TP wrote:
> 
> Thank you at all for your support.
> Just few comments (sorry for delay but when you are working I'm
> sleeping ;)).
> 
> - I can not configure the 3550 as router. I can not change IP
> and subnet for
> many reasons.
> - I can not configure VLAN, I've no chance to configure here
> inter vlan
> routing
> - I've bought 3550 because of IGMP snooping...but It seems that
> it does not
> work

Teresa,

When I went to the Software Advisor on CCO, IGMP Snooping didn't show up as
a supported option for the 3550.  Did your sales team lead you astray?  I'd
take them to task if they did...

> 
> Maybe access-list  or something based on mac control can help
> us to avoid that
> our tests based on multicast traffic floods on all the LAN.
> 
> I can configure the multicast address (so I can know the
> multicast layer 2
> mac).
> Wich is the configuration (if any) I've to set on fastethernet
> 0/1 in order to
> avoid that the specific multicast mac go out from this port?
> 
> Anybody knows why switchport block multicast doesn't take any
> effect?

Sounds as if your hardware is new.  Can you open a TAC case?

> 
> 
> Thank you again and have a nice week end.
> Teresa
> 
> 
> 
>   ----- Original Message -----
>   From: Priscilla Oppenheimer
>   To: [EMAIL PROTECTED]
>   Sent: Friday, July 04, 2003 5:35 AM
>   Subject: RE: avoid multicast storming on catalyst fe [7:71820]
> 
> 
>   Couldn't you use a VLAN? Maybe that's too much work since
> you're just
>   testing though.... But VLANs divide broadcast/multicast
> domains...
> 
>   Priscilla
> 
>   TP wrote:
>   >
>   > Dear Group,
>   >
>   > I need help about multiscast.
>   > This is a simple topology... I've to test some video
> streamer
>   > devices so I
>   > must generate multicast traffic.
>   > All video devices are connected to a catalyst 3550xl.
>   > We can reach the office LAN  through the same catalyst, in
>   > particular from/by
>   > fastethernet0/1.
>   >
>   > I must avoid that multicast traffic genereted locally 
> floods
>   > the LAN creating
>   > excessive traffic.
>   > Can I achieve this?
>   >
>   > This is the configuration runnig...it doesn't work. I mean
>   > when I generate
>   > multicast traffic it crosses  fe0/1 and reachs the rest of
> the
>   > LAN
>   > degrading network performance.
>   >
>   > Any help will be appreciated.
>   > Thank you.
>   > Teresa
>   >
>   >
>   > interface FastEthernet0/1
>   >  switchport protected
>   >  switchport block multicast
>   >  no ip address
>   >  storm-control multicast level 20.00
>   >
>   > System image file is
>   > "flash:c3550-i9q3l2-mz.121-11.EA1/c3550-i9q3l2-mz.121-11.EA
>   > 1.bin"
> 
> 




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