] ]

no snmp context context-name

Syntax Description

context-name

Name of the SNMP context being created.

community community-name

(Optional) In SNMPv2c, specifies an SNMP community string.

ro

(Optional) In SNMPv2c, specifies read-only access.

rw

(Optional) In SNMPv2c, specifies read/write access.

user username

(Optional) In SNMPv3, specifies an SNMP user.

credential

(Optional) In SNMPv3, specifies if a user password is already configured and saved.

encrypted

(Optional) In SNMPv3, specifies that passwords are Message Digest5 (MD5) or Secure Hash Algorithm (SHA) digests.

auth

(Optional) In SNMPv3, specifies authentication parameters for a user.

md5 password

(Optional) In SNMPv3, uses an Hash-based Message Authentication Code (HMAC) MD5 algorithm for authentication.

sha password

(Optional) In SNMPv3, uses an HMAC SHA algorithm for authentication.

access

(Optional) In SNMPv3, specifies an access list associated with a group.

access-list-number

(Optional) In SNMPv3, a standard access list number in the range of 1 to 99.

access-list-name

(Optional) In SNMPv3, an access list name.

ipv6 access-list-name

(Optional) In SNMPv3, specifies an IPv6 access list name.

Command Default

No SNMP contexts are configured.

Command Modes

Address family configuration (config-router-af)

Router address family topology configuration (config-router-af-topology)

Router configuration (config-router)

VRF address family configuration (config-vrf-af)

VRF configuration (config-vrf)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

Cisco IOS XE Release 3.1S

This command integrated into Cisco IOS XE Release 3.1S.

Cisco IOS XE Release 3.2S

This command was modified. All of the keywords were added, and all of the arguments except for context-name were added.

15.0(1)SY

This command was integrated into Cisco IOS Release 15.0(1)SY.

15.1(1)SG

This command was integrated into Cisco IOS Release 15.1(1)SG.

Cisco IOS XE Release 3.3SG

This command was integrated into Cisco IOS XE Release 3.3SG.

15.3(2)T

This command was integrated into Cisco IOS Release 15.3(2)T.

Usage Guidelines

When you use the no snmp context command, all SNMP instances in that context are deleted.

Examples

The following example shows how to create an SNMP context to be associated with VPN companyA:

Device(config)# ip vrf companyA
Device(config-vrf)# snmp context contextA

The following example shows how to create an SNMP context in VRF address family configuration mode to be associated with VPN companyA:

Device(config)# vrf definition companyA
Device(config-vrf)# address-family ipv4
Device(config-vrf-af)# snmp context contextA

Related Commands

Command

Description

address-family (VRF)

Selects an address family type for a VRF table and enters VRF address family configuration mode.

ip vrf

Configures a VRF routing table.

show snmp context mapping

Displays information about SNMP context mappings for MTR.

vrf definition

Configures a VRF routing table instance and enters VRF configuration mode.

topology (BGP)

To configure a Border Gateway Protocol (BGP) routing process to route IP traffic for the specified topology instance and to enter router scope address family topology configuration mode, use the topology command in router scope address family configuration mode. To disassociate the BGP routing process from the topology instance, use the no form of this command.

topology { topology-name | base }

no topology { topology-name | base }

Syntax Description

topology-name

Name of a class-specific topology. The argument is case-sensitive.

base

Specifies the base topology.

Command Default

No default behavior or values

Command Modes

Router scope address family configuration (config-router-scope-af)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

Usage Guidelines

The topology (BGP) command is used in a Multitopology Routing (MTR) configuration to enable a specific topology inside a BGP address family session. Command configurations after the topology command is entered apply only to the topology instance. The topology must first be defined globally using the global-address-family command in global configuration mode before the topology can be configured under the BGP routing session. The topology (BGP) command is entered under a BGP router scope hierarchy that includes an address family configuration.

