Etherchannels Cisco Catalyst 3750

Unanswered Question
Jun 30th, 2007

I cannot get etherchannels to operate correctly.


My setup is as follow:

3750------------->2950

------------->

The dotted lines are 2 wireless links between 2 locations 7 KM apart. The links are all on the same VLAN. The problem is whenever I enable the etherchannels, they pull down my entire network. I get high latency and dropped packets on all my links.I need the etherchannels to work in order to automate the process if one link fails. Any suggestions would be appreciated.

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mohammedmahmoud Sat, 06/30/2007 - 02:39

Hi,


Can you please post the configurations of both switches, can you describe the wireless topology and equipments in more details.


BR,

Mohammed Mahmoud.

griffijo@elizab... Sat, 06/30/2007 - 12:47

Is it possible for you to do layer out to the 2950 instead of layer 2? You'll get better load balancing, convergence, etc.

glen.grant Sat, 06/30/2007 - 19:01

The switches on both sides should be the same.If they are strictly etherchannelsthen just use the following , this assuming a single 3750 and not a stack. Also hardcode all ports to 100/full , all ports must have the same operating parameters and the 3750 is 10/100/1000 and the the 2950 is just 10/100.


On the interfaces just use


channel-group 1 mode desirable non-silent

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