1 / 8

Dual-Homing Protection for MPLS-TP PW

Dual-Homing Protection for MPLS-TP PW . Weiqiang Cheng , L. Wang, H. Li (China Mobile) K. Liu, J. Dong (Huawei) S. Davari (Broadcom). IETF90 PWE3 Toronto 2014. Background. This draft was written to resolve an MPLS-TP base backhual operational issue Was presented in IETF 88

gusty
Download Presentation

Dual-Homing Protection for MPLS-TP PW

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. Dual-Homing Protection for MPLS-TP PW Weiqiang Cheng, L. Wang, H. Li (China Mobile) K. Liu, J. Dong (Huawei) S. Davari (Broadcom) • IETF90 PWE3 Toronto 2014

  2. Background • This draft was written to resolve an MPLS-TP base backhual operational issue • Was presented in IETF 88 • Revised to solve the received comments • Renamed as draft-cheng-pwe3-mpls-tp-dual-homing-protection

  3. Applicability of Different Mechanisms • PW Redundancy (RFC 6718) • Dual-homing protection based on LDP control plane • MPLS-TP Linear Protection (RFC 6378) • End-to-End protection based on PSC • Dual-homing not covered • MPLS-TP PW Dual-Homing Protection • Dual-homing protection based on MPLS-TP linear protection • Applicable for deployed mobile backhaul networks

  4. Typical Scenario linear protection • Provide protection for: • AC failure • PE failure • PSN network failure 2 PE1 AC1 1 working PW 3 Service PW AC dual-homing protection DNI PW CE1 PE3 CE2 Service PW PE2 protection PW AC2 linear protection dual-homing coordination

  5. Proposed Solution • MPLS-TP Linear protection is deployed between single-homing PE and the peering dual-homing PEs • New Dual-Homing Coordination (DHC) message for state synchronization and switching coordination between the dual-homing PEs • New ACh channel type • Dual-Node Interconnection (DNI) PW for traffic bridging between the dual-homing PEs during failure • Enable local protection

  6. Procedures • Dual-Homing PEs exchange PW status and protection coordination request using the DHC message • Protection Behavior of dual-homing PEs is determined by: • Status of Service PW • Status of AC • Status of DNI PW Service PW AC DNI PW

  7. Benefits • Extends MPLS-TP Linear protection to PW dual-homing scenarios • Support local protection, avoid PW switchover due to AC failure • Can work without PSN tunnel protection

  8. Next Steps • Solicit comments from WG • Revise the draft • WG adoption?

More Related