[kwlug-disc] [OT] QOS router

[Bob Jonkman]

On 10-11-01 11:19 AM, Jeff Welling wrote:

> QoS is a way of classifying packets, commonly done by looking at the
> DiffServ/TOS field in IP packets and grouping them together into
> different classes of service.  Packets are then pulled from the
> highest priority queue and are sent out over the line until that
> queue is empty, at which point it moves on to the next highest
> priority queue and repeats until the outbound speed limit is met or
> it runs out of packets to send.


I don't think it can be that simple.  If so, any incoming traffic on 
Queue 1 would block all traffic in lower queues.

Another queue algorithm I'm familiar with (GW e-mail priority queues) 
pulls stuff out of queues in the following order: 1, 1 2, 1 2 3, 1 2 3 
4, 1, 1 2, 1 2 3, 1 2 3 4 (but for 8 queues).  This way queue 1 gets 
serviced most frequently, but queue 4 (or queue 8) doesn't stagnate 
completely.

--Bob.


Bob Jonkman<bjonkman at sobac.com>          http://sobac.com/sobac/
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