All things related to multicast

[Havard Eidnes <>]

> Can you send sh ip pim rp-map or what's the command ??

Well, we run pure pim-sm with statically configured RPs (in
NORDUnet we use the anycast-RP hack), and s-gw and sw-gw agree
that 193.10.252.1 is the RP for 233.2.171.1, and for those two
routers the nearest RP is the one at sw-gw.

Are you perhaps thinking of "show ip pim rp-hash"?  Not sure what
that would tell you; here's the output from the two routers I'm
focusing on:

s-gw>show ip pim rp 233.2.171.1
Group: 233.2.171.1, RP: 193.10.252.1, v2, uptime 05:44:23, expires never
s-gw>show ip pim rp-hash 233.2.171.1
No RP available for this group
s-gw>

sw-gw>show ip pim rp 233.2.171.1
Group: 233.2.171.1, RP: 193.10.252.1, v2, next RP-reachable in 00:00:55
sw-gw>show ip pim rp-hash 233.2.171.1
No RP available for this group
sw-gw>

> This reminds me the problem, I was trying to point to you some
> months ago - the router did not have any RP info and therefore
> did not forward any PIM joins as everything was handled in
> dense (although he claims forward/sparse -)), which could have
> then everything in prune status ...

Sorry; must have forgotten to reply to that one.  I'm not sure
how the router can revert to dense-mode behaviour with each and
every interface configured for "ip pim sparse", though:

sw-gw>sh ip pim int

Address          Interface    Version/Mode    Nbr   Query     DR
                                              Count Intvl
193.10.252.137   POS0/1       v2/Sparse        1    30     0.0.0.0
193.10.252.185   POS0/2       v2/Sparse        1    30     0.0.0.0
193.10.252.134   POS1/0       v2/Sparse        1    30     0.0.0.0
0.0.0.0          POS1/1       v2/Sparse        0    30     0.0.0.0
212.1.196.162    POS1/2       v2/Sparse       *1    30     0.0.0.0
193.10.252.193   POS1/3       v2/Sparse        1    30     0.0.0.0
195.159.247.58   POS2/0       v2/Sparse       *1    30     0.0.0.0
193.10.252.177   POS3/0       v2/Sparse       *1    30     0.0.0.0
193.10.252.211   SRP4/0       v2/Sparse        3    30     193.10.252.212
sw-gw>

s-gw>sh ip pim int

Address          Interface    Version/Mode    Nbr   Query     DR
                                              Count Intvl
193.10.252.205   POS0/0       v2/Sparse       *1    30     0.0.0.0
193.10.252.229   POS0/1       v2/Sparse       *1    30     0.0.0.0
193.10.252.45    POS0/2       v2/Sparse       *1    30     0.0.0.0
193.10.252.210   SRP1/0       v2/Sparse        3    30     193.10.252.212
195.219.88.138   POS2/0       v2/Sparse       *0    30     0.0.0.0
195.219.88.142   POS2/1       v2/Sparse       *0    30     0.0.0.0
193.10.252.129   POS3/0       v2/Sparse        1    30     0.0.0.0
193.10.252.41    POS4/0       v2/Sparse        1    30     0.0.0.0
s-gw>


Regards,

- Håvard