How to check if 3750 switch support enhanced PAgP for VSS dual-active detection?

[gwhuang5398]

I have a 3750 stack switch I can connect to a 4500X VSS pair for dual-active detection. How can I check if the 3750 supports enhanced PAgP?

Thanks

[Jon Marshall]

Support was added for the 3750 with release 12.2(46)SE -

http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-software-releases-12-2-special-early-deployments/product_bulletin_c25-493554.html

Jon

[Reza Sharifi]

PAGP is supported if you are connecting a single switch (3750) to VSS, but if you are connecting a stack (2 3750s with one connection from each 3750 to VSS) only LACP is supported.

HTH