Examples

The following example configures a BGP peering session with the 192.168.3.2 neighbor under the VOICE topology:

Device(config)# global-address-family ipv4
Device(config-af)# topology VOICE
Device(config-af-topology)# all-interfaces
Device(config-af-topology)# exit
Device(config-af)# exit
Device(config)# router bgp 45000
Device(config-router)# scope global
Device(config-router-scope)# bgp default ipv4-unicast
Device(config-router-scope)# neighbor 192.168.3.2 remote-as 50000 
Device(config-router-scope)# address-family ipv4 unicast 
Device(config-router-scope-af)# topology VOICE 
Device(config-router-scope-af-topo)# bgp tid 100 
Device(config-router-scope-af-topo)# neighbor 192.168.3.2 activate
Device(config-router-scope-af-topo)# end 

Related Commands

Command

Description

bgp tid

Configures BGP to accept routes with a specified topology ID.

global-address-family

Configures the BGP to accept routes with a specified topology ID.

scope

Defines the scope for a BGP routing session and enters router scope configuration mode.

show ip bgp topology

Displays topology instance information from the BGP table.

topology (EIGRP)

To configure an Enhanced Interior Gateway Routing Protocol (EIGRP) process to route IP traffic under the specified topology instance and to enter address-family topology configuration mode, use the topology command in address-family configuration mode. To disassociate the EIGRP routing process from the topology instance, use the no form of this command.

topology { base | topology-name tid number }

no topology topology-name

Syntax Description

base

Specifies the base topology.

topology-name

Topology name. The topology-name argument is case-sensitive.

tid number

Specifies the topology ID number. The range is 1 to 65535.

Command Default

EIGRP routing processes are not configured to route IP traffic under a topology instance.

Command Modes

Address-family configuration (config-router-af)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

15.0(1)M

This command was integrated into Cisco IOS Release 15.0(1)M.

12.2(33)XNE

This command was integrated into Cisco IOS Release 12.2(33)XNE.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5.

Usage Guidelines

The topology command is used in a Multitopology Routing (MTR) configuration to enable an EIGRP process under the specified topology. The topology command is entered under address-family configuration mode. Command configurations are applied only to the topology instance. The topology must be defined globally with the global-address-family command in global address-family configuration mode before the topology can be configured under the EIGRP process.

The tid keyword associates an ID with the topology instance. Each topology must be configured with a unique topology ID. The topology ID is used to identify and group Network Layer Reachability Information (NLRI) for each topology in EIGRP updates.

The topology ID must be consistent across devices so that EIGRP can correctly associate topologies.

Examples

The following example configures EIGRP process 1 to route traffic for the 192.168.0.0/16 network under the VOICE topology instance:

Device(config)# router eigrp 1 
Device(config-router)# address-family ipv4 unicast autonomous-system 3
Device(config-router-af)# topology VOICE tid 100
Device(config-router-af-topology)# no auto-summary
Device(config-router-af-topology)# network 192.168.0.0 0.0.255.255 
Device(config-router-af-topology)# end
 

Related Commands

Command

Description

clear ip eigrp

Resets EIGRP process and neighbor session information.

global-address-family ipv4

Enters global address family configuration mode to configure MTR.

topology (interface)

Configures an MTR topology instance on an interface.

topology (global)

To configure a global topology instance and enter routing topology configuration mode, use the topology command in global address family configuration mode. To disable the topology instance and remove from the device configuration, use the no form of this command.

topology { base | topology-name }

no topology { base | topology-name }

Syntax Description

base

Configures the topology instance to import the base topology. This keyword can only be accepted in IPv4 multicast families.

topology-name

Name of the topology instance. The topology-name argument is case-sensitive; VOICE and voice specify different topologies.

Command Default

No global topology instances are configured.

Command Modes

Global address family configuration (config-af)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

15.2(3)T

This command was integrated into Cisco IOS Release 15.2(3)T.

Usage Guidelines

Use the topology (global) command to configure a topology instance and enter routing topology configuration mode. Up to 32 unicast and a single multicast topology can be configured on a device. In routing topology configuration mode, the following global topology configuration parameters are applied:

  • Global interface configuration—The topology is configured on all interfaces by entering the all-interfaces command. All interfaces are removed from the topology by entering the no form of this command, which is the default.
  • Forwarding mode—The method that the device uses to look up forwarding entries in the FIB is configured by entering the forward-base command. Entering this command enables “incremental” forwarding mode. Entering the no form enables “strict” forwarding mode, which is the default. In strict mode, the device looks for a forwarding entry only within the class-specific topology FIB. If an entry is not found, the packet is dropped. In incremental mode, the device first looks in the class-specific topology FIB. If a covering forwarding entry is not found, the device then looks in the base topology FIB.
  • Maximum route limit—A limit for the number of routes that are permitted in the topology and installed to the topology RIB is configured by entering the maximum routes (MTR) command. This functionality is similar to routing and VPN maximum route features. No limit is the default.

