CCIE R&S question

Unanswered Question
Feb 14th, 2007

What are the differences betwenn LACP and PAGP ? I know that LACP is a IEEE protocol but other than that they seem to be the same.

Can anybody please point me to a document that would help me to understand the differences ?

Thank you


I have this problem too.
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cristip Wed, 02/14/2007 - 16:43

Thank you I had read this when I posted the message.

Couldn't understand a some of the things explained there

LACP system priority- couldn't understand the way it is used

LACP port priority- this is OK I understand

LACP administrative key- this is not, I don't understand this

glen.grant Wed, 02/14/2007 - 14:52

They are the same , lacp is the IEEE standard and pagp is cisco proprietary etherchannel protocol . I believe the IEEE standard was even derived from the cisco's version . The only real differences are the syntaxes on the interfaces , the terminalogy is slightly different .

sundar.palaniappan Wed, 02/14/2007 - 16:25

The one big advantage LACP has over PAGP is the interoperability with the other vendor switches. PAGP, being Cisco Proprietary, cannot aggregate channels with other vendor switches.



cristip Wed, 02/14/2007 - 16:45

the priority mechanisms above mentioned do not exist in PAGP. So that may be an important differece but as I wrote above I do not undersatand the way it works.


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