Rewrite Configuration Model for 802.1ad Ports
The table describes the rewrite configuration supported on service instances for the C-UNI, S-UNI and NNI
ports
Egress Direction
Ingress Direction
Rewrite
Port
Bridge Domain
Not supported
Supported
Push
C-UNI
S-UNI
Not supported
Supported
Pop
NNI
Supported
Not supported
Push
Trunk EFP
Supported
Supported
Pop
C-UNI
NA
NA
NA
S-UNI
Not supported
Supported
Pop
NNI
Supported
Not supported
Push
Cross Connect
Not supported
Supported
Push
C-UNI
S-UNI
NA
NA
NA
NNI
Information About 802.1ad
802.1ad Ports
In 802.1ad, a port is configured as either a customer user-network interface (C-UNI), a service-provider UNI
(S-UNI), or a network-to-network interface (NNI). Only Layer 2 interfaces can be 802.1ad ports.
•
C-UNI
—
an be either an access port or an 802.1Q trunk port. The port uses the customer bridge addresses.
To configure a C-UNI port, enter the ethernet dot1ad uni c-port interface configuration command.
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
403
Configuring IEEE 802.1ad
Rewrite Configuration Model for 802.1ad Ports