PC-S(P)C Requirements and Solution Status

1. PC-S(P)C Requirements and Solution Status CCAMP WG, IETF 72th Dublin

2. Authors/Contributors • Diego Caviglia (Ericsson) • Dino Bramanti (Ericsson) • Dan Li (Huawei) • Snigdho Bardalai (Fujitsu) • Shan Zhu (Fujitsu) • Igor Bryskin (ADVA) • Daniele Ceccarelli (Ericsson)

3. Requirementsdraft-ietf-ccamp-pc-and-sc-reqs-04.txt (LAST CALL) • Data Plane LSP Consistency • Stay in place during handover • Same path • Same resources • No Disruption of User Traffic • Transfer from MP to CP • Transfer from CP to MP (Optional) • Synchronization of state among nodes during conversion • Support of Soft Permanent Connections • Failure of Transfer • Traffic not affected • LSP status consistent

4. Solution ID • Solution adopted by the WG (draft-ietf-ccamp-pc-spc-rsvpte-ext-01); • New contributor has joined: • Daniele Ceccarelli (Ericsson) • New section about Node Graceful Restart has been added • A complete list of failure scenarios has been taken into account a illustrated.

5. IN EG LSR LSR LSR LER A C B LER Solution procedure Outline XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Resv Resv Resv Resv XC-migrated XC-migrated XC-migrated XC-migrated XC-migrated

6. Possible Failure Scenarios • MP to CP failure • Path Failure • Path Message and Data Plane Failure • Path Message and Communication Failure • Resv Error • Resv Error and Data Plane Failure • Resv Error and Communication Failure • Node Graceful Restart • CP to MP failure

7. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlinePath Failure – Data Plane Failure XC semi-migrated XC semi-migrated Failure XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_Err-PSR Path_Err-PSR XC rollbacked to NSM State Path_Err-PSR XC rollbacked to NSM State XC rollbacked to NSM State

8. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlinePath Failure – Communication Failure (Reliable Msg Delivery) XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) … Path_Err-PSR Path_Err-PSR XC rollbacked to NSM State XC rollbacked to NSM State

9. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlinePath Failure – Communication Failure (No Rel. Msg Delivery) XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) -TIMER EXP- Path_Tear (Admin Flag set) Path_Tear (Admin Flag set) XC rollbacked to NSM State XC rollbacked to NSM State

10. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlineResv Failure – Data Plane Failure XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) XC-migrated Resv Resv Path_Err-PSR ResvErr+Special Flag in ErrorSpec XC-migrated Path_Err-PSR ResvErr+Special Flag in ErrorSpec XC rollbacked to NSM State XC rollbacked to NSM State XC rollbacked to NSM State XC rollbacked to NSM State

11. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlineResv Failure – Communication Failure (Reliable Msg Delivery) XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) XC-migrated Resv Resv XC-migrated … Path_Err-PSR Path_Err-PSR Path_Err-PSR ResvErr+Special Flag in ErrorSpec XC rollbacked to NSM State XC rollbacked to NSM State XC rollbacked to NSM State XC rollbacked to NSM State

12. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlineResv Failure – Communication Failure (No Reliable Msg Delivery) XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) XC-migrated Resv Resv XC-migrated -TIMER EXP- Path_Tear (Admin Flag set) Path_Tear (Admin Flag set) Path_Tear (Admin Flag set) Path_Tear (Admin Flag set) XC rollbacked to NSM State XC rollbacked to NSM State XC rollbacked to NSM State XC rollbacked to NSM State

13. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlineNode Restart – Graceful Restart – Restart timer not infinite XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Resv Resv XC-migrated XC-migrated Path_Tear (AF set) - RESTART TIMER EXP- Path_Err (AF set) Path_Tear (AF set)

14. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlineNode Restart – Graceful Restart – Restart timer infinite XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Resv Resv XC-migrated XC-migrated Path_Tear (AF set) - RECOVERY TIMER EXP- Path_Err (AF set) Path_Tear (AF set)

15. IN EG LSR LSR LSR LER A C B LER Solution procedure OutlineNode Restart – Graceful Restart – Ingress LER not abort XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated XC semi-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Resv Resv XC-migrated XC-migrated Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_migration (Admin Flag set) Path_Err (AF set) Path_Err (AF set) Path_Err (AF set) Path_Tear (AF set)

16. QUESTIONS ? THANK YOU