Ldp extensions for pseudo wire transfer in mpls tp network draft bao pwe3 pw transfer 03
This presentation is the property of its rightful owner.
Sponsored Links
1 / 10

LDP Extensions for Pseudo Wire Transfer in MPLS-TP Network draft-bao-pwe3-pw-transfer-03 PowerPoint PPT Presentation


  • 68 Views
  • Uploaded on
  • Presentation posted in: General

LDP Extensions for Pseudo Wire Transfer in MPLS-TP Network draft-bao-pwe3-pw-transfer-03. Qilei Wang, Muliu Tao, Lizhong Jin, Xihua Fu ZTE Ruiquan Jing, Xiaoli Huo China Telecom. Changes compared to 01 version. ER-TLV is added to carry the PW path information

Download Presentation

LDP Extensions for Pseudo Wire Transfer in MPLS-TP Network draft-bao-pwe3-pw-transfer-03

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Ldp extensions for pseudo wire transfer in mpls tp network draft bao pwe3 pw transfer 03

LDP Extensions for Pseudo Wire Transfer in MPLS-TP Networkdraft-bao-pwe3-pw-transfer-03

Qilei Wang, Muliu Tao, Lizhong Jin, Xihua Fu ZTE

Ruiquan Jing, XiaoliHuo China Telecom


Changes compared to 01 version

Changes compared to 01 version

  • ER-TLV is added to carry the PW path information

  • Add clarification about transfer failure.

2


Contents in this draft

Contents in this draft

  • Advantages compared with MBB

  • LDP extensions and procedures

    • PW Transfer Capability TLV

    • PW Ownership Transfer TLV

    • SP-PE TLV or ER-TLV

3


Advantages

Advantages

  • Compare with MBB, PW transfer in this document have following advantages:

    • FEC label binding would not be modified.

    • PW LSP binding would not be modified.

    • Extra data plane resource is not needed.

    • Available and efficient batch operation.

4


Requirements

Requirements

  • Requirements

    • RFC6373

      • Section 5.3.3 describes the dynamic transfer of PW Control/Ownership to satisfy the requirement 47.

    • Requirements in RFC5493 also apply (e.g., No disruption of user traffic during the process of transfer).

  • Consistency in the process of transfer

    • PW attributes MUST not be changed

    • PW transfer MUST be independent of LSP

    • Support partial MS-PW segments transfer

5


Ldp extensions

LDP Extensions

  • PW Transfer Capability TLV

    • Carried in LDP Initialization Message (RFC5561)

    • Negotiating the PW transfer capability between LDP peers

  • SP-PE TLV (RFC6073) and ER-TLV (mspw-er)

    • Both are used to carry data plane PW path information

    • PW Ownership Transfer TLV

      • Carried in Label mapping and notification message

6


Mp to cp transfer procedure ss pw

MP to CP transfer Procedure (SS-PW)

  • T-PEs

    • Negotiate PW transfer capability

    • Send/Receive Label Mapping message with PW Transfer TLV

    • Create/Maintain PW signaling state in CP

7


Mp to cp transfer procedure ms pw

MP to CP transfer Procedure (MS-PW)

  • T-PEs

    • Perform all the procedures in MP2CP SS-PW transfer plus

      • Encoding PW path into SP-PE TLV or ER-TLV

    • S-PE

      • Create PW LDP signaling state in CP

      • Decode the SP-PE TLV or ER-TLV to find the next hop

      • Forward Label Mapping message to the next hop

8


Cp to mp transfer procedure

CP to MP Transfer Procedure

  • T-PEs

    • Send CP2MP PW transfer Notification message

    • Delete T-LDP session according to local policy

    • S-PEs

      • Forward Notification message

      • Delete T-LDP session according to the local policy

9


Next step

Next step

  • Refine the document according to the feedback of this meeting and mailing list.

10


  • Login