RFC 2549 (rfc2549) - Page 2 of 6

IP over Avian Carriers with Quality of Service

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RFC 2549            IP over Avian Carriers with QoS         1 April 1999


   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.




Waitzman                      Experimental</____>
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