1 / 6

Adrian Farrel ( adrian@olddog.co.uk ) Dimitri Papadimitriou ( dimitri.papadimitriou@alcatel.be )

Encoding of Attributes for Multiprotocol Label Switching Label Switched Path Establishment Using RSVP-TE draft-farrel-mpls-rsvpte-attributes-00.txt. Adrian Farrel ( adrian@olddog.co.uk ) Dimitri Papadimitriou ( dimitri.papadimitriou@alcatel.be ) Jean-Philippe Vasseur ( jpv@cisco.com ).

menefer
Download Presentation

Adrian Farrel ( adrian@olddog.co.uk ) Dimitri Papadimitriou ( dimitri.papadimitriou@alcatel.be )

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Encoding of Attributes for Multiprotocol Label Switching Label Switched Path Establishment Using RSVP-TEdraft-farrel-mpls-rsvpte-attributes-00.txt Adrian Farrel (adrian@olddog.co.uk) Dimitri Papadimitriou (dimitri.papadimitriou@alcatel.be) Jean-Philippe Vasseur (jpv@cisco.com) 58th IETF, Minneapolis, November 2003

  2. The Problem – Session_Attribute Flags +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Setup Prio | Holding Prio | Flags | Name Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | // Session Name (NULL padded display string) // | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ • Existing Flags RFC 3209 daft-ietf-mpls-rsvp-lsp-fastreroute-03 0x01 Local protection desired 0x08 Bandwidth protection desired 0x02 Label recording desired 0x10 Node protection desired 0x04 SE Style desired • Other Flags Needed draft-iwata-mpls-rsvp-crankback-06 draft-vasseur-mpls-loose-path-reopt-02 0x20 End-to-end re-routing desired 0x20 ERO Expansion request 0x40 Hierarchical re-routing desired draft-ietf-mpls-soft-preemption-01 0x80 Segment-based re-routing desired 0x40 Soft preemption desired draft-vasseur-inter-as-te-01 Crankback allowed bit Contiguous LSP required bit LSP stitching required bit 58th IETF, Minneapolis, November 2003

  3. Requirements • Need more per-LSP bit flags • Solution should be long-lived • While we’re at it, what about scope for arbitrary LSP attributes using TLVs? 58th IETF, Minneapolis, November 2003

  4. Rejected Solution • New C-Type for Session_Attribute +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Extra Flags | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Setup Prio | Holding Prio | Flags | Name Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | // Session Name (NULL padded display string) // | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ • Would have created two new C-Types (with and without resource affinities) • Backwards compatibility issues • Can’t handle unknown C-Types • No scope for TLVs 58th IETF, Minneapolis, November 2003

  5. Solution • Two new objects • Contain TLVs • One TLV is defined with 32 bit flags • Other TLVs to be defined as needed • One C-Num 11bbbbbb is passed transparently by legacy LSRs • One C-Num 0bbbbbbb must be processed at each LSR 58th IETF, Minneapolis, November 2003

  6. Issues • Is this a problem we want to solve now? • Do we need to add support for arbitrary TLVs? • Is adding a new object the right solution? • Do we need two C-Nums?(explanation of why is in the draft) • Usual question – working group adoption? 58th IETF, Minneapolis, November 2003

More Related