Note


Per-interface topology configuration parameters override configurations applied in global address family topology configuration and routing topology configuration mode.


Examples

The following example creates a topology instance named VOICE. The device is configured to use incremental forwarding mode and to generate warning messages when 1000 routes have been accepted/installed in the VOICE topology RIB:

Device(config)# global-address-family ipv4 
Device(config-af)# topology VOICE
Device(config-af-topology)# forward-base
Device(config-af-topology)# maximum routes 1000 warn-only 

Related Commands

Command

Description

all-interfaces

Configures a topology instance to use all interfaces on a device.

exit-topo

Exits address family topology mode and enters global address family configuration mode.

forward-base

Configures the forwarding mode under a topology instance.

global-address-family

Enters global address family configuration mode to configure MTR.

maximum routes (MTR)

Sets the maximum number of routes that a topology instance will accept and install into the RIB.

shutdown

Temporarily disables a topology instance without removing the topology configuration.

topology (interface)

Configures an MTR topology instance on an interface.

topology (interface)

To configure a Multitopology routing (MTR) topology instance on an interface, use the topology command in interface configuration mode. To disable the topology interface configuration and configure the device to use global defaults, use the no form of this command.

topology ipv4 [ multicast | unicast ] { topology-name [disable] | base }

no topology ipv4 [ multicast | unicast ] { topology-name [disable] | base }

Syntax Description

ipv4

Specifies the IPv4 address family.

multicast

(Optional) Specifies the multicast subaddress family.

unicast

(Optional) Specifies the unicast address family.

topology-name

Specifies the name of the topology instance.

disable

(Optional) Disables the specified topology instance on the interface. Entering the no form of this command with this keyword enables the interface.

base

Specifies the base topology.

Command Default

Unicast subaddress family configuration mode is entered when no subaddress family is specified.

No interfaces are included in class-specific topologies unless explicitly configured.

Configuration applied with the all-interfaces command in routing topology configuration does not override individual interface configuration applied in interface topology configuration mode.

Command Modes

Interface configuration (config-if)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

15.2(3)T

This command was integrated into Cisco IOS Release 15.2(3)T.

Usage Guidelines

The topology command is used to apply specific topology configuration at the interface level. The address family must be specified when this command is entered. The subaddress family can be optionally specified. Entering this command in Interface configuration mode places the device in interface topology configuration mode. In this mode, Enhanced Interior Gateway Routing Protocol (EIGRP), Intermediate System-to-Intermediate System, and Open Shortest Path First (OSPF) interface-specific configuration can be applied.

Disabling a Topology Under an Interface

An interface topology configuration can be disabled or an interface can be excluded from global topology configuration by entering this command with the disable keyword. Entering the disable keyword for a base topology removes only specific base topology configuration that applies to a class-specific topology.

Examples

The following example applies an OSPF cost of 10 to routes learned through the topology VOICE. This configuration also disables the multicast topology VIDEO.

Device(config)# interface Ethernet 0/0 
Device(config-if)# topology ipv4 VOICE 
Device(config-if-topology)# ip ospf cost 10
Device(config-if-topology)# exit 
Device(config-if)# topology ipv4 multicast VIDEO disable 
Device (config-if)# 
end 

Related Commands

Command

Description

exit-if-topology

Exits interface topology configuration mode.

ip ospf cost (MTR)

Configures the OSPF interface cost under a topology instance.

ip ospf topology disable

Disables an OSPF process under a topology interface configuration.

topology (IS-IS)

To configure Intermediate System-to-Intermediate System (IS-IS) Multitopology Routing (MTR) support for a non-base topology or to enter a configuration sub-mode specific to an IPv4 multicast base topology, use the topology command in router address family configuration mode.

MTR Unicast for IPv4 or IPv6

topology topology-name tid number

MTR Multicast for IPv4

topology base

Syntax Description

base

(Required) Specifies the base topology and enters a configuration sub-mode specific to the IPv4 multicast base topology. This keyword is available only for MTR multicast for IPv4.

topology-name

(Required) Topology name. This argument is case-sensitive and is available only for MTR unicast for IPv4 and Ipv6.

tid number

(Required) Specifies the topology ID number. The range is 1 to 65535. This keyword and argument are available only for MTR unicast for IPv4 and IPv6.

