draft-Zhangm-ccamp-reroute-00 Network Survivability Evaluation Metrics in Multi-domain Generalized MPLS Networks 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) IETF 79,BUPT,China,NOV 7-12,2010

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

Motivation ● Importance of network survivability ● Recovery Process: -traffic delay, -packet losses , -resource collision, preemption, -service discontinue, -can’t reach the level of reliability ● -phase 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 | Recovery Process: Motivation: -measure every phase recovery time -reduce the whole recovery time -optimize network IETF 79,BUPT,China,NOV 7-12,2010

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

Protocol Extension 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 IETF 79,BUPT,China,NOV 7-12,2010

Next Steps Any Comments? IETF 79,BUPT,China,NOV 7-12,2010