Etherchannel between stack switches[3750] and standalone switch[3560]

[ramanai.raj]

Hi,

I have 2*3750 switches in stack as core and 1*3560 switch in access layer. I want to enable ether channel between stack switch[3750A & 3750B] and 3560 switches.

Have connected  2 links from 3560 switch to stack switch, one link to 3750A and other link to 3750B. Will it work in this way as per my requirement? 

or i should enabled stacking on 3560 switch too and configure cross-stack ether channel between 3750 stack and 3560 stack. i refered few cisco documents, but the cross stack etherchannel configuration example has 3750 at both end stacks.

Rgds...

VikramS

[Jose Solano]

Hi,

 This should work fine as per you set up, the 3750 stack will be acting as one switch, which means that the ether-channel configuration should be straight forward. There is no need to stack the 3560 for this to work, also the 3560 are not stackable.

Hope this helps.

[glen.grant]

     You can use crosstack etherchannel on your stacked 3750's , you must use LACP as the channel aggregation method.

There is no way to stack a 3560 .