[c-nsp] Cat4500 High CPU with Multicast Stream

[Antonio Soares]

Thanks, I'm feeling better now :)

So in my case, one 4500 with "ip routing" enabled and "ip multicast-routing"
disabled, what could be simple and quick to implement ?

I'm think about storm-control multicast in all ports (all ports are .1q
trunks in this case). The 4500 is the L2 aggregator and first hop router.


Thanks.

Regards,

Antonio Soares, CCIE #18473 (R&S/SP)
amsoares at netcabo.pt
http://www.ccie18473.net



-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Phil Mayers
Sent: quarta-feira, 13 de Julho de 2011 16:34
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Cat4500 High CPU with Multicast Stream

On 07/13/2011 04:03 PM, Antonio Soares wrote:

> Now my question, is this limitation specific to the 4500's ? Or does
> it mean that we can bring down any catalyst network with a good
> multicast stream ???

High traffic to 224.0.0.0/24 breaks a *lot* of kit. It's not just Cisco 
or Catalyst.

Applications emitting lots of traffic to this range should be considered 
no different to applications emitting lots of traffic to the broadcast 
address; they're broken and should be disconnected from the network.

>
> This is scaring... Guys, what methods do you use to control this ?

Disciplinary procedures.
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