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LDP End-of-LIB

LDP End-of-LIB. draft-ietf-mpls-ldp-end-of-lib-00.txt IETF 72. Bob Thomas Pradosh Mohapatra Emily Chen Rajiv Asati. Agenda. Motivation Proposal Changes since draft-asati-…-01 version Next step. Motivation.

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LDP End-of-LIB

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  1. LDP End-of-LIB draft-ietf-mpls-ldp-end-of-lib-00.txt IETF 72 Bob Thomas Pradosh Mohapatra Emily Chen Rajiv Asati draft-ietf-mpls-ldp-end-of-lib-00.txt

  2. Agenda • Motivation • Proposal • Changes since draft-asati-…-01 version • Next step draft-ietf-mpls-ldp-end-of-lib-00.txt

  3. Motivation • There are scenarios where it would be useful for an LDP speaker to know when a peer had finished advertising all labels for a given FEC Type. • Scenarios such as • LDP-IGP Sync • LDP Graceful Restart • Label Request with a typed Wildcard FEC • The LDP Specification [RFC5036] specifies no mechanism for an LDP speaker to achieve the above. draft-ietf-mpls-ldp-end-of-lib-00.txt

  4. Proposal • The draftspecifies using LDP Notification message with (new) ‘End-of-LIB’ status code by an LDP speaker to signal its completion of label advertisements (for a FEC type) following the LDP session establishment. • The draft also specifies use of a new LDP capability* to convey that the speaker is capable of handling (received) Notification message that may carry Unrecognized Status codes. * draft-ietf-mpls-ldp-capabilities draft-ietf-mpls-ldp-end-of-lib-00.txt

  5. Proposal (contd.) • A Notification message signaling End-of-LIB Status code carries: • Status TLV with End-of-LIB Status Code • FEC TLV with a Typed Wildcard FEC element draft-ietf-mpls-ldp-end-of-lib-00.txt

  6. . . . . . . . . . . . . R1 R2 Keepalive Keepalive LabelMapping(FEC1(ipv4), Label11) LabelMapping(FEC1(ipv4), Label21) LabelMapping(FECn(ipv4), Label1n) LabelMapping(FECn(ipv4), Label2n) Example Scenario Initialization(CommonSessParams, ..., Unrecognized Notification Capability TLV) Initialization(CommonSessParams, ..., Unrecognized Notification Capability TLV) Session Up Notification(End-of-LIB, FEC(TypedWildcard, ipv4) Notification(End-of-LIB, FEC(TypedWildcard, ipv4) draft-ietf-mpls-ldp-end-of-lib-00.txt

  7. Changes since the last version… • This is now a WG adopted item. • The last version was draft-asati-mpls-ldp-end-of-lib-01. draft-ietf-mpls-ldp-end-of-lib-00.txt

  8. Changes since last version (contd.) • Added two sentences in section 4 to • explicitly state that the LDP speaker may send the End-of-LIB Notify message even if it had no binding to advertise. • clarify that the proposal is applicable to both LDP and directed LDP peers. • Added a sentence in section 5.4 to clarify the behavior if End-of-LIB Notify message is ignored after the time-out. • Updated the section 8 to acknowledge those who provided the feedback so far. • Few minor editorial changes. draft-ietf-mpls-ldp-end-of-lib-00.txt

  9. Next Steps • Authors believe that this is ready for the WG Last Call. • Next step !! draft-ietf-mpls-ldp-end-of-lib-00.txt

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