ICMP Extensions for Multiprotocol Label Switching

Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Abstract This memo defines an extension object that can be appended to selected multi-part ICMP messages. This extension permits Label Switching Routers to append MPLS information to ICMP messages, and has already been widely deployed.