1. LOGO Network Survivability Evaluation Metrics in Multi-domain Generalized MPLS Networks IETF 79,BUPT,China,NOV 7-12,2010 draft-Zhangm-ccamp-reroute-00 Min Zhang mzhang@bupt.edu.cn Lifang Zhang capricorn7111@hotmail.com Yuefeng Ji jyf@bupt.edu.cn Hongxiang Wang wanghx@bupt.edu.cn (Beijing University of Posts and Telecommunications) Yu Wang wangyu@mail.mitt.com.cn (China Academy of Telecommunication Research of MIIT)

2. Contents 1 Methodologies 2 Protocol Extension 3 Next Steps 4 Motivation IETF 79,BUPT,China,NOV 7-12,2010

3. Motivation -p hase 1: fault detection -phase 2: fault localization and isolation. -phase 3: fault notification. -phase 4: recovery. -phase 5: reversion. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- | Fault management | Backup path | Recovery | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- | TDET TLOC TNOT | TBR TBS TBA TSW TCR | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- IETF 79,BUPT,China,NOV 7-12,2010 Recovery Process: Motivation: ● ● -measure every phase recovery time -reduce the whole recovery time -optimize network Importance of network survivability -traffic delay, -packet losses, -resource collision, preemption, -service discontinue, -can’t reach the level of reliability

4. Methodologies Txt Text IETF 79,BUPT,China,NOV 7-12,2010 Single Domain Scenario: Multi-domain Scenario: 1 2 3 4 5 1. ChannelStatus ChannelStatusAck 3. ChannelStatus T2-T1 PathErr T4-T3 T6-T5 Service Sum=++ Fault localization delay isT2-T1 Notification delay is T4-T3 Recovery time is T6-T5 Domain 1 Domain 2 Domain 3

5. Protocol Extension necessity Assumption clock synchronization LMP (ChannelStatus Message ) FAULT_TIMESTAMP Object record the time of signaling sent and received RSVP(PathErr) SEND_ERR_TIMESTAMP Object RECEIVE_ERR_TIMESTAMP Object record the time of notification signal sent and received Protocol Extension IETF 79,BUPT,China,NOV 7-12,2010

6. LOGO IETF 79,BUPT,China,NOV 7-12,2010 Any Comments?