VSS dual-active (Port-Channel Pagp)

[Oscar Cardiel]

Anyone knows if is possible to configure multichassis port-channel between a VSS and 3750X (Port-channel not in the same switch on the 3750X stack). I got it using LACP but I need Pagp to get VSL redundancy “dual-active detection pagp trust channel-group 1”. I am using the last VSS IOS version 15.0(1)SY.

I can’t get the option “switch 1 preempt”, anyone knows if has it changed with other option?

Thank you very much, guys, for your help!

[Reza Sharifi]

Oscar,

Unfortunately, PAgP cannot be enabled on cross-stack EtherChannels.  To remedy this problem, use a 1Gig copper port between the 2 VSS switches and utilize the "fast hello" feature instead.

HTH

[Oscar Cardiel]

Hi Reza,

thanks for your answer. I got this:

You can configure trust mode on a port channel even if there are no interfaces on the port channel or the port channel is a protocol type other than PAgP. The trust mode status is displayed in the show pagp dual-active command output, but no interfaces are displayed.