topic Re: How to prevent a broadcast storm in Switches, Hubs, and Modems

How to prevent a broadcast storm

Yan Henrichon — Thu, 17 Sep 2009 17:42:18 GMT

A broadcast storm is at layer 2. Is the connection rate limit or Virus Throttleling is at layer 2 or 3? I guest is three but I just want to make sure.

My thoughts are in a way to findout how to prevent a broadcast storm on a network. You know, when a user plugs in two ports of an IP phone in the same switch that has only one VLAN or a Laptop and docking station that are both connected to the network.

Thank you.

Re: How to prevent a broadcast storm

Holger Hasenaug — Fri, 18 Sep 2009 05:57:38 GMT

On ProCurve Switches you have multiple options to prevent loops and therefore boradcast storm:

1. enable Spanning-Tree, therfore looped back STP packets should block the port

2. enable the feature "loop-protect" on en-user ports

3. configure the feature broadcast-limit which is acting on egress traffic

4. configure the feature rate-limit for broadcast traffic which is acting on ingress-traffic (but this is only available on 3500, 6200, 6600, 5400, 8200 switch series)

Re: How to prevent a broadcast storm

Pieter 't Hart — Fri, 18 Sep 2009 06:01:20 GMT

a broadcast is within a (v)lan (L2), so basically you should add vlan's, to limit the number of nodes in a network that can add to the broadcast-storm.

Re: How to prevent a broadcast storm

Yan Henrichon — Fri, 18 Sep 2009 11:53:12 GMT

Thank you for your answer guys.