A Transparent Port UNI port is normally configured as a Layer 2 trusted port. The T-UNI port honors incoming customer 802.1p bits and derives an internal QoS level. The 802.1p bit marking of the Backbone VLAN (B-VLAN) is derived from the internal QoS level. If the T-UNI port is set as a Layer 2 untrusted port, a best-effort queue is assigned. Customer packet headers are not modified.
The T-UNI port QoS configurations are:
DiffServ = disable
Layer3Trusted = access (for EDM configuration)
access-diffserv enable (for CLI configuration)
You cannot configure access-diffserv and enable diffserv on a T-UNI port.
When a port is associated with a T-UNI I-SID, the T-UNI QoS configuration automatically takes effect.
When the port is removed from the T-UNI I-SID, the default port QoS configuration takes effect.
When an MLT, static or LACP, is added to a T-UNI I-SID, the T-UNI QoS configuration take effect on all the ports of the MLT.
When an MLT, static or LACP, is removed from a T-UNI I-SID, the port default QoS configuration is configured on all the member ports of the MLT.
If a port is added dynamically to a T-UNI MLT, static or LACP, the port inherits the QoS properties of the T-UNI MLT ports.
If a port is dynamically removed from a T-UNI MLT, static or LACP, the port retains the QoS configuration inherited from the MLT.