LISP Site External Connectivity
draft-jain-lisp-site-external-connectivity-02
Network Working Group P. Jain
Internet-Draft V. Moreno
Intended status: Experimental S. Hooda
Expires: April 29, 2021 Cisco Systems
October 26, 2020
LISP Site External Connectivity
draft-jain-lisp-site-external-connectivity-02
Abstract
This draft defines how to register/retrieve default-pETR mapping
information in LISP when the destination is not registered/known to
the local site and its mapping system (e.g. the destination is an
internet or external site destination).
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on April 29, 2021.
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Provisions Relating to IETF Documents
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Definition of Terms . . . . . . . . . . . . . . . . . . . . . 3
3. pETR Registration/Notification . . . . . . . . . . . . . . . 3
4. pETR Request/Resolution . . . . . . . . . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. Security Considerations . . . . . . . . . . . . . . . . . . . 4
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4
8. Normative Reference . . . . . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
The LISP architecture and protocol [I-D.ietf-lisp-rfc6833bis]
introduces two types of replies to a map-request sent by an ITR:
- when the EID is known or registered to the mapping system, a
regular map-reply with mapping information is sent, or
- when the EID is unknown or known but not registered, a negative-
map-reply (NMR) is sent.
Currently the NMR does not convey pETR RLOC-set information to
specify where the ITR should send the packet.
This document describes how to use the LISP messages to register and
provide pETR RLOC-set information for destinations which are EIDs not
registered with the Mapping System, or simply are "not known" to be
an existing EID. These destinations could be the destinations which
are outside of the LISP site belonging to non-LISP domains, hence are
not registered with the LISP Mapping System.
The reachability of these destinations can be provided either by
configuring pETR information directly into the Mapping System, or by
the registration done by certain pETRs. The pETR registration is
specifically useful when the traffic to these external destinations
needs to be sent encapsulated to a preferred pETR/gateway chosen
dynamically. This mechanism also helps to achieve faster
convergence.
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This document also specifies the structure of the map-reply
containing pETR RLOC-set information.
2. Definition of Terms
Same as defined in [I-D.ietf-lisp-rfc6833bis].
3. pETR Registration/Notification
pETRs having external or internet connectivity MAY register the pETR
with the mapping system. The pETR Map-Register/Map-Notify procedures
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