From: David Prall (dcp@dcptech.com)
Date: Tue Dec 11 2007 - 12:54:29 ART
Have a look at the campus design SRND. It discusses L3 access and how you
can get polarized on routing and etherchannel. So you have to flip-flop the
settings.
-- http://dcp.dcptech.com> -----Original Message----- > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On > Behalf Of Frank CCIE > Sent: Tuesday, December 11, 2007 10:41 AM > To: Cisco certification; Cisco certification > Subject: How to configure etherchannel load-balance in the > middle switch > > 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 > > ______________________________________________________________ > _________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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