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CoS on Ethernet Pseudowires in Universal Edge Networks Overview

You can apply rewrite rules and classifiers to an Ethernet pseudowire on MIC and MPC interfaces on MX Series routers. In an edge network, the pseudowire can represent a single customer.

To create the pseudowires, you use logical tunnel (LT) interfaces that connect two virtual routing forwarding (VRF) instances. To provide CoS to the LT interface, you can apply classifiers and rewrite rules. Rewrite rules enable you to rewrite packet header information by specifying various CoS values, including DiffServ code point (DSCP) and IP precedence.

Note:

Scheduling is not supported on LT interfaces in the current release.

For example, a VPLS instance is connected to a Layer 3 routing instance. The logical tunnel labeled lt-9/0/0.0 is configured with vpls as the family, and lt-9/0/0.1 is configured with inet as the family. You can apply a rewrite rule and classifier for DSCP to lt-9/0/0.1, which can represent a business subscriber.

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