Redundancy is available through the PW redundancy feature: There can also be a Multiprotocol Label Switching (MPLS) pseudowire (PW) between two routers:Ī router can switch frames between two PWs in this case, this is a multi-segment PW: One router can do local switching between two of its interfaces: In reality, there can be multiple routers between the two end nodes, and there can be multiple designs to provide the point-to-point service. Point-to-point service basically emulates a transport circuit between two end nodes so the end nodes appear to be directly connected over a point-to-point link. The L2VPN feature provides the ability to provide point-to-point and multipoint services. See the Cisco ASR 9000 Series Aggregation Services Router L2VPN and Ethernet Services Configuration Guide, Release 4.3.x for additional information.ġ. It is useful to present basic examples in order to demonstrate design, services, features, and configuration. This document describes basic Layer 2 (L2) VPN (L2VPN) topologies.
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