From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Tue Aug 31 2004 - 06:50:52 GMT-3
Jonathan,
without traffic-shapping in the interface, the router will send as much
as it can as soon as it has it, up to AR (access rate, default T1).
Once you set traffic-shapping, a two stage queueing starts. The first
(in the order of data flow) is a per PVC shapping queue that defaults to
56k rate, and the second is a FIFO "merging queue".
If you only have one PVC, then you'd better tune the first stage queue.
First stage can be converted into a full blown CBWFQ + FRTS queue.
(Actually one per PVC)
Second stage can be converted into dual FIFOs by adding "frame ragment"
to any PVC queue, in which case all priority queues traffic goes to one
of the (parallel) second stage queues (priority) and the rest of the
traffic goes to the other.
Jonathan R. Charles wrote:
> What is the default behavior without FRTS configured on a router?
>
>
>
> For example, let's say you have a DS-1, and a CIR of 256K, how will the
> router transmit data (IOW, what are the defaults) if there is no FRTS
> configured on the router? Will the router blast away at 1536kbps (with your
> frame switch probably setting DE on everything above 256kbps) or will it
> default to something else?
>
>
>
> If you do not configure CIR, minCIR, BC, BE et al, what happens?
>
>
>
> I read on the router ( cir Committed Information Rate (CIR),
> Default = 56000 bps) that the default was a CIR of 56K, is this true? Is
> this applied even if there is no map-class frame-relay configured and
> applied to the interface?
>
>
>
> Also, on Cisco's web site, it says that the CIR is actually the access-rate,
> while minCIR is the CIR you are actually paying for.
>
>
>
> Can anyone clarify?
>
>
>
>
>
>
>
>
>
> Jonathan
>
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-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
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