From: Carlos Trujillo (carlos.trujillo.jimenez@gmail.com)
Date: Mon May 05 2008 - 10:26:29 ART
For tail drop:
When the queue lenght of the class you created becomes full, every single
packet entering becomes dropped, and as a result, there appears the Global
Synchronization. (all network slows down due to dropped tcp connections).
For Random Drop (in Cisco Weighted Rando Drop):
Cisco only supports Weighted Random Detection, It means that when enabled in
a class, and there is congestion, the packets from a single class get
dropped more aggresively than packets from another class. The decission of
dropping what packets in relation to others is evaluating the weight
(precedence by default), for example, a low precedence packets gets more
chances to become dropped than a high precedence packet, when there is
congestion.
2008/5/5, raul raul <juvenn@hotmail.com>:
>
> hi ;
>
> when the queue is full how this tail drop works ?
>
> 5->4->3->2->1 ----queue full-----
>
>
> is it the packet will drop randomly or from 5->4->3->2-1 ?
>
> thanks
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