Etherchannel config

[lcaruso]

Hi,

I'm doing an etherchannel (layer 2) config for the first time. I have three 2960S switches configured in a stack and a 3750-X. I've been instructed to take one port -from each 2960S and connect to the 3750-X for the etherchannel.

Since I've not done this previously, I'm hoping someone would kindly share the correct commands and/or any tips to get this done.

Thanks in advance for any assistance rendered.

[Reza Sharifi · Accepted solution]

Hi,

Here is the config guide for the 3750 series on how to configure Etherchannel step by step

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_25_see/configuration/guide/swethchl.html

HTH

Reza

[lcaruso]

thanks for the link!

[Sebastian Fernandez · Accepted solution]

In continuation to what others have said, please make sure about the below limitation. PaGP cannot be used when configuring cross stack etherchannel as I am sure you will use cross stack for redundacy.

Configuration Guidelines

Follow the guidelines specific to the cross-stack EtherChannel:

• For cross-stack EtherChannel configurations, ensure that all ports  targeted for the EtherChannel are either configured for LACP or are  manually configured to be in the channel group. Use the channel-group channel-group-number mode on interface configuration command in order to manually configure ports to  be in the channel group. The PAgP protocol is not supported on  cross-stack EtherChannels.

From URL:

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_example09186a00806cb982.shtml

Please rate this post if you find it useful.

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Rgds,

Sebastian

[lcaruso]

absolutely will use cross-stack etherchannel...thanks for the great tip

[JOEL A. SMITH]

Hi guys,

question here is, is there a way to configure Etherchannel between a L2 and a L3 device? I am being told it is possible but I am not able to find any config to support that claim. Anyone seen or heard of such claims?

[Sebastian Fernandez]

Joel,

It is indeed simple, configure simple etherchannel like you do with L2 end port-channel interface configured as access port and other side port-channel interface with IP address.

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Sebastian

[JOEL A. SMITH]

Thank you for the feed back. I was able to get the Etherchannel up and working. I appreciate your support.