...
switchport trunk allowed vlan add 10
Для ingress:
switchport dot1q ethertype ingress stag add 9100
Для egress:
switchport dot1q ethertype egress stag 9100
...
...
switchport trunk allowed vlan add 10
Для ingress:
switchport dot1q ethertype ingress stag add 9100
Для egress:
switchport dot1q ethertype egress stag 9100
...