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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 © 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 pidgeons.

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", 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

Full Copyright Statement
Copyright (C) The Internet Society (1999). All Rights Reserved.

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