Vlan Translation With Qos; Benefits Of Vlan Translation; Carrier Ethernet Configuration Guide (Cisco Asr 920 Series - Cisco ASR 920 Series Configuration Manual Ethernet Router

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
• 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).
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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
(EVC).
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
C H A P T E R

Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)

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