Configuring MPLS Layer 2 VPNs
Gigabit EtherChannel for Virtual Private Wire Service
17
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
Gigabit EtherChannel for Virtual Private Wire Service
GEC for AToM is a solution for a VPWS transporting Layer 2 packets over an MPLS backbone with
GEC.
This feature enables service providers t
o supply connectivity between customer sites having data link
layer (Layer 2) networks, by using a single, integrated, packet-based network infrastructure—a Cisco
MPLS network. Instead of separate networks with separate network management environments, service
providers can deliver Layer 2 connections over an MPLS backbone.
Supported Modes
The following modes are supported in the GEC for VPWS feature:
• GEC Like-to-Like Mode, page 17
• Any-to-GEC Mode, page 18
GEC Like-to-Like Mode
The GEC Like-to-Like mode allows switching of data between two physical interfaces in which the two
segments (CE1-PE1 and CE2-PE2, as shown in Figure 3) are both of GEC type.
The GEC Like-to-Like mode has the following features:
• EtherChannel-to-EtherChannel over MPLS (Bridged) Interworking, page 19
• EtherChannel-to-EtherChannel over MPLS (Routed) Interworking, page 21
Figure 3 Topology of the GEC Like-to-Like Mode for the GEC for VPWS Feature
MPLS
Xconnect
Customer
Site
Customer
Site
GEC-CE1 GEC-CE2
GEC-PE1
ASR1K
GEC-PE2
ASR1K
332075
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