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Segment Protection for P2P VLAN connections. Zehavit Alon, Nurit Sprecher IEEE Interim Meeting May 2009. Current Segment Protection Proposed scope and solution. The current Segment Protection proposal includes TESIs only:
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Segment Protection for P2P VLAN connections Zehavit Alon, Nurit Sprecher IEEE Interim Meeting May 2009
Current Segment Protection Proposed scope and solution • The current Segment Protection proposal includes TESIs only: • “Protect a segment, where a segment is a sequence of links and intervening bridges traversed by a group of Traffic engineered Shared Forwarding Paths”. • The proposed mechanism for protection switching is FDB outbound port modification when a segment fault is detected. • A segment fault is detected by a dedicated MA created for each segment with MEPs on the segment edges.
Proposed enhancement • The same mechanism can be employed for P2P VLAN connections. • In P2P VLAN connection, the member set of the VLAN include only 2 ports, and there is no need for learning on these VLANs. (traffic is flooded to the only available port) • The health of the P2P VLAN segment is monitored by defining an MA for the protected VLAN on the segment. • Protection switching is done by changing the port in the VLAN member set of the affected point to point protected VLANs when a segment fault is detected. • Note: The proposed mechanism is similar to G.8031 • Note: The scenarios covered by new-sultan-segment-protection-technical-proposal-0109-v02.ppt can be supported by this extension
Protection Switching p3 p3 p2 p2 B A 1 2 1 2 3 3 • V1 is a point to point service. • VLAN V1 is defined only on 2 ports on each bridge. • A segment fails • The member set of V1 on bridges A and B is modified
Recommendation • Add protection for P2P VLAN connection to the proposed PAR
Thank You zehavit.alon@nsn.com nurit.sprecher@nsn.com