Internet Engineering Task Force (IETF) G. Tsirtsis
Request for Comments: 6626 V. Park
Updates: 5177 V. Narayanan
Category: Standards Track Qualcomm
ISSN: 2070-1721 K. Leung
Cisco
May 2012
Dynamic Prefix Allocation for
Network Mobility for Mobile IPv4 (NEMOv4)
Abstract
The base Network Mobility for Mobile IPv4 (NEMOv4) specification
defines extensions to Mobile IPv4 for mobile networks. This
specification defines a dynamic prefix allocation mechanism for
NEMOv4.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6626.
Copyright Notice
Copyright (c) 2012 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
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Tsirtsis, et al. Standards Track [Page 1]RFC 6626 Dynamic Prefix Allocation for NEMOv4 May 2012Table of Contents
1. Introduction ....................................................2
2. Requirements Notation ...........................................2
3. Dynamic Mobile Prefix Allocation ................................2
3.1. Mobile Client Considerations ...............................2
3.2. Home Agent Considerations ..................................3
4. Security Considerations .........................................4
5. IANA Considerations .............................................4
6. Acknowledgements ................................................4
7. Normative References ............................................4
1. Introduction
The base NEMOv4 specification [RFC5177] defines extensions to Mobile
IPv4 [RFC5944] for mobile networks. This specification adds support
for dynamic allocation of mobile prefixes by the home agent.
2. Requirements Notation
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 [RFC2119].
3. Dynamic Mobile Prefix Allocation
The following extension is defined according to this specification.
3.1. Mobile Client Considerations
According to this specification, the Prefix field of the Mobile
Network Request extension MUST be set to zero to indicate that the
Mobile Router requests mobile network prefix(es) be assigned to it by
the home agent. In this case, the Mobile Router MAY set the prefix
length field of such extensions to zero or to a length of its choice
as a hint to the home agent. According to this specification, Mobile
Network Request extensions with the Prefix field set to zero MAY be
included in a registration request message either during initial
registration or during a subsequent registration.
When a Mobile Router receives a registration reply, it MUST process
it as defined in Mobile IPv4 [RFC5944] and [RFC5177]. If one or more
network acknowledgement extensions are included with the Code field
set to "Success", the Mobile Router SHOULD treat the prefixes in the
corresponding Prefix fields as allocated prefixes and create the
appropriate bindings as defined in [RFC5177].
Tsirtsis, et al. Standards Track [Page 2]
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