[c-nsp] Multicast

David Barak thegameiam at yahoo.com
Mon Apr 15 07:03:13 EDT 2013

I've seen that before when the RPF interface is one where PIM is not enabled.  Have you double checked  to make sure that PIM is up, working, and has neighbors on all of the interfaces (don't forget loopbacks)?

David Barak

Sent from a mobile device, please forgive autocorrection.

On Apr 15, 2013, at 4:53 AM, M K <gunner_200 at live.com> wrote:

> The Unicast routing table is fine , I have checked all OSPF enabled and routes are advertised correctlyI am wondering if R3 is suffering from RPF check , why the rp mapping appeared ?
> R3#sh ip rpf information for ? (  RPF interface: GigabitEthernet0/0.34  RPF neighbor: ? (  RPF route/mask:  RPF type: unicast (ospf 9)  Doing distance-preferred lookups across tables  RPF topology: ipv4 multicast base, originated from ipv4 unicast base
> R6#sh ip rpf failed, no route existsR6#ping souR6#ping source lo0Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds:Packet sent with a source address of !!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 8/20/52 ms
> From: gunner_200 at live.com
> To: cisco-nsp at puck.nether.net
> Subject: Multicast
> Date: Mon, 15 Apr 2013 09:21:19 +0300
> Hi allI have the below topology
> R2 -- R3 --  R5 |       |       |R7 -- R4 -- R6
> I have enabled multicast-routing on all the topology (ip pim sparse-mode on all interfaces)I have configured R7 to be my RP
> ip pim bsr-candidate Loopback0 0ip pim rp-candidate Loopback0 priority 200
> Now , the issue is on R3 i have turned on R3 debug ip pim bsr
> R3#sh ip pim rp mapping PIM Group-to-RP Mappings
> Group(s)  RP (?), v2    Info source: (?), via bootstrap, priority 200, holdtime 150         Uptime: 07:48:54, expires: 00:02:27
> I can see the rp mapping but in the log messages
> *Apr 15 09:10:07.395: PIM-BSR(0): bootstrap ( on non-RPF path GigabitEthernet0/0.23 or from non-RPF neighbor discarded*Apr 15 09:10:07.399: PIM-BSR(0): bootstrap forwarded on Loopback0*Apr 15 09:10:07.403: PIM-BSR(0): bootstrap forwarded on GigabitEthernet0/0.23*Apr 15 09:10:07.403: PIM-BSR(0): bootstrap forwarded on GigabitEthernet0/0.35*Apr 15 09:10:07.407: PIM-BSR(0): bootstrap ( on non-RPF path Loopback0 or from non-RPF neighbor discarded
> ?
> On R5 and R6 , i cannot see any informationR5#sh ip pim rp mapping PIM Group-to-RP Mappings
> BR,                                                   
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