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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
Chapter 16 Configuring MPLS Layer 2 VPNs
Gigabit EtherChannel for Virtual Private Wire Service
Any-to-GEC Mode
The Any-to-GEC mode allows switching of data between two physical interfaces in which the two
segments, CE1-PE1 and CE2-PE2, are both of different types, while one is GEC, the other can be PPP,
Ethernet, Frame Relay, or ATM, as shown in Figure 16-6.
The Any-to-GEC mode has the following features:
• Any-to-EtherChannel over MPLS (Bridged) Interworking, page 16-33
• Any-to-EtherChannel over MPLS (Routed) Interworking, page 16-35
Figure 16-6 Topology of the Any-to-GEC Mode for the GEC for VPWS Feature
Note Bridged interworking is used when Layer 2 (L2) packets are considered without regard for Layer 3
contents. In bridged interworking, Ethernet frames that are extracted from the attachment circuit are sent
over the MPLS pseudowire.
Note Routed interworking is used to carry Layer 3 packets. In routed interworking, IP packets that are
extracted from the attachment circuits are sent over the MPLS pseudowire.
Restrictions for Gigabit EtherChannel for Virtual Private Wire Service
The following are the restrictions for Gigabit EtherChannel for VPWS are the followings:
• GEC for VPWS does not support Q-in-Q encapsulation and remote port shutdown.
• A maximum four member links are supported under the port channel and a maximum of 64 port
channel bundles are supported per router.
MPLS
Xconnect
Customer
Site
Customer
Site
CE1
(FR or ATM)
GEC-CE2
PE1
(FR or ATM)
ASR1K
GEC-PE2
ASR1K
332074