The IESG has approved the Internet-Draft 'Graceful Restart Mechanism for LDP' <draft-ietf-mpls-ldp-restart-06.txt> as a Proposed Standard. This document is the product of the Multiprotocol Label Switching Working Group. The IESG contact persons are Scott Bradner and Bert Wijnen. Technical Summary This document describes a mechanism that helps minimize the negative effects on MPLS traffic caused by Label Switching Router's (LSR's) control plane restart, and specifically by the restart of its Label Distribution Protocol (LDP) component, on LSRs that are capable of preserving the MPLS forwarding component across the restart. The mechanism described in this document is applicable to all LSRs, both those with the ability to preserve forwarding state during LDP restart and those without (although the latter need to implement only a subset of the mechanism described in this document). Supporting (a subset of) the mechanism described here by the LSRs that can not preserve their MPLS forwarding state across the restart would not reduce the negative impact on MPLS traffic caused by their control plane restart, but it would minimize the impact if their neighbor(s) are capable of preserving the forwarding state across the restart of their control plane and implement the mechanism described here. Working Group Summary The mpls working group supported publication of this document. Protocol Quality This document was reviewed for the IESG by Scott Bradner.
