--- 1/draft-ietf-isis-segment-routing-extensions-17.txt	2018-06-20 08:13:45.086086497 -0700
+++ 2/draft-ietf-isis-segment-routing-extensions-18.txt	2018-06-20 08:13:45.186088897 -0700
@@ -1,28 +1,28 @@
 
 IS-IS for IP Internets                                   S. Previdi, Ed.
 Internet-Draft                                          L. Ginsberg, Ed.
 Intended status: Standards Track                             C. Filsfils
-Expires: December 17, 2018                           Cisco Systems, Inc.
+Expires: December 22, 2018                           Cisco Systems, Inc.
                                                              A. Bashandy
 
                                                               H. Gredler
                                                             RtBrick Inc.
                                                             S. Litkowski
                                                              B. Decraene
                                                                   Orange
                                                              J. Tantsura
                                                           Nuage Networks
-                                                           June 15, 2018
+                                                           June 20, 2018
 
                   IS-IS Extensions for Segment Routing
-             draft-ietf-isis-segment-routing-extensions-17
+             draft-ietf-isis-segment-routing-extensions-18
 
 Abstract
 
    Segment Routing (SR) allows for a flexible definition of end-to-end
    paths within IGP topologies by encoding paths as sequences of
    topological sub-paths, called "segments".  These segments are
    advertised by the link-state routing protocols (IS-IS and OSPF).
 
    This draft describes the necessary IS-IS extensions that need to be
    introduced for Segment Routing operating on an MPLS data-plane.
@@ -43,21 +43,21 @@
    Internet-Drafts are working documents of the Internet Engineering
    Task Force (IETF).  Note that other groups may also distribute
    working documents as Internet-Drafts.  The list of current Internet-
    Drafts is at https://datatracker.ietf.org/drafts/current/.
 
    Internet-Drafts are draft documents valid for a maximum of six months
    and may be updated, replaced, or obsoleted by other documents at any
    time.  It is inappropriate to use Internet-Drafts as reference
    material or to cite them other than as "work in progress."
 
-   This Internet-Draft will expire on December 17, 2018.
+   This Internet-Draft will expire on December 22, 2018.
 
 Copyright Notice
 
    Copyright (c) 2018 IETF Trust and the persons identified as the
    document authors.  All rights reserved.
 
    This document is subject to BCP 78 and the IETF Trust's Legal
    Provisions Relating to IETF Documents
    (https://trustee.ietf.org/license-info) in effect on the date of
    publication of this document.  Please review these documents
@@ -611,27 +611,32 @@
       Type: TBD, suggested value 1
 
       Length: variable
 
       SID/Label: if length is set to 3 then the 20 rightmost bits
       represent a MPLS label.
 
 2.4.  SID/Label Binding TLV
 
    The SID/Label Binding TLV MAY be originated by any router in an IS-IS
-   domain.
+   domain.  There are multiple uses of the SID/Label Binding TLV.
 
-   The SID/Label Binding TLV is used to advertise prefixes to SID/Label
-   mappings.  This functionality is called the Segment Routing Mapping
-   Server (SRMS).  The behavior of the SRMS is defined in
+   The SID/Label Binding TLV may be used to advertise prefixes to SID/
+   Label mappings.  This functionality is called the Segment Routing
+   Mapping Server (SRMS).  The behavior of the SRMS is defined in
    [I-D.ietf-spring-segment-routing-ldp-interop].
 
+   The SID/Label BInding TLV may also be used to advertise a Mirror SID
+   to advertise the ability to process traffic originally destined to
+   another IGP node.  This behavior is defined in
+   [I-D.ietf-spring-segment-routing].
+
    The SID/Label Binding TLV has Type TBD (suggested value 149), and has
    the following format:
 
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |      Type     |     Length    |     Flags     |     RESERVED  |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |            Range              | Prefix Length |     Prefix    |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+