Network Working Group K. Kompella (Juniper Networks) Internet Draft Y. Rekhter (Juniper Networks) Expiration Date: January 2002 A. Banerjee (Calient Networks) J. Drake (Calient Networks) G. Bernstein (Ciena) D. Fedyk (Nortel Networks) E. Mannie (GTS Network) D. Saha (Tellium) V. Sharma (Tellabs) OSPF Extensions in Support of Generalized MPLS draft-kompella-ospf-gmpls-extensions-02.txt 1. Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ``work in progress.'' The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. draft-kompella-ospf-gmpls-extensions-02.txt [Page 1] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 2. Abstract This document specifies encoding of extensions to the OSPF routing protocol in support of Generalized Multi-Protocol Label Switching (GMPLS). The description of the extensions is specified in [GMPLS- ROUTING]. 3. Summary for Sub-IP Area 3.1. Summary This document specifies encoding of extensions to the OSPF routing protocol in support of Generalized Multi-Protocol Label Switching (GMPLS). The description of the extensions is specified in [GMPLS- ROUTING]. 3.2. Where does it fit in the Picture of the Sub-IP Work This work fits squarely in either the CCAMP or OSPF box. 3.3. Why is it Targeted at this WG This draft is targeted at the CCAMP or the OSPF WG, because this draft specifies the extensions to the OSPF routing protocols in support of GMPLS, because GMPLS is within the scope of the CCAMP WG, and because OSPF is within the scope of the OSPF WG. 3.4. Justification The WG should consider this document as it specifies the extensions to the OSPF routing protocols in support of GMPLS. draft-kompella-ospf-gmpls-extensions-02.txt [Page 2] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 4. Introduction This document specifies extensions to the OSPF routing protocol in support of carrying link state information for Generalized Multi- Protocol Label Switching (GMPLS). The set of required enhancements to OSPF are outlined in [GMPLS-ROUTING]. 5. OSPF Routing Enhancements In this section we define the enhancements to the TE properties of GMPLS TE links that can be announced in OSPF TE LSAs. The Traffic Engineering (TE) LSA, which is an opaque LSA with area flooding scope [3], has only one top-level Type/Length/Value (TLV) triplet and has one or more nested TLVs for extensibility. The top-level TLV can take one of two values (1) Router Address or (2) Link. In this document, we enhance the sub-TLVs for the Link TLV in support of GMPLS. Specifically, we add the following sub-TLVs: 1. Outgoing Interface Identifier, 2. Incoming Interface Identifier, 3. Link Protection Type, 4. Shared Risk Link Group, and 5. Interface Switching Capability Descriptor. This brings the list of sub-TLVs of the TE Link TLV to: Sub-TLV Type Length Name 1 1 Link type 2 4 Link ID 3 4 Local interface IP address 4 4 Remote interface IP address 5 4 Traffic engineering metric 6 4 Maximum bandwidth 7 4 Maximum reservable bandwidth 8 32 Unreserved bandwidth 9 4 Resource class/color 11 4 Outgoing Interface Identifier 12 4 Incoming Interface Identifier 14 4 Link Protection Type 16 variable Shared Risk Link Group 15 variable Interface Switching Capability Descriptor 32768-32772 - Reserved for Cisco-specific extensions draft-kompella-ospf-gmpls-extensions-02.txt [Page 3] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 5.1. Outgoing Interface Identifier An Outgoing Interface Identifier is a sub-TLV of the Link TLV with type 11, length 4, and value equal to the assigned identifier. 5.2. Incoming Interface Identifier An Incoming Interface Identifier is a sub-TLV of the Link TLV with type 12, length 4, and value equal to the assigned identifier. 5.3. Link Protection Type The Link Protection Type is a sub-TLV of the Link TLV, with type 14, and length of four octets, the first of which is a bit vector describing the protection capabilities of the link. They are: 0x01 Extra Traffic 0x02 Unprotected 0x04 Shared 0x08 Dedicated 1:1 0x10 Dedicated 1+1 0x20 Enhanced 0x40 Reserved 0x80 Reserved 5.4. Shared Risk Link Group (SRLG) The SRLG is a sub-TLV of the Link TLV with type 16. The length is the length of the list in octets. The value is an unordered list of 32 bit numbers that are the SRLGs that the link belongs to. The format is as shown below: draft-kompella-ospf-gmpls-extensions-02.txt [Page 4] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 16 | 4 * No. of SRLGs in link | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Shared Risk Link Group Value | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ............ | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Shared Risk Link Group Value | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 5.5. Interface Switching Capability Descriptor The Interface Switching Capability Descriptor is a sub-TLV of the Link TLV with type 15. The length is the length of value field in octets. The format of the value field is as shown below: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Switching Cap | Encoding | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 1 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 3 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 4 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 6 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Max LSP Bandwidth at priority 7 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Switching Capability-specific information | | (variable) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ The Switching Capability (Switching Cap) field contains one of the draft-kompella-ospf-gmpls-extensions-02.txt [Page 5] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 following values: 1 Packet-Switch Capable-1 (PSC-1) 2 Packet-Switch Capable-2 (PSC-2) 3 Packet-Switch Capable-3 (PSC-3) 4 Packet-Switch Capable-4 (PSC-4) 51 Layer-2 Switch Capable (L2SC) 100 Time-Division-Multiplex Capable (TDM) 150 Lambda-Switch Capable (LSC) 200 Fiber-Switch Capable (FSC) The Encoding field contains one of the values specified in Section 3.1.1 of [GMPLS-SIG]. Maximum LSP Bandwidth is encoded as a list of eight 4 octet fields in the IEEE floating point format, with priority 0 first and priority 7 last. The content of the Switching Capability specific information field depends on the value of the Switching Capability field. When the Switching Capability field is PSC-1, PSC-2, PSC-3, PSC-4, or L2SC, there is no specific information. When the Switching Capability field is TDM, the specific information includes Minimum LSP Bandwidth, which is is encoded in a 4 octets field in the IEEE floating point format. When the Switching Capability field is LSC, there is no specific information. 6. Security Considerations The sub-TLVs proposed in this document does not raise any new security concerns. draft-kompella-ospf-gmpls-extensions-02.txt [Page 6] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 7. Acknowledgements The authors would like to thank Suresh Katukam, Jonathan Lang and Quaizar Vohra for their comments on the draft. 8. References [OSPF-TE] Katz, D., Yeung, D., "Traffic Engineering Extensions to OSPF", draft-katz-yeung-ospf-traffic-04.txt (work in progress) [GMPLS-SIG] "Generalized MPLS - Signaling Functional Description", draft-ietf-mpls-generalized-signaling-04.txt (work in progress) [GMPLS-ROUTING] "Routing Extensions in Support of Generalized MPLS", draft-many-ccamp-gmpls-routing-00.txt 9. Authors' Information Kireeti Kompella Juniper Networks, Inc. 1194 N. Mathilda Ave Sunnyvale, CA 94089 Email: kireeti@juniper.net Yakov Rekhter Juniper Networks, Inc. 1194 N. Mathilda Ave Sunnyvale, CA 94089 Email: yakov@juniper.net Ayan Banerjee Calient Networks 5853 Rue Ferrari San Jose, CA 95138 Phone: +1.408.972.3645 Email: abanerjee@calient.net draft-kompella-ospf-gmpls-extensions-02.txt [Page 7] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 John Drake Calient Networks 5853 Rue Ferrari San Jose, CA 95138 Phone: (408) 972-3720 Email: jdrake@calient.net Greg Bernstein Ciena Corporation 10480 Ridgeview Court Cupertino, CA 94014 Phone: (408) 366-4713 Email: greg@ciena.com Don Fedyk Nortel Networks Corp. 600 Technology Park Drive Billerica, MA 01821 Phone: +1-978-288-4506 Email: dwfedyk@nortelnetworks.com Eric Mannie GTS Network Services RDI Department, Core Network Technology Group Terhulpsesteenweg, 6A 1560 Hoeilaart, Belgium Phone: +32-2-658.56.52 E-mail: eric.mannie@gtsgroup.com Debanjan Saha Tellium Optical Systems 2 Crescent Place P.O. Box 901 Ocean Port, NJ 07757 Phone: (732) 923-4264 Email: dsaha@tellium.com draft-kompella-ospf-gmpls-extensions-02.txt [Page 8] Internet Draft draft-kompella-ospf-gmpls-extensions-02.txt July 2001 Vishal Sharma Jasmine Networks, Inc. 3061 Zanker Rd, Suite B San Jose, CA 95134 Phone: (408) 895-5000 draft-kompella-ospf-gmpls-extensions-02.txt [Page 9]