Marker PDU Aligned Framing for TCP Specification
RFC 5044
| Document | Type |
RFC - Proposed Standard
(October 2007; Errata)
Was draft-ietf-rddp-mpa (rddp WG)
|
|
|---|---|---|---|
| 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 5044 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Lars Eggert | ||
| Send notices to | (None) | ||
Network Working Group P. Culley
Request for Comments: 5044 Hewlett-Packard Company
Category: Standards Track U. Elzur
Broadcom Corporation
R. Recio
IBM Corporation
S. Bailey
Sandburst Corporation
J. Carrier
Cray Inc.
October 2007
Marker PDU Aligned Framing for TCP Specification
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.
Abstract
Marker PDU Aligned Framing (MPA) is designed to work as an
"adaptation layer" between TCP and the Direct Data Placement protocol
(DDP) as described in RFC 5041. It preserves the reliable, in-order
delivery of TCP, while adding the preservation of higher-level
protocol record boundaries that DDP requires. MPA is fully compliant
with applicable TCP RFCs and can be utilized with existing TCP
implementations. MPA also supports integrated implementations that
combine TCP, MPA and DDP to reduce buffering requirements in the
implementation and improve performance at the system level.
Culley, et al. Standards Track [Page 1]
RFC 5044 MPA Framing for TCP October 2007
Table of Contents
1. Introduction ....................................................4
1.1. Motivation .................................................4
1.2. Protocol Overview ..........................................5
2. Glossary ........................................................8
3. MPA's Interactions with DDP ....................................11
4. MPA Full Operation Phase .......................................13
4.1. FPDU Format ...............................................13
4.2. Marker Format .............................................14
4.3. MPA Markers ...............................................14
4.4. CRC Calculation ...........................................16
4.5. FPDU Size Considerations ..................................21
5. MPA's interactions with TCP ....................................22
5.1. MPA transmitters with a standard layered TCP ..............22
5.2. MPA receivers with a standard layered TCP .................23
6. MPA Receiver FPDU Identification ...............................24
7. Connection Semantics ...........................................24
7.1. Connection Setup ..........................................24
7.1.1. MPA Request and Reply Frame Format .................26
7.1.2. Connection Startup Rules ...........................28
7.1.3. Example Delayed Startup Sequence ...................30
7.1.4. Use of Private Data ................................33
7.1.4.1. Motivation ................................33
7.1.4.2. Example Immediate Startup Using
Private Data ..............................35
7.1.5. "Dual Stack" Implementations .......................37
7.2. Normal Connection Teardown ................................38
8. Error Semantics ................................................39
9. Security Considerations ........................................40
9.1. Protocol-Specific Security Considerations .................40
9.1.1. Spoofing ...........................................40
9.1.1.1. Impersonation .............................41
9.1.1.2. Stream Hijacking ..........................41
9.1.1.3. Man-in-the-Middle Attack ..................41
9.1.2. Eavesdropping ......................................42
9.2. Introduction to Security Options ..........................42
9.3. Using IPsec with MPA ......................................43
9.4. Requirements for IPsec Encapsulation of MPA/DDP ...........43
10. IANA Considerations ...........................................44
Appendix A. Optimized MPA-Aware TCP Implementations ...............45
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