RE: Layer 2 Etherchannel versus Layer 3 Etherchannel

From: Larry Letterman (lletterm@cisco.com)
Date: Tue Jul 22 2003 - 17:08:10 GMT-3


Binding 2 gig-e links together and using them as a /30
Layer 3 link between 2 data centers for storage backup
From one center to the other...

Larry Letterman
Cisco Systems

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
pierreg
Sent: Tuesday, July 22, 2003 1:08 PM
To: ccielab@groupstudy.com
Cc: byme88@yahoo.com
Subject: Layer 2 Etherchannel versus Layer 3 Etherchannel

What I understand:

With a Layer 2 Etherchannel you group layer 2 interfaces together. With
a Layer 3 Etherchannel you combine multiple Layer 2 interfaces as one,
then you assigned them an IP.

What I want to know?

I assume if they created this new technology it's because it must have
been needed. Can some one give me a (real life) example of the kind of
problems Layer 3 Etherchannel solve? If you don't have a real life
example, a hypothetical one is OK too.

Thanks,

Pierre-Alex



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