Cell Relay Archive

[Walt Weber <waltweber@sprintmail.com>]

The switches I know of will not allow you to oversubscribe CBR.  On the other
hand, if there aren't any CBR cells being sent, VBR, ABR, and UBR can use the
bandwidth.



Yu Ning wrote:

> Hi friends,
>
> This is really an old topic, but i'm a little slow and can't catch up,:-)
>
> Can we over-subscribe CBR connection within a physical link? Heard some
> expert (from C&W) last night, that at the idle time when upper layer app
> don't generate data, so no cell will be send even in CBR conenction, then
> the idle time in the cell level will be used by other connection, such as
> UBR, ABR.  Is this a general practice by all the switch? Or it's only an
> advantage of certain switch ( more capabile and efficient switch)?
>
> Thanks definitely for your answer, or pointer to a previous discussion
> is also welcome. Thanks.
>
> Yu Ning.
> --
> ___________________________________________*
>
> Yu Ning
> ATM R&D Centre of
> BUPT (Beijing U. of Posts&Telecom)
> Beijing (ZIP:100876, MBox:147#), P.R.China
> Ideas ONLY reflect my own views,:-)
> ___________________________________________