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Liaison statement
LS on intent to initiate approval of Amendment to MPLS-TP Recommendation

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State Posted
Submitted Date 2023-05-05
From Group ITU-T-SG-15
From Contact Hiroshi Ota
To Group mpls
To Contacts Loa Andersson <>
Nicolai Leymann <>
Tarek Saad <>
Cc John Scudder <>
Jim Guichard <>
Scott Mansfield <>
Andrew Alston <>
Tarek Saad <> <>
Nicolai Leymann <>
John Drake <>
Multiprotocol Label Switching Discussion List <>
Loa Andersson <>
Response Contact
Purpose For information
Attachments SG15-LS055_Att1
This liaison announces the planned to initiate the approval process of
Amendment 1 to Recommendation ITU-T G.8121/Y.1381.

ITU-T SG15 wishes to inform the IETF MPLS WG of our intent to initiate the
approval process for the following document related to MPLS-TP at the December
2023 plenary meeting of Study Group 15:

• Amendment 1 to Recommendation ITU-T G.8121/Y.1381 Characteristics of MPLS-TP
equipment functional blocks.

This amendment adds an alternative mechanism for mapping MPLS-TP packets to OTN
and includes editorial updates. The current draft of this amendment is attached.

The next meeting of ITU-T SG15 Question 10 is in Geneva, Switzerland, 20
November – 1 December 2023.

– Draft Amendment 1 to Recommendation ITU-T G.8121/Y.1381 (SG15-TD181/WP3).