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Community Member

SWITCH FLOODING TRAFFIC

I have a large network with vlan, dtp, trunk, etc. Sniffing traffic on some switch, i found unicast traffic flooded on all ports. I know how catalyst switch work, and there was 2 situation on which this happen

1)Mac address table full

2)Mac address of destination not in list

Ok. But i would like to know if there is a method to avoid this situations.

Can you give me some link that point out this kind of problems?

Thnak you.

1 REPLY
Cisco Employee

Re: SWITCH FLOODING TRAFFIC

Hi,

a good resource for troubleshooting unicast flooding is "Unicast Flooding in Switched Campus Networks"

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801d0808.shtml

This addresses the most dominant reasons, in case your issue is different, please provide further informations.

Hope this helps! Please rate all posts.

Regards, Martin

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