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Tomohiro Otani otani@kddilabs.jp Kenichi Ogaki ogaki@kddilabs.jp

GMPLS Inter-Domain Routing in support of inter-domain links draft-otani-ccamp-gmpls-routing-interlink-01.txt. Tomohiro Otani otani@kddilabs.jp Kenichi Ogaki ogaki@kddilabs.jp Shuichi Okamoto okamoto@kddilabs.jp. Summary of this draft. This draft

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Tomohiro Otani otani@kddilabs.jp Kenichi Ogaki ogaki@kddilabs.jp

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  1. GMPLS Inter-Domain Routing in support of inter-domain linksdraft-otani-ccamp-gmpls-routing-interlink-01.txt Tomohiro Otani otani@kddilabs.jp Kenichi Ogaki ogaki@kddilabs.jp Shuichi Okamoto okamoto@kddilabs.jp 70th IETF meeting, Dec. 2007

  2. Summary of this draft • This draft • describes the problem of the current GMPLS routing in order to deal with inter-domain TE links for GMPLS inter-domain signaling. • states the GMPLS inter-domain routing requirements in support of exchanging of inter-domain TE link information.(Protocol neutral) • What are issues at this moment? • No mechanism defined to effectively exchange such inter-domain TE link information. 70th IETF meeting, Dec. 2007

  3. Assumed network | +-------+ +-------+ | +-------+ +-------+ | | | | IDL-out | | | | | |----//--->|Domain |---------->|Domain |----//----| | |Ingress| |Border | |Border | |Egress | | | |Node 1 | IDL-in |Node 2 | | | | |<---//----| |<----------| |<---//----| | | | | | | | | | | +-------+ +-------+ | +-------+ +-------+ | GMPLS domain 1 | GMPLS domain 2 EGP: - BGP-4 - none IGP: - OSPF - OSPF-TE IGP: - OSPF - OSPF-TE Reachability TE *IDL: Inter-domain link 70th IETF meeting, Dec. 2007

  4. Path computation • Per-domain path computation or PCE is considered. • MPLS LSP case • Unidirectional: IDL-out is only required. • “draft-ietf-ccamp-ospf-interas-te-extension-02.txt” defines static configuration of IDL and the distribution mechanism by IGP. • GMPLS LSP case • Bi-directional: Both IDL-in and IDL-out are required. • TED may not be able to contain IDL-out information if this is statically configured. • The path computation might be failed • if unidirectional paths are created and available bandwidth of inter-domain links may be asymmetric between IDL-in and IDL-out. • if TE information is different between IDL-in and IDL-out. 70th IETF meeting, Dec. 2007

  5. GMPLS inter-domain routing requirements • In addition to outgoing inter-domain links, incoming inter-domain links with TE information should be distributed to the own domain • With appropriate GMPLS attributes such as a switching capability and an encoding type. • The TED in each domain can contain inter-domain TE links for path computation. The TED may be synchronized with the database in the PCE. • The incoming inter-domain link should be statically and locally configured. A dynamically exchanging mechanism would be preferred reflecting aliveness of adjacent inter-domain border nodes or links. • The introduction of this capability should not affect routing scalability and ensure the confidentiality in each domain. 70th IETF meeting, Dec. 2007

  6. Next Step • We propose to adopt this as a working group document since this is a critical issue for PCE and CSPF engine at the ingress in GMPLS networks. • We will update functional requirements reflecting comments in the list. • We will start to investigate protocol definition. 70th IETF meeting, Dec. 2007

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