From: Frank CCIE (frankccie@gmail.com)
Date: Tue Dec 11 2007 - 12:40:50 ART
Hi, Experts,
Assume there are 3 catalyst switches 3550 connected to each other in
triangle with Etherchannels. Cat1 is the root of spanning tree.
A workstation is linked to Cat3. The major user traffic is between the
workstation in Cat3 and the users in a Vlan in Cat2. In this
topology, the traffic goes from Cat3 ->Cat1 -> Cat2 and back from Cat2
-> Cat1 -> Cat3, because Cat1 is the root of the spanning tree.
Cat1
/ \
/ \
Cat2 --- Cat3
In Cat 3 :
port-channel load-balance dst-mac
In Cat 2:
Port-channel load-balance src-mac
My question is:
- How to configure etherchannel load-balance in the middle switch
Cat1, which is in the middle of traffic path?
- Should I change the Root switch to either Cat2 or Cat 3, to make the
traffic travels between Cat2 and Cat3 without passing Cat1 ? It will
use the etherchannel bandwidth more efficient.
Thanks in advance
Frank
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