Transmission of IP over InfiniBand (IPoIB)
RFC 4391
| Document | Type |
RFC - Proposed Standard
(April 2006; No errata)
Updated by RFC 8064
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4391 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Margaret Cullen | ||
| Send notices to | (None) | ||
Network Working Group J. Chu
Request for Comments: 4391 Sun Microsystems
Category: Standards Track V. Kashyap
IBM
April 2006
Transmission of IP over InfiniBand (IPoIB)
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2006).
Abstract
This document specifies a method for encapsulating and transmitting
IPv4/IPv6 and Address Resolution Protocol (ARP) packets over
InfiniBand (IB). It describes the link-layer address to be used when
resolving the IP addresses in IP over InfiniBand (IPoIB) subnets.
The document also describes the mapping from IP multicast addresses
to InfiniBand multicast addresses. In addition, this document
defines the setup and configuration of IPoIB links.
Table of Contents
1. Introduction ....................................................2
2. IP over UD Mode .................................................2
3. InfiniBand Datalink .............................................3
4. Multicast Mapping ...............................................3
4.1. Broadcast-GID Parameters ...................................5
5. Setting Up an IPoIB Link ........................................6
6. Frame Format ....................................................6
7. Maximum Transmission Unit .......................................8
8. IPv6 Stateless Autoconfiguration ................................8
8.1. IPv6 Link-Local Address ....................................9
9. Address Mapping - Unicast .......................................9
9.1. Link Information ...........................................9
9.1.1. Link-Layer Address/Hardware Address ................11
9.1.2. Auxiliary Link Information .........................12
Chu & Kashyap Standards Track [Page 1]
RFC 4391 IP over InfiniBand (IPoIB) April 2006
9.2. Address Resolution in IPv4 Subnets ........................13
9.3. Address Resolution in IPv6 Subnets ........................14
9.4. Cautionary Note on QPN Caching ............................14
10. Sending and Receiving IP Multicast Packets ....................14
11. IP Multicast Routing ..........................................16
12. New Types of Vulnerability in IB Multicast ....................17
13. Security Considerations .......................................17
14. IANA Considerations ...........................................18
15. Acknowledgements ..............................................18
16. References ....................................................18
16.1. Normative References .....................................18
16.2. Informative References ...................................19
1. Introduction
The InfiniBand specification [IBTA] can be found at
http://www.infinibandta.org. The document [RFC4392] provides a short
overview of InfiniBand architecture (IBA) along with considerations
for specifying IP over InfiniBand networks.
IBA defines multiple modes of transport over which IP may be
implemented. The Unreliable Datagram (UD) transport mode best
matches the needs of IP and the need for universality as described in
[RFC4392].
This document specifies IPoIB over IB's UD mode. The implementation
of IP subnets over IB's other transport mechanisms is out of scope of
this document.
This document describes the necessary steps required in order to lay
out an IP network on top of an IB network. It describes all the
elements of an IPoIB link, how to configure its associated
attributes, and how to set up basic broadcast and multicast services
for it.
It further describes IP address resolution and the encapsulation of
IP and Address Resolution Protocol (ARP) packets in InfiniBand frame.
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].
2. IP over UD Mode
The unreliable datagram mode of communication is supported by all IB
elements be they IB routers, Host Channel Adapters (HCAs), or Target
Channel Adapters (TCAs). In addition to being the only universal
transmission method, it supports multicasting, partitioning, and a
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