The interface's taggin mode. The interface can be set as : network(1) - This is the normal network mode. It can take untagged and 802.3ac tagged frames. In this mode, 802.1q can be enabled on the interface. Frames with an ethertype of 0x8100 is considered as tagged. provider(2) - In provider mode, frames are considered provider tagged if it matches the 'ionIfProviderEtherType'. Frames which are ingress with a provider tag, are stripped of their provider tag on egressing this interface. If the frame's ethertype doesnt match the 'ionIfProviderEtherType' it is as untagged. customer(3) - The customer mode is a normal access port which is not 802.1Q aware.