From: NET HE (he_net@hotmail.com)
Date: Tue Jan 20 2009 - 23:38:26 ARST
I agree with the first one, but the problem is that it is to tell downsteam
network device, no to the source to ask source slow down.
For second solution, since it is shape at 75%, there will be no congestion,
ECN will never come to play.Best Regards, Net (Xin) He > Date: Tue, 20 Jan
2009 19:12:34 +0400> Subject: Re: Policing or Shaping> From:
ccie.tobe81@gmail.com> To: slidersv@gmail.com> CC: he_net@hotmail.com;
sadiqtanko@gmail.com; ccielab@groupstudy.com> > So, after this discussion I
reached on the following solutions,> > police cir percent 75 conform-action
transmit exceed-action> set-frde-transmit using MQC> > OR> > shape average
percent 75 ( using MQC )> random-detect> random-detect ecn ( becasue FECN/BECN
not allowed )> > > HTH,> > On Tue, Jan 20, 2009 at 4:59 PM, Pavel Bykov
<slidersv@gmail.com> wrote:> > > Uh...> > Net He,> > that's not how interfaces
work.> > You cannot send at any other speed then the interface speed.
Interface can> > have either on or off state - don't forget that it's
digital.> > Check out chapter on test setup in the following document to
understand the> > need for queueing:> >
http://www.boxoid.org/cisco/MAX-RESERVED-BANDWIDTH-AND-CBWFQ.pdf> > 75%
utilization is counted using packets over time and with such high> >
utilization, there is 99% chance that router is queuing like crazy. The only>
> scenario this would not be true is if you had shapers in the path before or>
> if you'd use real time operating systems.> >> >> > Raul: Policing can
mark/remark packets that exceed rate, so policing with> > "set-de-transmit" as
exceed action could work for you. But to tell the other> > router what to
do... um... You could write a complecated EEM script. Or> > maybe just use
something like "frame-relay congestion threshold de 75"? Can> > you use
foresight messages?> > Telling othber routers what to do without FECN/BECN
could be complicated.> > You could tell end-hosts what to do, by dropping
packets...> >> >> >> >> > On Tue, Jan 20, 2009 at 3:12 AM, NET HE
<he_net@hotmail.com> wrote:> >> >> Since the condition is 70% utilization of
bandwidth, in other words, there> >> is no congestion. So congestion
management of using queues can't be used.> >> And congestion avoidance works
on queues instead of bandwidth utilization,> >> so congestion avoidance is not
an option either.> >>> >> Traffic shaping can't set bits to inform other
network nodes, so it is> >> excluded.> >>> >> Traffic policing can set bits
based on bandwidth utilization, but the bits> >> are to inform downstream
network instead of upstream network.> >>> >> Best Regards,> >> Net (Xin) He>
>>> >>> >>> >>> >> > Date: Mon, 19 Jan 2009 19:32:16 +0400> >> > Subject: Re:
Policing or Shaping> >> > From: ccie.tobe81@gmail.com> >> > To:
sadiqtanko@gmail.com> >> > CC: slidersv@gmail.com; ccielab@groupstudy.com> >>>
>> >> >> > Hi,> >> >> >> > Local router needs to inform remote router that
network is congested and> >> > remote router needs to slow down packet
forwarding once traffic> >> utilization> >> > on FR interface of local router
will reach 75%. Don't use FECN or BECN.> >> >> >> >> >> > HTH> >> >> >> > On
Mon, Jan 19, 2009 at 7:16 PM, Sadiq Yakasai <sadiqtanko@gmail.com>> >> wrote:>
>> >> >> > > Well, cos of "and we need to inform remote router that there is>
>> congestion> >> > > in network.", I would tend to think we need to inform
the remote> >> router that> >> > > there is congestion on the network, so that
an immediate action would> >> be> >> > > taken.> >> > >> >> > > I think there
isnt enough information from the question to provide an> >> > > exactly
solution.> >> > >> >> > > Anyways, just my 2 cents.> >> > >> >> > > Sadiq> >>
>> >> >> >> > Blogs and organic groups at http://www.ccie.net> >> >> >> >
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