Transcript ccamp-18
GMPLS Deployment in Existing IP/MPLS networks draft-ali-ccamp-gmpls-deployment-augmented-model-00.txt Zafar Ali George Swallow Mallik Tatipamula Tomohiro Otani Kenji Kumaki [email protected] [email protected] [email protected] [email protected] [email protected] 62th IETF Minneapolis March 2005 (CCAMP WG) Summary of Requirements • Deployment of GMPLS technology in existing IP/MPLS networks It is neither desirable nor practical to expect all routers to be GMPLS aware. The service networks can be non-GMPLS (e.g., all IP or legacy service networks). Need to find ways for (incremental) deployment of the optical regions with – minimum-to-no reconfiguration of the existing router region and vice versa. – No upgrade in the existing IP/MPLS routers. – Be able to make efficient use of resources in a heterogeneous network of routers and optical nodes/ devices. – Failure Transparency. A failure in optical network does not affect routing in packet networks, and vice versa. 62th IETF Minneapolis March 2005 (CCAMP WG) Draft Summary • GMPLS Deployment consideration is are a near charter item. • “draft-oki-ccamp-gmpls-ip-interworking-05.txt” already exists, It describes some migration scenarios from MPLS to GMPLS using the integrated model. • GMPLS architecture document lists three different scenarios in which GMPLS technology can be deployed: Overlay, Augmented Integrated. • This draft addresses GMPLS Deployment using the augmented model and illustrates the applicability of augmented model in deploying GMPLS technology in existing IP/ MPLS networks. 62th IETF Minneapolis March 2005 (CCAMP WG) Augmented Model CRS-1 OXC/ TDM GMPLS R2A R1A R1 R2 Optical NNI Optical NNI Optical NNI R1B Border Router MPLS Edge Router Router Topology Optical Topology • The “Augmented model” is a hybrid model between the full Peer and Overlay models. • Border Routers receive routing information from the optical devices as well as routers. • Border router keeps the optical and router domain topology information in separate routing tables. • No routing information from the router region is carried into the optical region, and vice versa. 62th IETF Minneapolis March 2005 (CCAMP WG) Topological View in Augmented Model O2 Router Region 1 Topology R3 R4 R2 R1 O4 R4 O1 O5 R5 R5 O2 O3 R3 2 2 O1 20 R7 2 2 1 R8 O4 1 2 1 2 1 O5 R6 1 1 Optical Region 1 1 1 R4 R5 5 1 1 1 1 R0 R6 Optical Topology R0 R2 Router Region 2 Topology R6 O3 R3 R8 R1 R7 62th IETF Minneapolis March 2005 (CCAMP WG) Next Actions • Merge the draft with draft-oki-ccamp-gmpls-ip-interworking-05.txt 62th IETF Minneapolis March 2005 (CCAMP WG)