CHAPTER 6
VLAN Translation with QoS
VLAN translation provides flexibility in managing VLANs and Metro Ethernet-related services.
Layer2 VPN services are required to be deployed in the following Ethernet service type constructs:
•
Ethernet Line (E-Line) in E-line remote services: Provides a point-to-point Ethernet Virtual Circuit
(EVC).
•
Ethernet LAN (ELAN) in E-line remote services: Provides a multipoint-to-multipoint EVC.
•
ELAN local
•
ELAN remote
All the remote services are transported over Ethernet Over Multi Protocol Label Switching (EoMPLS)
(point-to-point) or Virtual Private LAN Service VPLS (multipoint-to-multipoint) cloud. Each service can
accommodate the traffic coming from the customer either with 1 tag or 2 tags. The CoS from the customer
must be passed transparently through the service to the other CPEs (UNIs).
•
Benefits of VLAN Translation, page 71
•
Configuring 1:1 VLAN Translation, page 74
•
Configuring 2:1 VLAN Translation, page 75
•
Configuring policy for ingress QoS, page 76
•
Configuration Example for 1:1 VLAN Translation, page 77
•
Configuration Example for 2:1 VLAN Translation, page 78
•
Configuration Example for policing ingress QoS, page 78
•
Configuration Verifications for VLAN Translation with QoS, page 78
Benefits of VLAN Translation
Earlier, the router supported Rewrite Push and Pop operations to push and remove 1 or more 802.1Q tags
from the service frames only. The CoS transparency could not be achieved along with VLAN tag manipulation.
This problem is solved with the VLAN Translation feature. The current implementation of the feature allows
one or more 802.1Q tags to be replaced with other 802.1Q tags and thus the desired tag manipulation can be
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
71
To Next Page
Loading...
Need help?
General
