From: Gregory Gombas (ggombas@gmail.com)
Date: Thu Oct 18 2007 - 22:27:05 ART
I didn't mean it literally, I just meant that since the packet will
always be exceeding bc it can never be sent...and thus dropped.
Only way to know for sure is to lab it up!
On 10/18/07, Eric Phillips <ephillips@squick.cc> wrote:
> Thanks everyone for the replies, I definitely appreciate it!
>
> I did skip a 0 there, sorry... I was aiming for a 10ms Tc to make VOIP
> traffic delayed as little as possible. So yes, the Bc would be 640 bits.
>
> Herbert, my numbers were referring to Shaping, so I was keeping everything
> in bits. With policing you deal in bytes.
>
> I am very intrigued to see that we have three answers, so perhaps I am not
> the only one that is a bit confused by this. If it is queued forever, does
> it block the pipe while it is queued?
>
> -Eric
>
>
>
> On 10/18/07, Gregory Gombas <ggombas@gmail.com> wrote:
> >
> > Even with shaping configured, if the router queues the packet then it
> > would be queued indefinately considering it will always be larger than
> > bc and never be able to send it...
> >
> > On 10/18/07, Herbert Maosa <asawilunda@googlemail.com> wrote:
> > > Eric,
> > >
> > > I assume you are maintaining bytes as the unit for Bc and ms as the unit
> > for
> > > TC ? In that case Bc of 64 Bytes and Tc of 10ms is giving me CIR =
> > 512Kbps,
> > > using the formula CIR = Bc/Tc.
> > >
> > > In any case, what will happen to a packet that is larger than the
> > maximum
> > > rate permitted will depend on whether you are shaping or policing. If
> > you
> > > are shaping, then the packet will simply be queued in the shaping queue
> > from
> > > which it will then be sent at CIR. If you are policing then it will
> > depend
> > > on the configured action for non-conforming traffic.
> > >
> > > Herbert.
> > >
> > >
> > > On 10/18/07, Eric Phillips <ephillips@squick.cc> wrote:
> > > >
> > > > Hi all,
> > > >
> > > > I have searched through the GroupStudy archives, read through Odem's
> > DQOS
> > > > book, and checked out the DOC CD, but have not found a clear answer to
> > a
> > > > question that has been on my mind.
> > > >
> > > > If I enable shaping with a very small Bc, for example, a Tc of 10, and
> > a
> > > > Bc
> > > > of 64, that should shape to 64kbit/sec, right? Now if I do not enable
> > > > link
> > > > fragmentation, and a large packet, perhaps 1400 bytes comes through,
> > what
> > > > will happen? It can not be sent in a single Tc, and it can not be
> > > > fragmented because link fragmentation is disabled. Also assume that I
> > > > have
> > > > no Be, or a Be too small to allow 1400 bytes to accumulate between Bc
> > and
> > > > Be.
> > > >
> > > > This seems like an awfully simple question, but I have not found a
> > clear
> > > > answer anywhere.
> > > >
> > > > Thank you very much,
> > > >
> > > > Eric
> > > >
> > > >
> > _______________________________________________________________________
> > > > Subscription information may be found at:
> > > > http://www.groupstudy.com/list/CCIELab.html
> > > >
> > >
> > >
> > >
> > > --
> > > Kindest regards,
> > > hm
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:16 ART