Command Default

No default behavior or values

Command Modes

Router address family configuration

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Cisco IOS XE Release 2.5

This command was integrated into Cisco IOS XE Release 2.5

Usage Guidelines

The topology command is used in an MT configuration to enable an IS-IS instance under the base topology for IPv4 multicast, or to configure IS-IS support for a non-base topology. The topology command is entered under an address family configuration. Command configurations are applied to only the topology instance. The topology must be defined globally with the global-address-family command in global configuration mode before the topology can be configured under the IS-IS instance.

The tid keyword associates an ID with the topology instance. Each topology must be configured with a unique topology ID. The topology ID is used to identify and group Network Layer Reachability Information (NLRI) for each topology in IS-IS updates.

Examples

The following example configures the IS-IS DATA topology with a TID value of 200 for IPv4 unicast:

router isis
 net 33.3333.3333.3333.00
 metric-style wide
 address-family ipv4 unicast
  topology DATA tid 200
  end

The topology command is entered with the base keyword to specify the base topology for IPv4 multicast base topology:

router isis
 net 33.3333.3333.3333.00
 metric-style wide
 address-family ipv4 multicast
  topology base

Related Commands

Command

Description

address-family (IS-IS)

Configures the exchange of address family and subaddress family prefixes.

topology (interface)

Configures an MTR topology instance on an interface.

topology (OSPF)

To configure an Open Shortest Path First (OSPF) process to route IP traffic under the specified topology instance, use the topology command in address family configuration mode. To remove the OSPF routing process from the topology instance, use the no form of this command.

topology { base | topology-name tid number }

no topology { base | topology-name tid number }

Syntax Description

base

Specifies the base topology.

topology-name

Topology name. This argument is case-sensitive; VOICE and voice specify different topologies.

tid number

Specifies a topology ID number. The range is 5 to 4095.

Note   

The topology ID must be entered during initial configuration. This keyword and argument is optional for subsequent configuration of the same topology instance.

Command Default

OSPF assigns the ID number 0 to the base unicast topology and the number 1 to the base multicast topology.

Command Modes

Address family configuration

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

Usage Guidelines

The topology command is used in Multitopology Routing (MTR) configuration to enable an OSPF process under the specified topology. The topology command is entered under router address family configuration. Entering the topology command places the device in router address family topology configuration mode. Subsequent commands that are configured are applied to only the specified topology instance. The topology must be defined globally with the global-address-family command in global configuration mode before the topology can be configured under the OSPF process.

Multicast Base Topology

The base keyword is used to enter the base topology when a multicast subaddress family configuration is created. Entering the no form of this command for a multicast configuration does not remove the base topology, only the command configurations that were entered in this mode.


Note


The base keyword is accepted for only IPv4 multicast. The tid keyword is accepted for only IPv4 and IPv6 unicast.


Topology ID

The topology ID must be specified with the tid keyword when this command is first entered. This keyword is optional for subsequent configuration. The topology ID cannot be changed after a topology instance is configured. You must first remove the topology instance from the device configuration and then reconfigure the topology instance with a new topology ID.

Examples

The following example creates the VOICE topology instance and configures the topology ID 100:

Device(config)# router ospf 1 
Device(config-router)# address-family ipv4 
Device(config-router-af)# topology VOICE tid 100
Device(config-router-af-topology)# end
 

Related Commands

Command

Description

address-family (OSPF)

Configures address family and subaddress family IP prefix exchange.

topology-accounting

To enable topology accounting on all of the interfaces in the global address family for the default VRF instance, use the topology-accounting command in global address family configuration mode. To disable statistics collection from all interfaces that are part of default VRF, use the no form of this command.

topology-accounting

no topology-accounting

Syntax Description

This command has no arguments or keywords.

Command Default

No topology accounting statistics are collected.

Command Modes

Global address family configuration (config-af)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Usage Guidelines

Use this command to enable topology accounting on all of the interfaces in the global address family for all IPv4 unicast topologies in the default VRF instance. Enabling this command does not impact interfaces in other VRF instances. Statistic collection is enabled and information is collected and accumulated from interfaces that belong in the default VRF and are participating in one or more IPv4 topologies.

