Path Computation Element BOF (pce) Wednesday, November 10 at 1530-1730 =================================== CHAIR: P Vasseur (jvasseur@cisco.com) Adrian Farrel (adrian@olddog.co.uk) AGENDA: 1) Introduction, admin, statement of objectives of this second PCE BOF 2) Quick summary of the conclusion of the first BOF held in San Diego 3) Problem space: recap of the PCE architecture ID 4) Summary of existing and updated drafts a. draft-farrel-ccamp-interdomain-framework-00.txt b. draft-vasseur-ccamp-inter-area-as-te-comp-00.txt c. draft-vasseur-mpls-computation-rsvp d. draft-oki-ccamp-gtep-00.txt 5) New drafts published since IETF-60 a. draft-draft-ogino-pce-recovery-pc-model-00.txt b. draft-mescal draft-mescal-pcp-proto-00.txt (?) c. draft-mescal-pce-fwk-00.txt (?) 6) Discussion of the proposed architecture 7) Discussion about the need for a WG 8) Proposed charter (see below) 9) Summary and conclusions DESCRIPTION: In certain MPLS TE networks it may be beneficial or desirable to have path computation performed by a distinct node (termed the Path Computation Element – PCE) that is not the LSR that needs to know the path. This BOF examines the scope of such function, what extensions to existing protocols might be required, what additional protocols may need to be developed, and whether there is cause and support for this work within the IETF. Proposed Charter WG items: - Functional specification of Generalized Traffic Engineered LSP path computation techniques involving Path Computation Element(s). This includes the case of intra IGP area, inter IGP area, inter-AS and inter-provider TE LSPs path computation for both Point to Point, Point to Multipoint and Multipoint to Multipoint TE LSPs. - Specification of routing (OSPF, ISIS, BGP) and signaling (RSVP-TE) extensions required by PCE-based path computation techniques. Specification of routing extensions in support of PCE discovery techniques within an IGP area and across multiple IGP areas, ASes and Provider networks. The proposed extensions will done in conjunction with the WGs in charge of the specification of those protocols. - Specification of new protocols or modifications to existing protocols to facilitate communication between LSRs and PCEs, and between a PCE and other PCEs. - Definition of protocol-independent metrics defining path quality measurement criteria, algorithm complexity and scalability criteria related to path computation techniques. - Specification of requirements and protocol extensions related to the policy, security and confidentiality aspects of PCE-based path computation techniques involving PCEs of multiple Providers. - Definition of MIBs and management procedures related to the new protocols, protocol extensions and operational elements defined by the WG. The WG will work closely with the following other WGs: CCAMP, MPLS, ISIS, OSPF; and will also cooperate with the ITU-T and OIF where appropriate.