RE: Trunks & etherchannel

From: Ebru Toker (EToker@tepum.com.tr)
Date: Sun Nov 10 2002 - 17:14:04 GMT-3


Normally STP blocks 3 of the trunks. But if you want to load balance for ex, vlan 2, vlan 3, vlan 4 and vlan 5 pass through trunk 2, trunk 3, trunk 4 and trunk 5 respectively, you should change the spanning tree costs for each vlan on each trunk.

spanning-tree vlan 2 cost 10
You can use this command to set the cost. Alternatively you can change the port-pri too.

Ebru

-----Original Message-----
From: Balaji Siva [mailto:bsivasub@cisco.com]
Sent: 10 Kas}m 2002 Pazar 21:14
To: Brian T. Albert; ccielab@groupstudy.com
Subject: RE: Trunks & etherchannel

only one link will be STP forwarding and others would be blocking. You need
etherchannel.

Balaji

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Brian T. Albert
Sent: Sunday, November 10, 2002 1:47 PM
To: ccielab@groupstudy.com
Subject: Trunks & etherchannel

Suppose we have a 3550 and a 5000 switch and we configure 4 trunk ports
between them. Will traffic be load balanced across the 4 trunks without
creating an etherchannel? Assume all 4 trunks carry the same VLANS. Are we
creating a loop without the Etherchannel?

Brian T. Albert
brian.albert@worldnet.att.net



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