[c-nsp] Cisco 3560G and multicast: how to filter multicast to a switchport ?

[Tassos Chatzithomaoglou]

What kind of multicast are these?
Do you have a dump?

Maybe you could try enabling bpdufilter on this port.

--
Tassos

Xavier Beaudouin wrote on 5/11/2007 3:25 μμ:
> Hello,
> 
> I have a problem with Multicast and Cisco 3560G.
> 
> We a have a data vlan with mixed unicast and multicast data.
> 
> We needs to filter multicast forwarding to a specific port and allow only 
> unicast because the device doesn't like at all multicast (cpu ... etC...).
> 
> 
> I did the following :
> 
> !
> interface GigabitEthernet0/3
>   switchport access vlan 8
>   switchport mode access
>   switchport nonegotiate
>   switchport protected
>   switchport block multicast
>   switchport block unicast
>   switchport port-security aging time 2
>   switchport port-security violation protect
>   switchport port-security aging type inactivity
>   switchport port-security aging static
>   flowcontrol receive on
>   storm-control multicast level pps 1 0
>   storm-control action trap
>   spanning-tree portfast
> end
> 
> But the port still gets some multicast (tcpdump for example show that), 
> and I cannot find a clue to forbid multicast on this port...
> 
> Any good advice ?
> 
> Thanks,
> /Xavier
> 
> --
> Xavier Beaudouin - http://oav.net/
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