Nexus7700: IPv6 SSM configuration

[ANDREAS LIEBE]

I want to configure SSM IP-Range on a Nexus 7700 running 8.4(7)

According to https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus7000/sw/multicast/config/cisco_nexus7000_multicast_routing_config_guide_8x/m_configuring_pim_and_pim6.html the command is

ipv6 pim ssm range FF30::0/96

But the command is unknown to the switch:

cores101(config)# ipv6 pim ?
  allow-rp              Sparse-Mode RP addresses to be allowed
  anycast-rp            Configure an RP in an Anycast-RP set (using PIM6)
  bidir-rp-limit        Configures maximum Bidir RPs for IPv6 PIM in this VRF
  bsr                   Bootstrap protocol RP-distribution configuration
  bsr-candidate         Configure router as a Bootstrap Router candidate
  event-history         Configure event-history buffer
  flush-routes          Remove routes when restarting PIM6
  isolate               Isolate this router from IPV6 PIM perspective
  log-neighbor-changes  Log up/down PIM6 neighbor transitions
  register-policy       Specify policy for receiving Register messages
  register-rate-limit   Rate limit for PIM data registers
  rp-address            Configure static RP for group range
  rp-candidate          Configure router as a Rendezvous Point (RP) candidate
  spt-threshold         Source-tree switching threshold
  state-limit           Configures State limit
  use-shared-tree-only  Use (*,G) only state, no source state is created

feature pim
feature pim6

is enabled.

Any hint how to set the SSM range?

Regards,

Andreas

[Harold Ritter]

Hi @ANDREAS LIEBE ,

I am not to sure why this command is missing from 8.4(7). That being said, you can still use SSM with the default range. It is normally recommended to use the default range by the way.

switch# sh ipv6 pim group-range
PIM Group-Range Configuration for VRF "default"
Group-range Action Mode RP-address
Shared-tree-range Origin
ff32::/32 Accept SSM -
- Local
ff33::/32 Accept SSM -
- Local
ff34::/32 Accept SSM -
- Local
ff35::/32 Accept SSM -
- Local
ff36::/32 Accept SSM -
- Local
ff37::/32 Accept SSM -
- Local
ff38::/32 Accept SSM -
- Local
ff39::/32 Accept SSM -
- Local
ff3a::/32 Accept SSM -
- Local
ff3b::/32 Accept SSM -
- Local
ff3c::/32 Accept SSM -
- Local
ff3d::/32 Accept SSM -
- Local
ff3e::/32 Accept SSM -
- Local

Regards,

[ANDREAS LIEBE]

Harold,

thank you for your quick response!

You're right, we should stick to the standard (e.g. rfc7346)

I became aware of the missing command when I noticed slightly different SSM defaults on NX-OS(ff32::/32) and IOS-XE (FF3F::/32) and looked for a way to align the configs:

nx-os# show ipv6 pim group-range 
PIM6 Group-Range Configuration for VRF "default"
Group-range Mode RP-address Shared-tree-only range
ff32::/32 SSM - -
ff33::/32 SSM - -
ff34::/32 SSM - -
ff35::/32 SSM - -
ff36::/32 SSM - -
ff37::/32 SSM - -
ff38::/32 SSM - -
ff39::/32 SSM - -
ff3a::/32 SSM - -
ff3b::/32 SSM - -
ff3c::/32 SSM - -
ff3d::/32 SSM - -
ff3e::/32 SSM - -

IOS-XE#show ipv6 pim range-list 
Static SSM Exp: never Learnt from : ::
FF33::/32 Up: 3d02h
FF34::/32 Up: 3d02h
FF35::/32 Up: 3d02h
FF36::/32 Up: 3d02h
FF37::/32 Up: 3d02h
FF38::/32 Up: 3d02h
FF39::/32 Up: 3d02h
FF3A::/32 Up: 3d02h
FF3B::/32 Up: 3d02h
FF3C::/32 Up: 3d02h
FF3D::/32 Up: 3d02h
FF3E::/32 Up: 3d02h
FF3F::/32 Up: 3d02h