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

[Peter Salanki]

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I found an interesting twist on this one, if I do "no mls ip  
multicast" it works, hence it seems to be some problem with hardware  
multicast replication. Any suggestion on this?

The system is equiped with:
c6509-tule#sh mod
Mod Ports Card Type                              Model               
Serial No.
- --- ----- -------------------------------------- ------------------  
- -----------
   1   48  SFM-capable 48-port 10/100 Mbps RJ45   WS-X6548-RJ-45      
SAD055205K9
   3   16  SFM-capable 16 port 1000mb GBIC        WS-X6516-GBIC       
SAD061300GB
   5    2  Supervisor Engine 720 (Active)         WS-SUP720-3BXL      
SAD08450529

and the multicast ports are on module 3.

3 jul 2006 kl. 22.55 skrev 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

Med vänliga hälsningar

Peter Salanki
Nätansvarig
Bahnhof AB (AS8473)
www.bahnhof.se
Kontor: +46855577132
Mobil: +46709174932



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