I am using ports 2 and 3. The defaults.
show virtual-chassis vc-port all-members
root> show virtual-chassis vc-port all-members
fpc0:
--------------------------------------------------------------------------
Interface Type Trunk Status Speed Neighbor
or ID (mbps) ID Interface
PIC / Port
1/2 Configured 5 Up 40000 1 vcp-255/1/2
1/3 Configured 5 Up 40000 1 vcp-255/1/3
fpc1:
--------------------------------------------------------------------------
Interface Type Trunk Status Speed Neighbor
or ID (mbps) ID Interface
PIC / Port
1/2 Configured 5 Up 40000 0 vcp-255/1/2
1/3 Configured 5 Up 40000 0 vcp-255/1/3
{master:0}