Symptom

SGT inline tagging is claimed as supported. However, SGT inline tagging over portchannel uplink has not been tested and is not supported but this is not publicly documented EX: For setup: c9800====POx====switch SGT inline tagging can be configured on uplink ports but not supported due to testing gap

Conditions

SGT inline tagging; 9800 uplink configured with port channel

Workaround

Configure cts manual both on the physical ports that form the etherchannel and portchannel interface. C9800: interface TenGigabitEthernet0/0/0 switchport trunk allowed vlan 65,75 switchport mode trunk no negotiation auto cts manual policy static sgt 50 trusted channel-protocol lacp channel-group 4 mode active interface TenGigabitEthernet0/0/2 switchport trunk allowed vlan 65,75 switchport mode trunk no negotiation auto cts manual policy static sgt 50 trusted channel-protocol lacp channel-group 4 mode active interface Port-channel4 switchport trunk allowed vlan 65,75 switchport mode trunk cts manual policy static sgt 50 trusted

Further Problem Description