1. 1 Dr. Abhay Karandikar A Jishnu, M Vinod Kumar Protection Switching for Point to Multipoint TESI

2. 2 Introduction Qay has P2P 1:1 protection mechanism –P2MP protection mechanism is pending This presentation describes protection switching requirements for P2MP

3. 3 PBB-TE Network Topology BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Link

4. 4 P2MP work TESI BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Link

5. 5 Concept PBB-TE MA enhanced with MD levels Switchover is performed first in the lowest MD level –If switchover fails within an MD level then switchover is performed in the next higher MD level –Switchover is locked-out in higher MD level using LockOutProtection (LoP)

6. 6 P2MP Protection: Segment 1 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Protect Link

7. 7 P2MP Protection: Segment 2 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Protect Link

8. 8 P2MP Protection: Segment 3 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Protect Link

9. 9 P2MP TESI Protection BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Protect Link

10. 10 HPD for Segment 1 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Link Protected Domain 1 => MD Level 1 Protected Domain 0 => MD Level 0

11. 11 HPD for Segment 2 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Link Protected Domain 1 => MD Level 1 Protected Domain 0 => MD Level 0

12. 12 HPD for Segment 3 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Link Protected Domain 1 => MD Level 1 Protected Domain 0 => MD Level 0

13. 13 HPD implementation BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Protect Link Protected Domain 1 => MD Level 1 Protected Domain 0 => MD Level 0 w w pp pp -MEP -MIP CCM

14. 14 Fault in MDL = 0 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Protect Link Protected Domain 1 => MD Level 1 Protected Domain 0 => MD Level 0 w w pp pp -MEP -MIP CCM LoP=1

15. 15 Switchover in MDL = 0 BEB1BEB2 BEB3 BCB1 BCB2 BCB3 Work Protect Link Protected Domain 1 => MD Level 1 Protected Domain 0 => MD Level 0 w w pp pp -MEP -MIP CCM

16. 16 Benefits Simple to understand, to implement and to provision Other TESIs will be less affected by the switchover Has less stringent requirement on the network resources Some path segments need not be protected Node protection can be handled –Node failure is similar to atleast two link failure Leads to unified framework for link protection within a single PBB-TE domain Leads to unified framework for protection across multiple PBB-TE domains