rfc9798v2.txt   rfc9798.txt 
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Specifically, the assignment of the underlay multicast group needs to Specifically, the assignment of the underlay multicast group needs to
be done in consonance with the downstream Tunnel Router (xTR) nodes be done in consonance with the downstream Tunnel Router (xTR) nodes
needed to avoid unnecessary replication or traffic hairpinning. needed to avoid unnecessary replication or traffic hairpinning.
Since the Receiver RLOC Attribute defined in [RFC8059] only addresses Since the Receiver RLOC Attribute defined in [RFC8059] only addresses
the Ingress Replication case, this document extends the scope of that the Ingress Replication case, this document extends the scope of that
PIM Join/Prune attribute to include scenarios where the underlay uses PIM Join/Prune attribute to include scenarios where the underlay uses
multicast transport. The scope extension complies with the base multicast transport. The scope extension complies with the base
specification [RFC5384]. specification [RFC5384].
This document uses terminology defined in [RFC9300], such as EID, This document uses terminology defined in [RFC6831], such as EID,
RLOC, ITR, and ETR. RLOC, ITR and ETR.
1.1. Requirements Language 1.1. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in "OPTIONAL" in this document are to be interpreted as described in
BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here. capitals, as shown here.
2. The Case for Extending the Received ETR RLOC Attribute of RFC 8059 2. The Case for Extending the Received ETR RLOC Attribute of RFC 8059
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