port channel help

Unanswered Question
Nov 20th, 2008
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guys can someone please clear few doubts regarding MST.....we have two 3560's swicthes there is 200M etherchannel as well.....now we have 10 vlans so all togather three instances )0,1 and 2

5 vlans are in mst1 and 5 vlans are in mst 2......i have a questions etherchannel is a logical bundle and Spanning tree looks at it as a single link right?? now managment has asked us to divide the vlans one port should run even vlans and other port should run odd vlans.....i mean is it possible as i thought that both instances travel togather on that channel port......i mean guys to be honest i am confused....can someone please help me

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Istvan_Rabai Thu, 11/20/2008 - 21:01
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I think the simplest way to do this is to remove the Ether-channel configuration completely and prune the unneeded vlans from the trunks on both sides of the links:

interface fa0/1

switchport trunk allowed vlan 1,3,5,7,9

interface fa0/2

switchport trunk allowed vlan 2,4,6,8,10



The_guroo_2 Sat, 11/22/2008 - 05:00
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ok what if i have four switches can we do the ablove mentioned excersie..

Istvan_Rabai Sat, 11/22/2008 - 05:20
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I suggest you to do it out of working hours, so the users are not affected by the change during their operation.




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