[nsp] 2950 Broadcast Storm

[Daniel Quiambao]

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



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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
>
>
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- --


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
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