Extensions to the Path Computation Element Communication Protocol
- Slides: 5
Extensions to the Path Computation Element Communication Protocol (PCEP) for Route Exclusions draft-ietf-pcep-xro-03. txt March 11, 2008 Eiji Oki (NTT) Adrian Farrel (Old Dog Consulting) draft-ietf-pcep-xro-03. txt 1
Summary of this draft • This draft defines protocol extensions. – Allow PCC to specify route exclusions to PCE on path computation request. • PCECP generic requirements [RFC 4657] includes route exclusions. • Reminder. . . – Not part of base PCEP specification draft-ietf-pcep-xro-03. txt 2
Summary of this draft (Cont’d) • Modeled on RFC 4874 • Exclude Route List – New PCEP object defined as the Exclude Route Object (XRO). • Explicit Route Exclusions – Existing Include Route Object (IRO) in PCEP modified by introducing • New IRO subobject, • Explicit Exclusion Route Subobject (EXRS) draft-ietf-pcep-xro-03. txt 3
To be Changed for 04 • Comment from Fabien on AS Number subobject. • 03 – XRO allows 2 or 4 byte AS numbers, but PCEP draft (as RSVP-TE) allows only 2 byte AS numbers. • 04 – XRO will change to allow only 2 byte AS numbers. • New subobjects can be introduced for 4 byte AS numbers as and when needed. draft-ietf-pcep-xro-03. txt 4
Next step… • After the revision on AS subobject, the draft will be ready for WG Last Call. • Multiple implementation is in progress. draft-ietf-pcep-xro-03. txt 5
