Full Mesh A/A Cluster with Cisco Stacked Switches (Stack/VSS/vPC)

Hi,

In an Active Active Cluster Full Mesh setup using Cisco Stacked switches and aggregate/LACP/etherchannel, should the port-channels on the Cisco side be different for each cluster unit aggregate port or should it be one port channel?

e.g if using Cisco 2960-X stack is it ...

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int port-channel 1

 description "primary FG01 aggregate port1 and 2 -- mapped to int Gig1/0/1 and Gig2/0/1"

!

int port-channel 2

 description "slave FG02 aggregate port1 and 2 -- mapped to int Gig1/0/2 and Gig2/0/2"

!

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or is it

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int port-channel 1

 description "primary & slave FG aggregate port1 and 2 -- mapped to int Gig1/0/1 , Gig1/0/2, Gig2/0/1 and Gig2/0/2"

!