The no form of this command disables statistics collection from all interfaces that are part of the default VRF instance. The no form of this command does not disable statistics collection from interfaces on which the ip topology-accounting command has been configured.

Examples

The following example shows how to enable topology accounting on all interfaces in the global address family for all IPv4 unicast topologies in the default VRF instance:

Device(config)# global-address-family ipv4
Device(config-af)# topology-accounting
 

Related Commands

Command

Description

ip topology-accounting

Enables topology accounting for all IPv4 unicast topologies in the VRF associated with a particular interface.

traceroute

To discover the routes that packets will actually take when traveling to their destination address, use the traceroute command in user EXEC or privileged EXEC mode.

traceroute [ vrf vrf-name | topology topology-name ] [protocol] destination

Syntax Description

vrf vrf-name

(Optional) Specifies the name of a VPN virtual routing and forwarding (VRF) instance table in which to find the destination address. The only keyword that you can select for the protocol argument when you use the vrf vrf-name keyword-argument pair is the ip keyword.

topology topology-name

(Optional) Specifies the name of the topology instance. The topology-name argument is case-sensitive; “VOICE” and “voice” specify different topologies.

protocol

(Optional) Protocol keyword, either appletalk, clns, ip, ipv6, ipx, oldvines, or vines. When not specified, the protocol argument is based on an examination by the software of the format of the destination argument. The default protocol is IP.

destination

(Optional in privileged EXEC mode; required in user EXEC mode) The Destination address or hostname you want to trace of the route. The software determines the default parameters for the appropriate protocol and the tracing action begins.

Command Default

When not specified, the protocol argument is determined by the software examining the format of the destination argument. For example, if the software finds a destination argument in IP format, the protocol value defaults to IP.

Command Modes

User EXEC (>)

Privileged EXEC (#)

Command History

Release

Modification

10.0

This command was introduced.

12.0(5)T

The vrf vrf-name keyword and argument were added.

12.2(2)T

This command was modified, support for IPv6 was added.

12.0(21)ST

This command was modified, support for IPv6 was added.

12.0(22)S

This command was modified, support for IPv6 was added.

12.2(11)T

The traceroute command test characters for IPv6 were updated. A new error message was added.

12.2(14)S

This command was integrated into Cisco IOS Release 12.2(14)S.

12.3(5)

This command was modified, a line was added to the interactive traceroute vrf command, so that you can resolve the autonomous system number through the use of the global table or a VRF table, or you can choose not to resolve the autonomous system.

12.0(26)S1

This command was integrated into Cisco IOS Release 12.0(26)S1.

12.2(20)S

This command was integrated into Cisco IOS Release 12.2(20)S.

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.

12.2(25)SG

This command was integrated into Cisco IOS Release 12.2(25)SG.

12.2(33)SRA

This command was integrated into Cisco IOS Release 12.2(33)SRA.

12.2(33)SRB

The topology topology-name keyword-argument pair was added to support Multitopology Routing (MTR).

12.2(33)SXH

This command was integrated into Cisco IOS Release 12.2(33)SXH.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

Cisco IOS XE Release 3.2S

This command was modified. When the vrf keyword is used, the output displays the incoming VRF name/tag and the outgoing VRF name/tag.

15.0(1)SY

This command was modified. When the vrf keyword is used, the output displays the incoming VRF name/tag and the outgoing VRF name/tag.

15. 2 (2)SNI

This command was implemented on the Cisco ASR 901 Series Aggregation Services Routers.

Usage Guidelines

The traceroute command works by taking advantage of the error messages generated by devices when a datagram exceeds its hop limit value.

The traceroute command starts by sending probe datagrams with a hop limit of 1. Including a hop limit of 1 with a probe datagram causes the neighboring devices to discard the probe datagram and send back an error message. The traceroute command sends several probes with increasing hop limits and displays the round-trip time for each.

The traceroute command sends out one probe at a time. Each outgoing packet might result in one or more error messages. A time-exceeded error message indicates that an intermediate device has seen and discarded the probe. A destination unreachable error message indicates that the destination node has received and discarded the probe because the hop limit of the packet reached a value of 0. If the timer goes off before a response comes in, the traceroute command prints an asterisk (*).

