re: LACP port priority

remember that lacp port priority has an effect only on the switch with best (lowest) lacp system-prioriry
it is not related with active/passive mode, but with system-priority (you can find which switch is lacp master using "show lacp"; will be lowest MAC@ if both switches use the default priority)

The port-priority doesn't have an effect on the hashing, it is just used to control which ports have the best chances to be used into a port-channel (if not set, the lowest port-id will be preferred).
the best example I could find is when you have more than 8 ports bundled on a 3750 : only the 8 ports with lowest port priority will be used to forward traffic.

> Message du 26/11/12 C 23h44
> De : "Tauseef Khan"
> A : "Cisco certification"
> Copie C :
> Objet : LACP port priority
>
> If i have etherchannel using lacp active at sw1 interfaces 1-3 and passive
> at sw2 at Interfaces1-3 and want to control the lacp port priority say on
> interface 1. Do i need to configure lacp port-priority under int fa0/1 of
> both sw1 and 2 or just on the one which initiated the link ie sw1 in this
> example.
>
> While I am here, the default lacp port priority is 32768 and the options
> are between 0-65535. I am right in saying that if i have a lacp
> port-priority 0 on an interface it will not be chosen for traffic
> regards
>
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Received on Tue Nov 27 2012 - 06:48:50 ART