How To Check Broadcast Storm In Cisco Switch?
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1. Use the “show interface” command to check for high input and output errors on a specific port. If there are unusually high numbers for either of these, then it could be indicative of a broadcast storm.
2. You can also use the “show controllers” command to see if the port has excessive buffer drops. If this is the case, then this is a strong indication of a broadcast storm.
3. You can run the “show mac–address” command to see which MAC addresses are sending or receiving too many frames. This can be used to pinpoint the source of the broadcast storm.
4. If you are still not sure, you can use the “debug spanning–tree” command to see if any of the port states are transitioning between blocking/forwarding, this could also be caused by a broadcast storm.