The traceroute command terminates when the destination responds, when the hop limit is exceeded, or when the user interrupts the trace with the escape sequence. By default, to invoke the escape sequence, simultaneously press and release the Ctrl, Shift, and 6 keys, and then pressing the X key.

To use nondefault parameters and invoke an extended traceroute test, enter the command without a protocol or destination argument in privileged EXEC mode then follow a series of steps to select the desired parameters. Extended traceroute tests are not supported in user EXEC mode. The user-level traceroute feature provides a basic trace facility for users who do not have system privileges. The destination argument is required in user EXEC mode.

If the system cannot map an address for a hostname, it returns a “%No valid source address for destination” message.

If the vrf vrf-name keyword-argument pair is used, the topology option is not displayed because only the default VRF instance is supported. The topology topology-name keyword-argument pair and the DiffServ Code Point (DSCP) option in the extended traceroute system dialog are displayed only if a topology is configured on the device.

In Cisco IOS XE Release 3.2S, output of the traceroute command with the vrf keyword was enhanced to make troubleshooting easier by displaying the incoming VRF name/tag and the outgoing VRF name/tag.

Examples

After you enter the traceroute command in privileged EXEC mode, the system prompts you for a protocol. The default protocol is IP.

If you enter a hostname or address on the same line as the traceroute command, the default action is taken as appropriate for the protocol type of that name or address.

The following example is sample output from the traceroute command using default values in privileged EXEC mode. The specific output varies somewhat from protocol to protocol.

Device# traceroute
Protocol [ip]:
Target IP address: 
Source address:
DSCP Value [0]: ! Only displayed if a topology is configured on the device.
Numeric display [n]:
Timeout in seconds [3]:
Probe count [3]:
Minimum Time to Live [1]:
Maximum Time to Live [30]:
Port Number [33434]:
Loose, Strict, Record, Timestamp, Verbose [none]:

The following example displays output available in Cisco IOS XE Release 3.2S and later. Output of the traceroute command with the vrf keyword includes the incoming VRF name/tag and the outgoing VRF name/tag.

Device# traceroute vrf red 10.0.10.12 
Type escape sequence to abort.
Tracing the route to 10.0.10.12
VRF info: (vrf in name/id, vrf out name/id)
  1 10.1.13.15 (red/13,red/13) 0 msec
    10.1.16.16 (red/13,red/13) 0 msec
    10.1.13.15 (red/13,red/13) 1 msec
  2 10.1.8.13 (red/13,red/13) 0 msec
    10.1.7.13 (red/13,red/13) 0 msec
    10.1.8.13 (red/13,red/13) 0 msec
  3 10.1.2.11 (red/13,blue/10) 1 msec 0 msec 0 msec
  4  *  *  *

Related Commands

Command

Description

ping (MTR)

Pings a destination within a specific topology for MTR.

use-topology

To configure a multicast topology to perform Reverse Path Forwarding (RPF) computations using a unicast topology Routing Information Base (RIB), use the use-topology command in address family topology configuration mode. To disable RPF computations using a unicast topology RIB, use the no form of this command.

use-topology unicast { base | topology-name }

no use-topology unicast { base | topology-name }

Syntax Description

unicast

Specifies a unicast sub-address family.

base

Specifies a base topology.

topology-name

A class-specific unicast topology.

Command Default

No default behavior or values.

Command Modes

Address family topology configuration (config-af-topology)

Command History

Release

Modification

12.2(33)SRB

This command was introduced.

12.2(33)SRE

This command was integrated into Cisco IOS Release 12.2(33)SRE.

15.0(1)M

This command was integrated into Cisco IOS Release 15.0(1)M.

15.0(1)SY

This command was integrated into Cisco IOS Release 15.0(1)SY.

Usage Guidelines

When this command is configured, the multicast topology uses routes in the specified unicast topology table to build multicast distribution trees.

This multicast RIB is not used when this command is enabled, even if the multicast RIB is populated and supported by a routing protocol.

Examples

The following example shows how to configure a multicast topology to perform RPF computations using a unicast topology RIB:

Device(config)# ip multicast-routing 
Device(config)# ip multicast rpf multitopology 
Device(config)# global-address-family ipv4 multicast 
Device(config-af)# topology base 
Device(config-af-topology)# use-topology unicast base