Internet Draft R. Braden
Expiration: October 1999 ISI
File: draft-ietf-rsvp-iana-00.txt L. Zhang
UCLA
IANA Considerations for RSVP Version 1
April 20, 1999
Status of Memo
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Abstract
This document provides an IANA Considerations section that will be
included in a future revision of the RSVP (Resource Reservation
Protocol) specification, RFC 2205 [RSVP97]. Meanwhile, this document
should be used to perform protocol parameter assignment for the RSVP
protocol.
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1. Introduction
The responsible Internet authority (presently called the IANA) should
assign values to RSVP protocol parameters using rules presented in
this document, which uses the terminology of BCP 26 [Guide98].
The contents of this document will become the IANA Considerations
section in a future revision of the RSVP (Resource Reservation
Protocol) specification, RFC 2205 [RSVP97].
2. IANA Considerations
2.1 Message Type (or Msg Type)
Message Type is an 8-bit number that identifies the function of
the RSVP message. Its values fall into the following ranges:
0 Illegal value
1-127 Assigned by IANA with IETF Consensus.
128-191 Assigned by IANA using First-Come-First-Served
192-255 Private usage.
2.2 Class Number (or Class Num)
Class Number is an 8-bit number that identifies a class of data
objects to be carried in an RSVP message. Within each such class,
an 8-bit Class Type number (below) further specifies the
particular object type.
The two high-order bits of the Class Number are used to encode the
desired behavior when an RSVP implementation receives a message
containing an object whose Class Number it does not understand
[RFC2205]. In the following table: bits "x" are to be assigned by
the IANA. The bit "r" is currently required to have the value 1.
Class
Number Behavior Meaning
Range
________ ________ _____________________________________
0xxxxxxx REJECT RSVP rejects the RSVP message and
sends an RSVP error message.
10rxxxxx IGNORE RSVP silently ignores the object and
does not forward it.
11xxxxxx FORWARD RSVP silently ignores the object but
forwards it.
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Internet Draft RSVP IANA Considerations April 1999
The following table shows the behavior and IANA assignment rule
for each sub-range of the Class Number value:
0-80 REJECT; assigned by IANA with IETF Consensus.
81-127 REJECT; assigned by IANA using First-Come-First-Served
128-159 (Reserved)
160-191 IGNORE; assigned by IANA with IETF Consensus.
192-223 FORWARD; assigned by IANA with IETF Consensus.
224-255 FORWARD; assigned by IANA using First-Come-First-Served
2.3 Class Type
Class Type is an 8-bit number that is assigned distinctly for each
Class Number.
0 Illegal value
1-127 Assigned by IANA with IETF Consensus.
128-191 Assigned by IANA using First-Come-First-Served
192-255 Private usage.
2.4 Virtual Destination Port (vDstPort)
Virtual Destination Port is a 16-bit value number is used in
objects with the SESSION Class Number and the IPv4/GPI or IPv6/GPI
Class Type. Values of this quantity are assigned using the
following rules:
0 Illegal Value
1-10 Reserved. Contact authors of RFC 2207.
11-8191 Assigned by IANA using First-Come-First-Served.
8192-65535 Reserved for dynamic allocation.
For values assigned by IANA, the rules are those for UDP port
assignment: the requestor must provide (a) a Point of Contact, (b)
a brief description of the intended use, and (c) a short name to
be associated with the assignment.
2.5 Error Code
This 8-bit number indicates the basic type of error. New values
should be assigned using Expert Review. A document must be
submitted that defines the precise meaning of the error code and
the accompanying Error Value field.
2.6 Globally-Defined Error Value Sub-Code
These sub-codes form the low-order 12 bits of a 16-bit Error Value
of the form:
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Internet Draft RSVP IANA Considerations April 1999
0000xxxxxxxxxxxx
New sub-code values of this form should be assigned using Expert
Review [Guide98], and a document must be submitted that defines
their precise meaning. Currently assigned Error Code values
include the following for which additional globally defined error
value sub-codes may be defined:
o Error Code = 01: Admission control failure.
o Error Code = 12: Service preemption.
o Error Code = 21: Traffic control error.
In addition, new error codes may be defined in the future that
expand this list; they must be fully and explicitly documented.
3. References
[Guide98] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA
Considerations Section in an RFC", October 1998.
[RSVP97] Braden, R., Ed., Zhang, L., Berson, S., Herzog, S., and S.
Jamin, "Resource ReSerVation Protocol (RSVP) -- Version 1 Functional
Specification", RFC 2205, September 1997.
Security Considerations
The security considerations for RSVP are specified in [RSVP97].
Authors' Addresses
Bob Braden
USC Information Sciences Institute
4676 Admiralty Way
Marina del Rey, CA 90292
Phone: (310) 822-1511
EMail: Braden@ISI.EDU
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Internet Draft RSVP IANA Considerations April 1999
Lixia Zhang
Xerox Palo Alto Research Center
3333 Coyote Hill Road
Palo Alto, CA 94304
Phone: (415) 812-4415
EMail: Lixia@PARC.XEROX.COM
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