RFC 6325, "Routing Bridges (RBridges): Base Protocol Specification", July 2011

Note: This RFC has been updated by RFC 6327, RFC 6439, RFC 7172, RFC 7177, RFC 7357, RFC 7179, RFC 7180, RFC 7455, RFC 7780, RFC 7783, RFC 8139, RFC 8249, RFC 8361, RFC 8377

Errata ID: 3004
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Donald E. Eastlake, 3rd
Date Reported: 2011-10-25
Verifier Name: Ralph Droms
Date Verified: 2013-03-09

Section 4.3.2 says:

                                    The MTU-probe MAY be multicast to
   All-RBridges, or unicast to a specific RBridge.  The MTU-ack is
   normally unicast to the source of the MTU-probe to which it responds
   but MAY be multicast to All-RBridges.

It should say:

                                     The MTU-probe MUST be multicast to
   All-IS-IS-RBridges or unicast to a specific RBridge.  The MTU-ack is
   normally unicast to the source of the MTU-probe to which it responds
   but MAY be multicast to All-IS-IS-RBridges.

Notes:

TRILL IS-IS MTU PDUs are IS-IS PDUs and, when multicast, must be sent to the All-IS-IS-RBridges multicast address.

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