Ehterchannel Question

Unanswered Question
Oct 31st, 2007

What is the recommended mode for 2 cisco switches etherchannel ON or Desirable?

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Jon Marshall Wed, 10/31/2007 - 05:12

Hi

Have a look at these 2 documents which are Cisco Best Practice recommendations for CatOS and IOS switches. They include recommendations on etherchannel configuration amongst many other things.

CatOS

http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a0080094713.shtml

IOS

http://www.cisco.com/en/US/products/hw/switches/ps700/products_white_paper09186a00801b49a4.shtml

HTH

Jon

welcomeccie Wed, 10/31/2007 - 06:35

Hi,

Thank you very much for your reply But they didn't state if i should use ON or desirable mode for etherchannel .There is no recommendation for my question

Regards,

Jon Marshall Wed, 10/31/2007 - 06:42

Hi

Are you talking about layer 2 or layer 3 etherchannels ?

From CatOS doc

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Recommendation

Cisco recommends that PAgP be enabled on all switch-to-switch channel connections, avoiding on mode. The preferred method is to set desirable mode at both ends of a link. The additional recommendation is to leave the silent/non-silent keyword at default - silent on Catalyst 6500/6000 and 4500/4000 switches, non-silent on Catalyst 5500/5000 fiber ports.

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From IOS doc

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Cisco Configuration Recommendation for L2 Channels

Enable PAgP and use a setting of desirable-desirable on all EtherChannel links

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HTH

Jon

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