Re: Question on Software and hardware queue

Software queues can be be FIFO per class, or can be WFQ.

There is a tx ring per interface, and once the packet makes it onto the ring
FIFO rules are used.

There is also an input buffer, and on some platforms like the 3560 can be
tuned.(SRR)
On Jul 26, 2011 11:34 AM, "Nick Jay" <wanttobeccde_at_yahoo.com> wrote:
>
> Hi All,
>
> I am trying to understand the difference between the terms
> software
> queue
> hardware queue
> ingress queue
> egress queue
>
> So far my understanding
> says:
> * When no congestion, the packets are directly copied into the hardware
> queue in a FIFO manner without taking it through the software queue. Only
FIFO
> is possible in hardware queue and there is only 1 hardware queue. (Is this
> correct?)
> * Software queue are defined as per the number of classes you define
> manually. Are ingress queue and software queue one and the same?
> * Each
> physical port have a set of tx and rx queues depnding on the platform they
> could be 2Q2T or 1P2Q2T. Are these ingress and egress queues?
> * Is egress and
> hardware queue one and the same? I think they are not then what is the
> difference?
>
> Can anyone help me to understand the clear distinction between
> these terms or please share a link which can clearly show the queue
> architecture?
>
>
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Received on Tue Jul 26 2011 - 18:30:31 ART