From: Andy (and123and@googlemail.com)
Date: Wed Oct 04 2006 - 08:40:59 ART
Tc is configurable, default 125ms, how does Be work during these time slots.
Example 1 or 2.
Example1 default Tc
(1/8 Bc + Be) (2/8 Bc + Be).......(8/8 Bc + Be)
Example 2 default Tc
(1/8 Bc + Be) (2/8 Bc).........(8/8 Bc)
-A
On 04/10/06, Ivan <ivan@iip.net> wrote:
>
> In FRTS there is only one time interval Tc = CIR/BC. You suppose another
> one
> interval 1 sec. I don't know nothing about it.
> In my understanding FRTS have Bc size wich commit traffic at each
> interval.
> Once you have More than Bc traffic Be can be used. It does'n matter first,
> second or all interval Be will be used. It will be used until empty
> Be-bucket.
> Some document state about first interval, think they mean exceeded
> traffic
> above or equal Be+Bc per interval. If following traffic less Bc then Be
> token
> bucket will fill. Therefore get resources for exceeded traffic again.
> For example:
> Bc 12000 bit
> Be 4000 bit
>
> first Tc get 12kbit, Bc token bucket emptied in first interval, Be token
> bucket remain full.
> secont Tc get 15kbit, Bc - emptied, Be remain 1kbit (you can send up to
> 13kbit
> next time interval)
> thid Tc get 14kbit, Bc - emptied again, Be - emptied (such as only 1kbit
> was
> in token buket) and 1kbit will dropped.
> fourth Tc get 15kbit, Bc - emptied, Be - emptied
> fifth Tc get 11kbit, Bc- emptied, Be - remain 1kbit
> and so on.......
>
> Note: at the beginning each interval token bucket get 12kbit. Once Bc dont
> need all of this tokens it direct to the Be-bucket. Be-bucket therefor get
> resources for transmitting traffic.
>
> On Wednesday 04 October 2006 12:19, Andy wrote:
> > Hi
> >
> > Example 1
> > Most of the examples I am seeing as regards FRTS suggest that an excess
> > burst (Be) is sent out every Tc interval, ie if Tc is 100ms then
> > router can send Be during EACH 1/10th time interval.
> >
> > Example 2
> > Some of the material suggests that Be is only sending during the 1st Tc
> > interval. ie if Tc is 100ms then router can send Be during Tc = 1/10,
> > during Tc 2/10 to 10/10 the router is not allowed to use Be.
> >
> > Cisco info reads contradictory, some postings on GS favor example 1 over
> 2,
> > others 2 over 1.
> >
> > I am thinking it is Example 1 but there is just enough conflicting info
> out
> > there to make me question this.
> >
> > -A
> >
> > _______________________________________________________________________
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>
> --
> Ivan
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