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Home > Forums > Communications Rack > Networking > Cisco: Switches Forum

Etherchannel problem

Read More Threads Like This One

clark72 (TechnicalUser)

12 Jun 12 5:05

Hello to everyone,

I have a problem with an etherchannel between a cisco 2950 and a couple of catalyst 4506.
The cisco 2950 is connect via an etherchannel to the catalyst 4506A. The channel consist of two port on both side and is in trunk mode, encapsulation dot1q.
Now i have the necessity to connect the 2950 to the other catalyst, 4506B.
So, i copy the same configuration on the 4506B, but when I unplug the two rj45 cables from the catalyst 4506A to plug them in the 4506B the etherchannel doesn't go up in any way.
Sorry i'm becoming crazy.
Have you some idea?
Thank's.

VinceWhirlwind (TechnicalUser)

13 Jun 12 22:20

You need to use a different port-channel number for the new channel-group on the 2950?

FisherPricePhone (TechnicalUser)

23 Jun 12 16:25

Have you got them set to mode on, PAGP auto/desirable or LACP active/passive? Trunks on all ports is correct and also using channel-group command to tie the ports into the same port-channel number. Hope this helps.

It's all just paper cups and bits of string!!!!!!!!!

CCNA, CCDA, ACIS - Implement IP Office, ACSS - Implement IP Office, Convergence + etc...

RosedaleITGuy (IS/IT--Management)

25 Jul 12 10:33

This sounds like it might be as simple as using a crossover cable vs. straight through.

VinceWhirlwind (TechnicalUser)

25 Jul 12 21:29

Good point, the description of the problem might be wrong - did the OP mean to say "The etherchannel doesn't go up", or did he mean to say "I get no physical link".

allworxguy (Vendor)

1 Aug 12 8:56

And did you "no shut" the ether-channel?

Marv
www.telemarv.ca

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