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How do I enable auto QOS between two 4500 series Cisco switches?

By rcorona ·
How do I enable auto QOS between two 4500 series Cisco switches connected via fiber trunk link? Each switch has an AVAYA IP gateway plugged into it. We would like the voIP traffic flowing between the gateways to have precedence over all other traffic that traverses that link. There are no IP phones plugged into either switch, just gateway to gateway traffic. Thanks!

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mls qos is your friend

by career In reply to How do I enable auto QOS ...

I'm not sure about the 4500, but on the 6500 you'd want the following:

In Global mode on each swich:

#mls qos

On Ports connect to the Cisco switches:

#mls qos trust cos

On Ports connect to the Avayas:

#mls qos cos 5

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