Re: Regarding multicast

Hi Raghav,

Over the top off my head, here is a quick one

For Ques 1 - Have you configured R-6 as the RP ? if you are using
sparse-mode you should have the ip pim auto-rp listener command on
R-6, as well as on other routers in the multicast domain.Could you
post your configs for R6, R2 and R5.

For Ques 2 - R3 will not have the entries for 224.0.1.39, since it has
not been configured as a MA(which I presume). 224.0.1.39 is the group
which a router listens on when it is configured as a MA.

For ques 3 - The command that you said will send the RP announcements
i.e to the group address 224.0.1.39 with a source address of the
loopback0 interface. If you have sparse-mode on F0/0 , the router
checks to see if the auto-rp listener command is enabled , if not it
will not be able to send the announcements.The interface will not know
that it has to send the announcement, you have enabled it to send the
announcement using the command ip pim send-rp-announce through all pim
enabled interfaces.

Lastly, come on man!! its just been 1 hour that you posted your
question..why so anxious ;-)

HTH,
Ravi

On Tue, Jun 2, 2009 at 7:35 AM, Raghav Bhargava
<raghavbhargava12_at_gmail.com> wrote:
> Hi Experts,
>
> This is my topology:-
>
> R3 ,<-----FR------> R5
> | |
> | |
> FR FR
> | |
> | |
> R6 <----Fa ---> R2 R4
>
>
> I am using PIM SM on all the Interfaces. I enabled PIm SM-SM on R2 and R6 on
> Loopback interfaces so that both of them become RP for the group 224.x.x.x.
> Now my query is on R5, when i do show ip mroute 224.0.1.39, I get this
> output:-
>
> r5#show ip mroute 224.0.1.39
> IP Multicast Routing Table
> Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
> L - Local, P - Pruned, R - RP-bit set, F - Register flag,
> T - SPT-bit set, J - Join SPT, M - MSDP created entry,
> X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
> U - URD, I - Received Source Specific Host Report,
> Z - Multicast Tunnel, z - MDT-data group sender,
> Y - Joined MDT-data group, y - Sending to MDT-data group
> Outgoing interface flags: H - Hardware switched, A - Assert winner
> Timers: Uptime/Expires
> Interface state: Interface, Next-Hop or VCD, State/Mode
>
> (*, 224.0.1.39), 00:16:59/stopped, RP 0.0.0.0, flags: DP
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list: Null
>
> (2.2.2.2, 224.0.1.39), 00:00:57/00:02:02, flags: PT
> Incoming interface: Serial0/0.52, RPF nbr 10.1.25.2
> Outgoing interface list: Null
>
> But I am not getting the (S,G) Tree for the Loopback of R6. For R2 I can see
> 2.2.2.2 but not for R6 which should be 6.6.6.6. I don't know why R5 is not
> getting that. This is my first question??
>
> My second question is will R3 also have 2 entries :- one from R2 i.e---
> 2.2.2.2 and one from R6 i.e--- 6.6.6.6. If yes then I don see anyone of them
> on R3. When I do show ip mroute 224.0.1.39 on R3 it says group 224.0.1.39
> not found.???
>
> Please can anyone advise....
>
>
> --
> Warm Regards
> Raghav
>
>
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Received on Tue Jun 02 2009 - 08:24:45 ART