...
switchport dot1q ethertype ingress /stag add 9100
switchport dot1q ethertype egress stag 9100
exit
!
interface TenGigabitEthernet 1/0/24
...
...
switchport dot1q ethertype ingress /stag add 9100
switchport dot1q ethertype egress stag 9100
exit
!
interface TenGigabitEthernet 1/0/24
...