RE: traffic suppression - storm control 3560

Thanks

From: Michael Kiefer [mailto:mjkiefer_at_gmail.com]
Sent: Thursday, February 02, 2012 12:42 PM
To: Aaron
Cc: Cisco certification; Paul Negron
Subject: RE: traffic suppression - storm control 3560

Bcast storm control also impacts mcast. Mcast does not impact bcast.

I've never done both at the same time. I would assume the most specific
command mcast would take priority over the bcast statement.

Michael Kiefer

Sent from my Droid Bionic

On Feb 2, 2012 12:04 PM, "Aaron" <aaron1_at_gvtc.com> wrote:

Thanks Michael/Paul, wow Mike, just back from passing the lab and already
giving back to the community ! die hard

Does bcast suppression affect mcast?

Does mcast suppression affect bcast?

If I did BOTH mcast and bcast traff suppression (aka storm control) on the
same interface, would I want to treat this in any special way? There is a 1
in the least significant bit of the most significant byte in a bcast
(fffff...) frame too.

Aaron

-----Original Message-----
From: Paul Negron [mailto:negron.paul_at_gmail.com]
Sent: Thursday, February 02, 2012 9:06 AM
To: Michael Kiefer; Aaron
Cc: Cisco certification
Subject: Re: traffic suppression - storm control 3560

I think Aaron understands that point very well.

 I think what he was asking was ....."Does the feature affect both types of
traffic in the same way"?

Is that correct Aaron?

Paul

--
Paul Negron
CCIE# 14856 CCSI# 22752
Senior Technical Instructor
> From: Michael Kiefer <mjkiefer_at_gmail.com>
> Reply-To: Michael Kiefer <mjkiefer_at_gmail.com>
> Date: Thu, 2 Feb 2012 08:56:56 -0500
> To: Aaron <aaron1_at_gvtc.com>
> Cc: Cisco certification <ccielab_at_groupstudy.com>
> Subject: Re: traffic suppression - storm control 3560
(I meant to say it has a 1 as the least significant bit of the most
significant byte.)
>
> A multicast is a broadcast, but a broadcast is not a multicast.
>
> Remember that the storm control features are layer 2 based.
>
> Broadcast is FF:FF:FF:FF:FF:FF
> Mulicast starts with 01: for IPv4
>
> http://en.wikipedia.org/wiki/Multicast_address
>
> HTH,
>
> Michael Kiefer
>
> CCIE#34420 (R&S)
>
>
>
>
>
>
>
> On Thu, Feb 2, 2012 at 8:39 AM, Aaron <aaron1_at_gvtc.com> wrote:
>
>> Does bcast and mcast storm control have anything to do with each other or
>> are they treated completely separate?  Just wondering if there is any
>> subtleties or inter-relationships that bcast and mcast have with one
>> another
>> in 3560 storm control/traffic suppression.
>>
>>
>>
>> Aaron
>>
>> switch(config-if)#storm-control ?
>>
>>  action     Action to take for storm-control
>>
>>  broadcast  Broadcast address storm control
>>
>>  multicast  Multicast address storm control
>>
>>  unicast    Unicast address storm control
>>
>>
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