[c-nsp] FWSM blocking multicast traffic between two hosts in sameVlan?

[David Prall]

Is the FWSM your default gateway. If so you need something to act as the PIM
Router in order for IGMP Snooping to work correctly. I'm not sure if the
FWSM can do this. You could also configure your switch as an IGMP snooping
queurier if no PIM Router is present.

David

--
http://dcp.dcptech.com
  

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Joann Deng
> Sent: Friday, August 31, 2007 5:22 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] FWSM blocking multicast traffic between two 
> hosts in sameVlan?
> 
> Hi,
> 
> We have hosts in the same Vlan, which connects to FWSM
> (routed mode). These two hosts run WebLogic, which
> uses multicast address 237.155.155.2 to communicate.
> But somehow, when run "ping 237.155.155.2" on one
> host, cannot see response back from the other.
> So, is it possible that FWSM is doing something fancy,
> like blocking multicast traffic, and we need to add
> some configs?
> Any input is highly appreciated.
> 
> Thanks,
> 
> Joann
> 
> 
>        
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