From: Thameem Maranveetil Parambath (tparamba@thecontactcentre.ae)
Date: Sat Mar 21 2009 - 05:47:02 ART
Negotiation of trunking and etherchannel is totally isolated one,
according to my understanding..
if u have two 3550.. it will form trunk by negotiation..
if u want to make etherchannel for this interfaces , you have to either
make them
a) negotiate with pagp
b) negotiate with lacp
or
c) manually enable etherchannel on both ends!
is that what you are looking for?
REgards,
Khurram Noor <engr.khurramnoor@googlemail.com>
Sent by: nobody@groupstudy.com
21/03/2009 11:29 AM
Please respond to
Khurram Noor <engr.khurramnoor@googlemail.com>
To
Cisco certification <ccielab@groupstudy.com>
cc
Subject
Negotiation over Trunk links
Hello everyone!
A question is keeps teasing me everytime when i configure trunks. As we
all
know all 3550 can negotiate trunks by default so if i have to configure
etherchannel over two to three links between two (3550-3550 or 3550-3560)
switches and there is a requirement that the switches should negotiate
etherchannel using either PagP or LacP, what should be the best practice?
1. Should i hard code switchports the mode of trunk and then perform
etherchannel negotiations between them.
2. Or both trunking and etherchannel can be negotiated one after
another.
I tried to do both negotiations together in my home lab and found strange
behaviour or etherchannel. sometimes it gets negotiated correctly and
sometimes it doesn't.
**
*Khurram Noor*
*CCIP,CCNA*
Blogs and organic groups at http://www.ccie.net
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