Re: Etherchannel - PAgP port priority

Are we talking about spanning-tree or PAgP?

port priority plays a role in Spanning Tree. In PAgP, the idea is
different. There's a PAgP port priority that is used to determine which
links will become active. You can have a bundle of up to 16 links, but
only 8 will be active.

That's different than the roles in spanning tree!

With etherchannel, the links used are determed by "port identifier"
which consists of the port priority and the interface number (NOT MAC
address).

HTH,

*Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,

JNCIE-M #153, JNCIS-ER, CISSP, et al.

JNCI-M, JNCI-ER

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Victor wrote:
>
> Hello!!!
>
> There is something very confusing for me on this subject. For port
> priorization in PAgP, I understand that the lowest mac address
> overrides the port priority in the priorization scheme to "elect" the
> controlling device, however I've seen in some documentation (also in
> the R&S audio bootcamp from Scott Morris, INE) a solution where the
> port priority manipulation is used. In this case, my question is: if
> the lowest mac address always win whatever the port priority be, how
> is this manipulation possible? Someone has a clue??
>
> Maybe Scott is around here and can clarify on this.
>
> Brgds.... Victor.

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Received on Thu Dec 10 2009 - 21:31:06 ART