MTR in VRF

The MTR in VRF feature extends to IPv4 VRF contexts the Cisco IOS software's capability that allows users to configure one or more non-congruent multicast topologies in global IPv4 routing context. These contexts can be used to forward unicast and multicast traffic over different links in the network, or in the case of non-base topologies to provide a Live-Live multicast service using multiple non-congruent multicast topologies mapped to different (S,G) groups.

Information About MTR in VRF

MTR in VRF Overview

The MTR in VRF feature extends to IPv4 VRF contexts, Cisco IOS software's capability that allows users to configure one or more non-congruent multicast topologies in global IPv4 routing context. These contexts can be used to forward unicast and multicast traffic over different links in the network, or in the case of non-base topologies to provide a Live-Live multicast service using multiple non-congruent multicast topologies mapped to different (S,G) groups.

The Cisco IOS Software allows a set of attributes, primarily used by BGP/MPLS L3VPNs, to be configured on a per-address family basis within a VRF. The MTR in VRF feature allows these attributes to be independently configured for the multicast sub-address families within a VRF address family.

How to Configure VRF in MTR

Configuring MTR in VRF

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. vrf definition vrf-name
  4. rd route-distinguisher
  5. ipv4 multicast multitoplogy
  6. address-family ipv4
  7. exit-address-family
  8. address-family ipv4 multicast
  9. topology topology-instance-name
  10. all-interfaces
  11. exit
  12. exit-address-family
  13. exit
  14. interface type number
  15. interface type number
  16. vrf forwarding vrf-name
  17. ip address ip-address mask
  18. ip pim sparse-dense-modeip
  19. end

DETAILED STEPS

  Command or Action Purpose

Step 1

enable

Example:

Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 3

vrf definition vrf-name

Example:

Device(config)# vrf definition vd1

Configures a VRF routing table and enters VRF configuration mode.

Step 4

rd route-distinguisher

Example:

Device(config-vrf)# rd 10:1

Creates routing and forwarding tables for a VRF.

Step 5

ipv4 multicast multitoplogy

Example:

Device(config-vrf)# ipv4 multicast multitoplogy

Enables IPv4 multicast support for multi-topology routing (MTR) in a VRF instance.

Step 6

address-family ipv4

Example:

Device(config-vrf)# address-family ipv4

Specifies the IPv4 address family type and enters address family configuration mode.

Step 7

exit-address-family

Example:

Device(config-vrf-af)# exit-address-family

Exits address family configuration mode and removes the IPv4 address family.

Step 8

address-family ipv4 multicast

Example:

Device(config-vrf)# address-family ipv4 multicast

Specifies the IPv4 address family multicast type and enters VRF address family configuration mode.

Step 9

topology topology-instance-name

Example:

Device(config-vrf-af)# topology red

Specifies a topology instance and a name to it and enters VRF address family topology configuration mode.

Step 10

all-interfaces

Example:

Device(config-vrf-af-topology)# all-interfaces

Configure the topology instance to use all interfaces on the device.

Step 11

exit

Example:

Device(config-vrf-af-topology)# exit

Exits VRF address-family topology configuration mode and enters VRF address-family configuration mode.

Step 12

exit-address-family

Example:


Device(config-vrf-af)# exit-address-family

Exits address family configuration mode and removes the IPv4 address family.

Step 13

exit

Example:


Device(config-vrf)# exit

Exits VRF configuration mode and enters global configuration mode.

Step 14

interface type number

Example:

Device(config)# interface ethernet 0/1

Selects the Ethernet interface and enters the interface configuration mode.

Step 15

interface type number

Example:

Device(config)# interface ethernet 0/1

Selects the Ethernet interface and enters the interface configuration mode.

Step 16

vrf forwarding vrf-name

Example:

Device(config-if)# vrf forwwarding vrf1

Associates a VRF instance with the interface.

Step 17

ip address ip-address mask

Example:

Device(config-if)# ip address 10.1.10.1 255.255.255.0

Sets a primary or secondary IP address for an interface.

Step 18

ip pim sparse-dense-modeip

Example:

Device(config-if)# ip pim sparse-dense-mode

Enables Protocol Independent Multicast (PIM) on an interface.

Step 19

end

Example:

Device(config-if)# end

Exits the interface configuration mode and enters privileged EXEC mode.

Configuring Examples for MTR in VRF

Example for MTR in VRF 


Device> enable
Device# configuration terminal
Device(config)# vrf definition vd1
Device(config-vrf)# rd 10:1
Device(config-vrf)# ipv4 multicast multitoplogy
Device(config-vrf)# address-family ipv4
Device(config-vrf)# exit-address-family
Device(config-vrf)# address-family ipv4 multicast
Device(config-vrf-af)# topology red
Device(config-vrf-af-topology)# all-interfaces
Device(config-vrf-af-topology)# exit
Device(config-vrf-af)# exit-address-family
Device(config-vrf)# exit
Device(config)# vrf forwarding vrf1
Device(config)# ip address 10.1.10.1 255.255.255.0
Device(config)# ip pim sparse-dense-mode
Device(config)# end

Additional References for MTR in VRF

Related Documents

Related Topic

Document Title

Multitopology Routing (MTR) commands

Cisco IOS Multitopology Routing Command Reference

IP multicast commands

Cisco IOS Multicast Command Reference

IP multicast concepts and tasks

IP Multicast Configuration Guide Library

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Feature Information for MTR in VRF

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.