It might be useful to see additional information such as: c3845#show ip igmp interface gi0/1.180
c3845#show ip igmp groups and maybe a debug of one of the host multicast groups: c3845#debug ip igmp x.x.x.x -Rich >Message: 2 >Date: Wed, 27 Jun 2007 15:55:04 +0300 >From: Matti Saarinen <[EMAIL PROTECTED]> >Subject: [c-nsp] C3845 not processing IGMP reports >To: [email protected] >Message-ID: <[EMAIL PROTECTED]> >Content-Type: text/plain; charset=us-ascii > > >What could be causing the following problem with Cisco 3845 and IGMP >reports? > >We've got a 3845 running 12.4(13a) which appears not to process IGMP >reports which are sent to it. The host is sendind IGMP reports for a >group (tcpdump shows them) but the 3845 doesn't see them according to >the output from debug ip igmp. The IGMP queries sent by the router are >seen by the host. Also, when the host sends an IGMP leave packet the >router sees it. > >The subnet the host belongs to is connected to a GE sub interface which >is dot1q tagged. There is a HP 5308 between the host and 3845 but it >isn't processing IGMP at all. > >Below is some config info: > >c3845#show run int gi0/1.180 >[...] >interface GigabitEthernet0/1.180 > description nnnn > encapsulation dot1Q 180 > ip address x.x.x.x > ip helper-address y.y.y.y > ip helper-address z.z.z.z > ip pim sparse-mode >end > >c3845#sh ip multicast interface gi0/1.180 >GigabitEthernet0/1.180 is up, line protocol is up > Internet address is x.x.x.x/24 > Multicast routing: enabled > Multicast switching: fast > Multicast packets in/out: 4/92094 > Multicast TTL threshold: 0 > Multicast Tagswitching: disabled > > >Cheers, > >-- >- Matti - > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
