Transcript new-alon-segment-protection-for-p2p-vlan-connections-04-09.ppt

Segment Protection for
P2P VLAN connections
Zehavit Alon, Nurit Sprecher
IEEE Interim Meeting May 2009
Slide 1
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.
Slide 2
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-0109v02.ppt can be supported by this extension
Slide 3
Protection Switching
V1
p3
p1, p2
1 A2
3
•
•
•
•
Slide 4
p3
V1
p1, p2
1B 2
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
Slide 5
Thank You
[email protected]
[email protected]
Slide 6