Label Sharing for Fast PE Protection

Document Type Expired Internet-Draft (individual)
Authors Mingui Zhang  , Peng Zhou , Russ White 
Last updated 2014-12-19 (latest revision 2014-06-17)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a method to be used by VPN Service Providers to provide multi-homed CEs with fast protection of egress PEs. Egress PEs in a redundant group always share the same label in distribution of VPN routes of a VRF. A virtual Next Hop (vNH) in the IGP/MPLS backbone is created as the common end of LSP tunnels which would otherwise terminate at each egress PE. Primary and backup LSP tunnels ended at the vNH are set up by MPLS on basis of existing IGP FRR mechanisms. If the primary egress PE fails, the backup egress PE can recognize the "shared" VPN route label carried by the data packets. Therefore, the failure affected data packets can be smoothly rerouted to the backup PE for delivery without changing their VPN route label.


Mingui Zhang (
Peng Zhou (
Russ White (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)