Re: Policing in one class with LLQ

Hi Dennis

Yes you can, and as advised, you need to, if you wish the LLQ class to be
policed at all times.
The internal policer is only applied during congestion conditions.
(Pretty much reiterating what is being said :) ).
NB. LLQ class Traffic exceeding the value specified in the priority
statement when congestion is not in play gets put into class-default, & is
not priority "queued". As such, having the police statement as well the
priority is generally seen as a good idea if you want all your LLQ class
traffic to be priority "queued".

Regards
Roy

On 17 February 2010 05:58, CCIE-Newbie <ccie_ka_at_gmx.de> wrote:

> Hi,
> thanks to all for the advice...
>
> So if I understand it right...there is an internal policer..._but_ I can
> also configure my own police command inside the LLQ class ?!
>
> Dennis
>
> Am Dienstag, den 16.02.2010, 20:22 +1100 schrieb Dale Shaw:
> > Hi Jared,
> >
> > On Tue, Feb 16, 2010 at 7:09 PM, Jared Scrivener
> > <lists_at_jaredscrivener.com> wrote:
> > >
> > > Unlike the bandwidth command, the priority command has an internal
> > > policer stopping it from using up excess bandwidth on the link. The
> > > example you describe is normally seen in accompaniment to the
> > > bandwidth command, I believe.
> >
> > Deja vu?
> >
> > http://www.groupstudy.com/archives/ccielab/200911/msg01728.html
> >
> > :-)
> >
> > See the "Which Traffic Classes Can Use Excess Bandwidth?" section of
> > this document:
> >
> http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a0080103eae.shtml
> >
> > "The queueing system imposes an important exception to this rule with
> > a priority class. [...] the offered load of a priority class is
> > metered by a traffic policer. During congestion conditions, a priority
> > class cannot use any excess bandwidth."
> >
> > "[...] it is important to understand that since the priority classes
> > are policed during congestion conditions, they are not allocated any
> > remaining bandwidth from the bandwidth classes. Thus, remaining
> > bandwidth is shared by all bandwidth classes and class-default."
> >
> > "If a bandwidth or priority class should not exceed its allocated
> > bandwidth during periods of no congestion, you can combine the
> > priority command with the police command. This configuration imposes a
> > maximum rate that is always active on the class."
> >
> > cheers,
> > Dale
> >
> >
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-- 
Regards
Roy
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