On Sat, 24 Apr 1999, Tomi Manninen wrote:
> On Sat, 24 Apr 1999, Jorge Matias wrote:
>
> > On Fri, 23 Apr 1999, Riley Williams wrote:
> >
> > > Hi Jorge.
> > >
> > > >>> Why does the modem takes so long to transmit when I make a Ping,
> > > >>> Telnet, Ftp, etc? It doesn`t tramsmit right after issuing the
> > > >>> command.
> > >
> > > > Possably your system is trying to do a DNS lookup to resolve the
> > > > hostname of the target address, is there any difference in speed
> > > > by doing ping 44.xx.xx.xx in stead of ping ct1abc ??
> > >
> > > > I don't have problems with DNS lookups because I have the
> > > > machines in my /etc/hosts.
> > >
> > > That doesn't automatically follow - I had precicely that problem with
> > > one of my systems a while back, where I had an entry in /etc/hosts but
> > > still couldn't telnet to the host.
> >
> > But the problem is not there. I do a PING with an IP address and still
> > big delays to transmit. I do PING with 5 secs interval. It never sends the
> > Ping every 5 secs. Sometimes it only transmits a block of 3 frames after
> > 15-20secs.
>
> That would seem to be a channel access problem. Maybe DCD stays on for
> some reason? What about persistence and slottime? Too small persistence
> value or too long slottime could cause that. I don't know how you set
> those on an YAM modem however... :(
I have persistence = 64 and slottime = 200ms.
I read a message that syays YAM driver has a problem. It understands
units of slottime as 1/10 of second which means that before I had 2secs of
slottime.
Anyway, probably I still have a problem with DCD.
Regards,
Jorge Matias
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Computer Science Student at Instituto Superior Tecnico (Lisbon)
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