Mapping an RP to an specific group in IPV6

From: Jorge Cortes <jorge.cortes.cano_at_gmail.com>
Date: Sun, 14 Feb 2010 21:29:20 -0600

Hi Team,

When trying to map an RP to an specific multicast ipv6 group how
should the access-list be defined?

For instance I'm trying to map the RP to just group FF08::8/128. I
have tried with the following two access-list but none seems to work:

ipv6 access-list LIMITGROUP
 permit ipv6 any host FF08::8

ipv6 access-list LIMITGROUP
 permit ipv6 host FF08::8 any

The ipv6 pim configuration is as follows:

ipv6 pim bsr candidate bsr FC07:541::21B:2AFF:FE53:6838
ipv6 pim bsr candidate rp FC07:541::21B:2AFF:FE53:6838 group-list LIMITGROUP

However when I issue the command "show ipv6 pim range-list" I don't
see an elected RP via BSR for any group, and when issue the command
"show ipv6 mroute" I see that the RP is any (::)

R1#sh ipv6 pim range-list
Static SSM Exp: never Learnt from : ::
  FF33::/32 Up: 00:36:23
  FF34::/32 Up: 00:36:23
  FF35::/32 Up: 00:36:23
  FF36::/32 Up: 00:36:23
  FF37::/32 Up: 00:36:23
  FF38::/32 Up: 00:36:23
  FF39::/32 Up: 00:36:23
  FF3A::/32 Up: 00:36:23
  FF3B::/32 Up: 00:36:23
  FF3C::/32 Up: 00:36:23
  FF3D::/32 Up: 00:36:23
  FF3E::/32 Up: 00:36:23
  FF3F::/32 Up: 00:36:23

R1#sh ipv6 mroute
Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group,
       C - Connected, L - Local, I - Received Source Specific Host Report,
       P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set,
       J - Join SPT
Timers: Uptime/Expires
Interface state: Interface, State

(*, FF08::8), 00:36:15/never, RP ::, flags: SPCL
  Incoming interface: Null
  RPF nbr: ::
  Immediate Outgoing interface list:
    Serial0/0/0.1, Null, 00:36:15/never

However when I remove the "group-list" argument from the candidate RP,
the RP is elected for all multicast groups (which is expected); so I
must be incorrectly defining the access-list, but I just don't know
what the correct format is.

Thanks,

Jorge

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Received on Sun Feb 14 2010 - 21:29:20 ART

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