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Chapter 21
Configuring L2VPN Interworking
Ethernet/VLAN to Frame Relay Interworking
The Ethernet VLAN to Frame Relay (FR) Interworking feature is described in the following topics:
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Prerequisites of Ethernet/VLAN to Frame Relay Interworking
Before you configure Ethernet/VLAN to Frame Relay Interworking on a network, you must enable Cisco
Express Forwarding.
Restrictions for Ethernet/VLAN to Frame Relay Interworking
In Cisco IOS Release 12.2(33)SB, the Ethernet/VLAN to Frame Relay LS has the following restrictions:
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OL-2226-23
Prerequisites of Ethernet/VLAN to Frame Relay Interworking, page 21-17
Restrictions for Ethernet/VLAN to Frame Relay Interworking, page 21-17
FR DLCI to Ethernet Local Switching—Bridged Interworking, page 21-19
FR DLCI to VLAN 802.1Q Local Switching—Bridged Interworking, page 21-20
FR DLCI to Ethernet Port AToM—Bridged Interworking, page 21-20
FR DLCI to Ethernet VLAN 802.1Q AToM—Bridged Interworking, page 21-21
Frame Relay to Ethernet—Routed Interworking, page 21-22
Configuration Tasks and Examples, page 21-23
The following translations are only supported and other translations are dropped:
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Ethernet without LAN FCS (0300800080C20007 or 6558)
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Spanning tree (0300800080C2000E or 4242)
The PVC status signaling works the same way as in the like-to-like case. The PE router reports the
PVC status to the CE router based on the availability of the other CE router.
Only FR DLCI mode is supported. FR port mode is not supported.
If the Ethernet frame includes a 802.1Q header (VLAN header), due to the type of endpoint
attachment (Ethernet port mode), the VLAN header stays in the frame and it is forwarded to the
FR CE
(Figure
21-10).
Ethernet/VLAN to Frame Relay Interworking
Cisco 10000 Series Router Software Configuration Guide
21-17
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Troubleshooting
