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

[Xavier Beaudouin]

On Mon, 5 Nov 2007, Tassos Chatzithomaoglou wrote:

> What kind of multicast are these?

I do some sampling multicast with random tickets inside. But the real 
application is financial data.

> Do you have a dump?

Yup. Given in a private messagE.

> Maybe you could try enabling bpdufilter on this port.

Ok I will try.

/Xavier

> --
> Tassos
>
> Xavier Beaudouin wrote on 5/11/2007 3:25 ??:
>> 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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>
>

--
Xavier Beaudouin - http://oav.net/