1. Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 1 79th IETF - BeiJing Signaling Extension for MPLS Ring Yong Huang (huang.yong@huawei.com)huang.yong@huawei.com Yuanlong Jiang (yljiang@huawei.com)yljiang@huawei.com draft-huang-mpls-ring-signaling-extension-01.txt

2. 2 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Problem Statement  Two point provision of LSP is required including the LSP running across MPLS ring (s) Without auto-provision mechanism, 4 point (even more as hop by hop) configuration is needed for a LSP to cross one ring not counting on the protection provision work. So, large amount of such LSP will cause large amount of configuration work.  Configuration work for Protecting (link & node) the service on MPLS ring also calls for automatic method.

3. 3 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Solution  Not using SPME label at working direction Avoiding hop by hop configuration and replaced by normal signaling.  Provision one closed LSP at protection direction  Link failure can be protected by pushing protection label on the packet and wrapping around, no need for signaling extension  Node failure can be protected the same manner as link, with a little signaling extension to keep label continuity  All Dynamic !

4. 4 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Solution 6 5 4 3 2 1 S D RING LSP Protect LSP ring label(35) label(20) label(99) label(52) label(100) label(111) Source S Destination D Label mapping Service LSP Physical link Protect lsp ring

5. 5 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Solution- node failure protection example 100 p2 100 p1 100 p3 6 5 4 3 2 1 S D RING LSP Protect LSP ring label(35) label(20) label(99) label(52) label(100) label(111) 源节点 S 宿节点 D 20 Support by signaling-ex

6. 6 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Solution 6 5 4 3 2 1 S D RING LSP Protect lsp ring label(35) label(20) label(98) 98/20 20/35 label(52) label(100) label(110) 100/98 110/100 52/110 Source S Destination D Label mapping Service LSP Physical link Protect lsp ring Signaling extension

7. 7 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Solution – LDP extension 0Notification (0x0001)Msg length 01234567890123456789012345678901 Message id status TLV Label mapping TLV Label mappinginfo 0x?length 01234567890123456789012345678901 00 in label egress ring/backup id Out label IMT resv Ingress ring/backup id EMT IMT ： Ingress Mapping type EMT ： Egress Mapping Type Ingress ring/backup id: ring id or backup id of the ingress port Inlabel: value of in label Egress ring/backup id : ring id or backup id of the egress port Outlabel: value of out label

8. 8 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Benefits  Dynamically provision LSP service on MPLS ring considering multi-service deployed on one single metro, thousands of service LSPs will be deployed and frequent service adjustment for mobile backhauling make static solution worse.  Little pre-provision work  Dynamically achieve link and node protection

9. 9 Copyright © 2004 Juniper Networks, Inc. Proprietary and Confidentialwww.juniper.net 79th IETF - BeiJing Next Steps  Output a revised new version based on comments and questions received