Re: Storm control in 3550 and 3560 switches

Hi,

It's different for 3560, the documentation states only multicast traffic is
blocked for storm control multicast method.

When the storm control threshold for multicast traffic is reached, all
multicast traffic except control traffic, such as bridge protocol data unit
(BDPU) and Cisco Discovery Protocol (CDP) frames, are blocked. However, the
switch does not differentiate between routing updates, such as OSPF, and
regular multicast data traffic, so both types of traffic are blocked.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_se/configuration/guide/swtrafc.html

Lejoe

On Mon, Sep 14, 2009 at 10:01 AM, Anantha Subramanian Natarajan <
anantha.natarajan_at_gravitant.com> wrote:

> Hi All,
>
> My understanding on ,Multicast storm control on 3550 switch is as below
>
> "When the rate of multicast frames increased more than the specified rate
> on the Multicast storm-control configuration,it will block all multicast
> frames exceeded and also even all unicast/broadcast traffic is dropped
> until
> the multicast rate on the port is decreased than the threshold
> defined.Exceptions would be BPDU's and CDP frames".
>
> Is my above understanding right ?.If so ,my questions is
>
> Does the above statement is also true for 3560 switches.For some reason.I
> couldn't find a reference on the 3560 config guide,unless I missed it.
>
> Thank you for the assistance.
>
> Regards
> Anantha Subramanian Natarajan
>
>
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Received on Mon Sep 14 2009 - 13:25:11 ART