From: Jonathan V Hays (jhays@jtan.com)
Date: Thu Aug 28 2003 - 11:21:50 GMT-3
Gary,
I don't think that making the switch root for a given VLAN has anything
to do with HSRP. You accomplish that task with "spanning-tree vlan
<number> root" or "spanning-tree vlan <number> priority". You can verify
results with the "show spanning-tree" command.
Read this section of the cat 3550 config guide for more info:
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12114ea1/3550s
cg/swstp.htm#1039614
For the second question you can set port cost on the non-root switch for
each VLAN. Lower cost is preferred. It is also possible to accomplish
this from the root switch using port-priority, if all costs are the same
on ports downstream. Details are in the same chapter of the config guide
cited above.
HTH
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Gary Bartlett
Sent: Thursday, August 28, 2003 5:12 AM
To: ccielab@groupstudy.com
Subject: Cat 3550 cross links
Hi guys,
I was looking over a lab that I'll be working on & came across a section
I'm not to familiar with.
The lab started off by having me configure the same vlan & interface
info on both cat3550s, interfaces Fa0/12, Fa0/13 and Fa0/14 into vlans
12, 13 & 14 respectively.
I also assigned the vlans with the following IP's 10.10.12.8/24 on cat1
.9 on cat2, 10.10.13.8/25 on cat1 .9 on cat 2, & 10.10.14.8/24 on cat1
.9 on cat2
I then configured HSRP between each of the vlans to be load balanced
my 2 issues are:
1) it requested that I make cat1 to be the root for vlans 12 & 13, &
cat2 to be the root for vlan 14 (not sure if what they would mean by
this is to simply give HSRP a higher priority of if it would be some
sort of CAT configuration they are asking for)
2) then they asked that i configure Cat1 & Cat2 cross links fa0/22,
Fa0/23 & Fa0/24 for load balancing such that Fa0/22 is preferred for
vlan 12, Fa0/23 is preferred for vlan 13, & Fa0/24 be preferred for vlan
24 (totally lost on this one...)
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