PCEP Extensions for Associated Bidirectional Label Switched Paths

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PCEP Extensions for Associated Bidirectional Label Switched Paths (LSPs) with Stateful PCE draft-barth-pce-association-bidir-01 Colby

PCEP Extensions for Associated Bidirectional Label Switched Paths (LSPs) with Stateful PCE draft-barth-pce-association-bidir-01 Colby Barth ([email protected] net) Rakesh Gandhi ([email protected] com) Bin Wen ([email protected] com) 98 th IETF @ Chicago

Agenda • • • Requirements and Scope Double-sided Initiation of Bidirectional LSP Single-sided Initiation

Agenda • • • Requirements and Scope Double-sided Initiation of Bidirectional LSP Single-sided Initiation of Bidirectional LSP PCEP Object Definitions Next Steps 98 th IETF @ Chicago

Requirements and Scope Requirements: • Packet transport networks deploying bidirectional LSPs • Co-routed and

Requirements and Scope Requirements: • Packet transport networks deploying bidirectional LSPs • Co-routed and non co-routed forward and reverse LSP paths • Asymmetric forward and reverse LSP bandwidths Scope: • Associated bidirectional LSPs • PCE-Initiated LSPs • PCC-Initiated LSPs • Stateless PCE (e. g. for co-routed path computation requests) 98 th IETF @ Chicago

Double-sided Initiation of Bidirectional LSPs can be co-routed or non co-routed STATEFUL PCE LSP

Double-sided Initiation of Bidirectional LSPs can be co-routed or non co-routed STATEFUL PCE LSP 1 Association initiated by PCE LSP 2 Association Type: Double-sided PCC Endpoint-A Node-B 98 th IETF @ Chicago Node-C PCC Endpoint-D

Single-sided Initiation of Bidirectional LSP • • • STATEFUL PCE LSP 1 (F, C)

Single-sided Initiation of Bidirectional LSP • • • STATEFUL PCE LSP 1 (F, C) LSP 2 (R, C) PCC Endpoint-A PCE or PCC Initiated LSPs Association initiated by PCC or PCE Endpoint-A signals RSVP REVERSE_LSP Object in LSP 1 Path message for reverse LSP 2 Association Type: Single-sided Bidirectional LSP Association TLV (Flags F, R, C) Node-B 98 th IETF @ Chicago Node-C Endpoint-D

PCEP ASSOCIATION Object • Association Type (TBD 1) = Single-sided Bidirectional LSP Association Group

PCEP ASSOCIATION Object • Association Type (TBD 1) = Single-sided Bidirectional LSP Association Group • Association Type (TBD 2) = Double-sided Bidirectional LSP Association Group • The Association ID, Association Source, Global Association Source and Extended Association ID in the Association Object of the bidirectional LSPs are populated using the procedures defined in [RFC 7551]. 98 th IETF @ Chicago

Bidirectional LSP Association Group TLV • F (Forward LSP, 1 bit) • Indicates whether

Bidirectional LSP Association Group TLV • F (Forward LSP, 1 bit) • Indicates whether the LSP associated is the forward LSP of the bidirectional LSP. • R (Reverse LSP, 1 bit) • Indicates whether the LSP associated is the reverse LSP of the bidirectional LSP. • C (Co-routed LSP, 1 bit) • Indicates whether the associated bidirectional LSP is co-routed. 98 th IETF @ Chicago

Next Steps • Useful functionality to have? • Welcome your comments and suggestions •

Next Steps • Useful functionality to have? • Welcome your comments and suggestions • Request for WG adoption 98 th IETF @ Chicago

Thank you. 98 th IETF @ Chicago

Thank you. 98 th IETF @ Chicago