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Full Reroute Reversion Combined Recovery

This document outlines the proposed strategies for reversion and combined recovery in network management, emphasizing the importance of maintaining high availability at all times. It details the fundamental principles of reverting to an original path and supporting rerouting with extra traffic. The proposals involve assessing existing recovery services, examining the need for additional extensions, and documenting processes in the BCP. The goal is to ensure uninterrupted service, enhance network reliability during maintenance, and support complex scenarios such as temporary reroutes while preserving essential protections.

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Full Reroute Reversion Combined Recovery

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  1. Full Reroute ReversionCombined Recovery Draft-roch-ccamp-full-reroute-reversion-01.txt Draft-roch-ccamp-combined-recovery-reqts-01.txt Co-authors: E. Roch, L. Ong, A. Malis March 26, 2012

  2. Reversion • Reversion – return to original path • 4873 provides explicit text on how this is supported for 1+1 and 1:n protection and rerouting with extra traffic • These generally involve preplanning or prereservation of a disjoint backup path • Carriers are interested in reversion with full reroute as well, where • No preplanning or prereservation is done • The backup path may share resources with the original path

  3. Proposal • Review requirements for supporting this service • Subset of existing recovery services • See if any extensions are needed • Hopefully not, ideally supported with existing specs • Document in BCP if no extensions needed

  4. Combined Recovery • Preservation of high availability at all times is highly valued functionality • Combinations of restoration and protection may be involved in • Preserving 1+1 protection under planned events such as maintenance • Temporary reroute (with reversion) of affected path • Supporting higher availability beyond 1+1 • Restoration of one or both paths in case of failure

  5. Proposed Actions • Review requirements • combinations of existing recovery capabilities • Evaluate if any additional extensions are necessary • Document as needed

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