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Liaison statement
Update on MPLS-TP protection work in MPLS and PALS working groups

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State Posted
Submitted Date 2016-05-17
From Groups mpls, pals
From Contact Scott Mansfield
To Group ITU-T-SG-15
To Contacts
Cc Alvaro Retana <>
Deborah Brungard <>
Multiprotocol Label Switching Discussion List <>
Stewart Bryant <>
Scott Mansfield <>
George Swallow <>
Pseudowire And LDP-enabled Services Discussion List <>
John Drake <>
Alia Atlas <>
Andrew Malis <>
Loa Andersson <>
Ross Callon <>
Response Contact Loa Andersson <>
George Swallow <>
Ross Callon <>
Andrew Malis <>
Stewart Bryant <>
Technical Contact Scott Mansfield <>
Purpose In response
Attachments (None)
Liaisons referred by this one LS on work on MPLS-TP protection
The MPLS and PALS Working Groups are pleased to hear about the continued
progress on the MPLS Transport Profile and continued alignment with IETF RFCs.

We confirm that "MPLS-TP Shared-Ring protection (MSRP) mechanism for ring
( is
progressing in the MPLS WG, and invite comments on this draft to the MPLS WG
mailing list ( In addition, we are also progressing a draft on
"Resilient MPLS Rings" (

The PALS WG currently has two drafts in progress that are relevant to MPLS-TP
pseudowire linear protection:

These drafts provide a fast protection mechanism for MPLS-TP PWs to protect
dual-homed CEs against failures of their attachment circuits or PE routers. The
drafts are ongoing work and were very recently updated. We hope to complete
work on these drafts by the upcoming IETF meeting in Berlin on July 17-22,
2016, and would very much appreciate SG15’s review and comments to the email list.

We are also pleased to hear about the second amendment to Recommendation ITU-T
G.8131/Y.1382, "Linear protection switching for MPLS transport profile."

In addition to maintaining communication with liaisons, please engage on the
MPLS WG mailing list ( and PALS WG mailing list (
which provide a more timely view of the state of the work.

MPLS and PALS wg co-chairs