Network Working Group D. Waitzman
Request for Comments: 2549 IronBridge Networks
Updates: 1149 1 April 1999
Category: Experimental
IP over Avian Carriers with Quality of Service
Status of this Memo
This memo defines an Experimental Protocol for the Internet
community. It does not specify an Internet standard of any kind.
Discussion and suggestions for improvement are requested.
Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (1999). All Rights Reserved.
Abstract
This memo amends RFC 1149, “A Standard for the Transmission of IP
Datagrams on Avian Carriers”, with Quality of Service information.
This is an experimental, not recommended standard.
Overview and Rational
The following quality of service levels are available: Concorde,
First, Business, and Coach. Concorde class offers expedited data
delivery. One major benefit to using Avian Carriers is that this is
the only networking technology that earns frequent flyer miles, plus
the Concorde and First classes of service earn 50% bonus miles per
packet. Ostriches are an alternate carrier that have much greater
bulk transfer capability but provide slower delivery, and require the
use of bridges between domains.
The service level is indicated on a per-carrier basis by bar-code
markings on the wing. One implementation strategy is for a bar-code
reader to scan each carrier as it enters the router and then enqueue
it in the proper queue, gated to prevent exit until the proper time.
The carriers may sleep while enqueued.
For secure networks, carriers may have classes Prime or Choice.
Prime carriers are self-keying when using public key encryption.
Some distributors have been known to falsely classify Choice carriers
as Prime.
Packets MAY be marked for deletion using RED paint while enqueued.
Weighted fair queueing (WFQ) MAY be implemented using scales, as
shown:
__
_____/—–\ / o\
<____ _____\_/ >–
+—–+ \ / /______/
| 10g | /|:||/
+—–+ /____/|
| 10g | |
+—–+ .. X
===============================
^
|
=========
Carriers in the queue too long may leave log entries, as shown on the
scale.
The following is a plot of traffic shaping, from coop-erative host
sites.
Alt | Plot of Traffic Shaping showing carriers in flight
|
2k | ………………..
| . .
| . .
1k | . .
| +—+ +—+
| | A | | B |
| +—+ +—+
|_____________________________________________
Avian carriers normally bypass bridges and tunnels but will seek out
worm hole tunnels. When carrying web traffic, the carriers may
digest the spiders, leaving behind a more compact representation.
The carriers may be confused by mirrors.
Round-robin queueing is not recommended. Robins make for well-tuned
networks but do not support the necessary auto-homing feature.
A BOF was held at the last IETF but only Avian Carriers were allowed
entry, so we don’t know the results other than we’re sure they think
MPLS is great. Our attempts at attaching labels to the carriers have
been met with resistance.
NATs are not recommended either — as with many protocols, modifying
the brain-embedded IP addresses is difficult, plus Avian Carriers MAY
eat the NATs.
Encapsulation may be done with saran wrappers. Unintentional
encapsulation in hawks has been known to occur, with decapsulation
being messy and the packets mangled.
Loose source routes are a viable evolutionary alternative enhanced
standards-based MSWindows-compliant technology, but strict source
routes MUST NOT be used, as they are a choke-point.
The ITU has offered the IETF formal alignment with its corresponding
technology, Penguins, but that won’t fly.
Multicasting is supported, but requires the implementation of a clone
device. Carriers may be lost if they are based on a tree as it is
being pruned. The carriers propagate via an inheritance tree. The
carriers have an average TTL of 15 years, so their use in expanding
ring searches is limited.
Additional quality of service discussion can be found in a Michelin’s
guide.
MIB and Management issues
AvCarrier2 OBJECT-TYPE
SYNTAX SEQUENCE OF DNA
MAX-ACCESS can’t-read
STATUS living
DESCRIPTION “Definition of an avian carrier”
::= { life eukaryotes mitochondrial_eukaryotes crown_eukaryotes
metazoa chordata craniata vertebrata gnathostomata
sarcopterygii terrestrial_vertebrates amniota diapsida
archosauromorpha archosauria dinosauria aves neornithes
columbiformes columbidae columba livia }
AvCarrier OBJECT-TYPE
SYNTAX SET OF Cells
MAX-ACCESS not-accessible
STATUS obsolete
DESCRIPTION “Definition of an avian carrier”
::= { life animalia chordata vertebrata aves
columbiformes columbidae columba livia }
PulseRate OBJECT-TYPE
SYNTAX Gauge(0..300)
MAX-ACCESS read-only
STATUS current
DESCRIPTION “Pulse rate of carrier, as measured in neck.
Frequent sampling is disruptive to operations.”
::= { AvCarrier 1}
The carriers will not line up in lexigraphic order but will
naturally order in a large V shape. Bulk retrieval is possible
using the Powerful Get-Net operator.
Specification of Requirements
In this document, several words are used to signify the requirements
of the specification. These words are often capitalized.
MUST Usually.
MUST NOT Usually not.
SHOULD Only when Marketing insists.
MAY Only if it doesn’t cost extra.
Security Considerations
There are privacy issues with stool pigeons.
Agoraphobic carriers are very insecure in operation.
Patent Considerations
There is ongoing litigation about which is the prior art: carrier or
egg.
References
Waitzman, D., “A Standard for the Transmission of IP Datagrams on
Avian Carriers”, RFC 1149, 1 April 1990.
ACKnowledgments
Jim.Carlson.Ibnets.com > Jon.Saperia . ack 32 win 123 (DF)
Ross Callon, Scott Bradner, Charlie Lynn …
Author’s Address
David Waitzman
IronBridge Networks
55 Hayden Ave
Lexington, MA 02421
Phone: (781) 372-8161
EMail: djw@vineyard.net
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Source : http://www.faqs.org/rfcs/rfc2549.html
