port channelling on 3750 switch stacks

[martaylor]

I have a stack containing 4 x 3750-48 PoE switches and would like to channel these back to a 6509 over the GigE ports. To allow for resilience I would like to use a GigE port from different 3750 switches in the stack but cant find any commands or documentation on CCO as to how you do this.

Please can you let me know if this is configurable and where I can find this on CCO.

[glen.grant · Accepted solution]

Its called cross stack etherchannel and it can be done .If you want to use the dynamic channel protocols you must use LACP , not pagp. The switch must be at 12.2.25SEC also to use lacp. This might help .

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

[martaylor]

thank you for this. This is exactly what I need to do