[c-nsp] Multicast forwarding but not forwarding (sup720)

[Chris Griffin]

Sounds a lot like CSCsb06413, but that should be fixed in SXF.  You 
might try the workaround anyway and see what happens...

Peter Salanki wrote:
> I have a weird issue on one of mine c65k/sup720. According to sh ip 
> mroute/sh mls ip multicast it is forwarding the flow, but when I tcpdump 
> on the egress interface, there is no packets.
> 
> This switch is the RP. I have gotten it work on another c65k/sup720.
> 
> c6509-tule#sh ip mroute 239.254.11.43
> 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
>        V - RD & Vector, v - Vector
> Outgoing interface flags: H - Hardware switched, A - Assert winner
> Timers: Uptime/Expires
> Interface state: Interface, Next-Hop or VCD, State/Mode
> 
> (*, 239.254.11.43), 3d05h/00:02:39, RP 213.80.98.4, flags: SJC
>   Incoming interface: Null, RPF nbr 0.0.0.0
>   Outgoing interface list:
>     Vlan666, Forward/Sparse, 00:04:38/00:02:15
>     Vlan301, Forward/Dense, 02:33:18/00:00:00
>     Vlan300, Forward/Dense, 00:34:36/00:00:00
> 
> (195.178.178.99, 239.254.11.43), 3d05h/00:02:53, flags: TA
>   Incoming interface: Vlan300, RPF nbr 85.24.151.2, RPF-MFD
>   Outgoing interface list:
>     Vlan666, Forward/Sparse, 00:04:38/00:02:15, H
>     Vlan301, Forward/Dense, 02:33:18/00:00:00, H
> 
> c6509-tule#sh ip mroute 239.254.11.43 ac
> Active IP Multicast Sources - sending >= 4 kbps
> 
> Group: 239.254.11.43, (?)
>    Source: 195.178.178.99 (?)
>      Rate: 439 pps/4729 kbps(1sec), 4729 kbps(last 10 secs), 353 
> kbps(life avg)
>     
> 
> c6509-tule#sh mls ip multicast group 239.254.11.43
> Multicast hardware switched flows:
> (195.178.178.99, 239.254.11.43) Incoming interface: Vlan300, Packets 
> switched: 9270037
> Hardware switched outgoing interfaces:
>         Vlan301 Vlan666
> RPF-MFD installed
> 
> 
> Total hardware switched flows : 1
> 
> 
> But:
> Vlan666 is up, line protocol is up
> --SNIP--
>   5 minute input rate 2000 bits/sec, 3 packets/sec
>   5 minute output rate 2000 bits/sec, 3 packets/sec
> 
> and tcpdump confirms. I'm running 12.2(33)SRA but this issue existed on 
> the SXF aswell. I appreciate any suggestions
> 
> Sincerely
> 
> Peter Salanki
> Chief Network Engineer
> Bahnhof AB (AS8473)
> www.bahnhof.se
> Office: +46855577132
> Cell: +46709174932
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

-- 
Chris Griffin                                cgriffin at ufl.edu
Sr. Network Engineer - CCNP                  Phone: (352) 392-2061
Network Services / Florida LambdaRail        Fax:   (352) 392-9440
University of Florida                        Gainesville, FL 32611