[nsp] 2950 Broadcast Storm

Daniel Quiambao danielq at 1-net.com.sg
Wed Mar 10 23:17:33 EST 2004



Hi there,

Thanks for all your reply.
However, is there a formula to calculate the percentage (or threshold) of the
broadcast storm need to be block.

Let say, I have a 100Mbps FE Port that has an average of utilisation of 50Mbps.
When applying a treshold level,
should I set it to 50%?

Thanks
Daniel






Cristian BICA <bcd at rdsnet.ro> on 03/10/2004 07:16:33 PM

To:   cisco-nsp at puck.nether.net
cc:   "'cisco-nsp at puck.nether.net'" <cisco-nsp at puck.nether.net> (bcc: Daniel
      Quiambao/ENGR/1-Net)

Subject:  Re: [nsp] 2950 Broadcast Storm



-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


checkout bugid CSCdp30543 before configuring anything

http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCdp30543&Submit=Search


On Wednesday 10 March 2004 12:53, Stork, D.H. (Duncan) wrote:
> Hi,
> I suppose you mean the following?
> Switch(config-if)# storm-control broadcast level [high level] [lower
> level]
>
> [high level]
> Specifies the upper threshold levels for broadcast traffic. The storm
> control action occurs when traffic utilization reaches this level.
>
> Optional:
> [lower level]
> Specifies the falling threshold level. The normal transmission
> restarts (if the action is filtering) when traffic drops below this
> level for interfaces that support software-based suppression.
>
> Then configure the action to take:
> Switch(config-if)# storm-control action {shutdown | trap}
>
> If you don't set a particular action it will filter out the broadcast
> traffic and not send out traps.
> The "shutdown" keyword puts the port in an error-disable state during
> a storm. If the [lower level] is not set, the port remains in
> shutdown state until you set it to "no shut"
> The "trap" keyword sends out an SNMP trap when a storm is detected.
>
> Kind regards,
>
> Duncan Stork
>
>
>
> -----Oorspronkelijk bericht-----
> Van: Daniel Quiambao [mailto:danielq at 1-net.com.sg]
> Verzonden: woensdag 10 maart 2004 10:31
> Aan: 'cisco-nsp at puck.nether.net'
> Onderwerp: [nsp] 2950 Broadcast Storm
>
>
>
>
> Hi there,
>
> I am trying to limit the broadcast storm on the 2950 switch, but I
> can't find a
> recommendation from Cisco.
> I understand that to limit broadcast storm is depend on the port
> utilization,
> any better suggestion?
>
> Thanks
> Daniel
>
>
> ====================
> Important: This message (including any attachments) contains
> privileged and confidential information and is intended to be
> conveyed only to the designated
> recipient(s).  If you are not an intended recipient, please notify
> the sender
> immediately and then delete this message from your system. You must
> not use, disseminate, distribute, or reproduce this message or any
> part thereof in any
> form. Any statement or information contained in this message not of
> an official
> nature shall not be deemed to be given or endorsed by MediaCorp or
> its relevant
> subsidiaries unless otherwise indicated by an authorised
> representative independent of this message.
>
> Disclaimer:  Risks are inherent in all internet communication.  While
> steps may
> have been taken to try to eliminate viruses and other harmful code or
> device from this message and its attachment(s) (if any), the sender
> is not responsible,
> and hereby disclaims all liabilities arising from or in relation to
> any viruses
> and/or other harmful code and/or device.  Each recipient is
> responsible for protecting its system from viruses and/or other
> harmful code and/or device. ====================
>
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

- --


Cristian  Bica  --  Network  Engineer
Romania Data Systems NOC in Bucharest
T:+4021 30 10 888  F: +4021 30 10 892
www.rdsnet.ro cristian.bica at rdsnet.ro
GPG:     http://bcd.rdsnet.ro/bcd.asc
- -------------------------------------
Privileged/Confidential Information may be contained in this message. If
you are not the addressee indicated in this message (or responsible for
delivery of the message to such person), you may not copy or deliver
this message to anyone. In such a case, you should destroy this message
and kindly notify the sender by reply e-mail.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)

iD8DBQFATvkRK+0nZmbYMUERAi9SAKCrHRoeXyi+xE+qIP/n/CAFse4UEQCgjKEp
3mSI2QMAIqxY/VoY5R/djRk=
=cwxt
-----END PGP SIGNATURE-----
_______________________________________________
cisco-nsp mailing list  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/






More information about the cisco-nsp mailing list