A New Internet-Draft is available from the on-line Internet-Drafts
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This draft is a work item of the Multiprotocol Label Switching Working Group of the IETF.
Title : LDP IGP Synchronization
Author(s) : M. Jork, A. Atlas, L. Fang
Filename : draft-ietf-mpls-ldp-igp-sync-01.txt
Pages : 8
Date : 2008-3-24
In certain networks there is a dependency on edge-to-edge LSPs setup
by LDP, e.g. networks that are used for MPLS VPN applications. For
such applications it is not possible to rely on IP forwarding if the
MPLS LSP is not operating appropriately. Blackholing of labeled
traffic can occur in situations where the IGP is operational on a
link but LDP is not operational on that link. While the link could
still be used for IP forwarding, it is not useful for traffic with
packets carrying a label stack of more than one label or when the IP
address carried in the packet is out of the RFC1918 space. This
document describes a mechanism to avoid traffic loss due to this
condition without introducing any protocol changes.
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