Turbocell station entries
Dan Metcalf
Wireless Broadband Systems
http://www.wbsysnet.com/
877-685-0578
dan.metcalf@wbsysnet.com
> -----Original Message-----
> From: karlnet-admin@WISPNotes.com [mailto:karlnet-admin@WISPNotes.com]
On
> Behalf Of Bob Hrbek
> Sent: Thursday, December 12, 2002 9:26 AM
> To: karlnet@WISPNotes.com
> Subject: Re: [Karlnet] Strange retransmit problem
>
> where are you seeing "re-transmits"? I don't see them in any of the
> statistics pages.
>
> -bob
> ----- Original Message -----
> From: "Dan Metcalf" <dan.metcalf@wbsysnet.com>
> To: <karlnet@WISPNotes.com>
> Sent: Thursday, December 12, 2002 8:22 AM
> Subject: RE: [Karlnet] Strange retransmit problem
>
>
> > I now see this after upgrading one of our wavepoint II (bnc
connector)
> > to v4.31, on its "backhaul" link
> >
> > Dan Metcalf
> > Wireless Broadband Systems
> > http://www.wbsysnet.com/
> > 877-685-0578
> > dan.metcalf@wbsysnet.com
> >
> >
> > > -----Original Message-----
> > > From: karlnet-admin@WISPNotes.com
[mailto:karlnet-admin@WISPNotes.com]
> > On
> > > Behalf Of Kevin Knuth
> > > Sent: Wednesday, December 11, 2002 7:34 PM
> > > To: karlnet@WISPNotes.com
> > > Subject: RE: [Karlnet] Strange retransmit problem
> > >
> > > Chris,
> > >
> > > Who have you been dealing with in our office?
> > >
> > > Kevin
> > > ____________________________________
> > > Kevin R. Knuth
> > > Business Development Manager
> > > North America
> > > Corporate Office: 614-822-5275 x130
> > > Home Office: 260-424-9690
> > > Cell Phone: 260-402-6086
> > > Email: kknuth@karlnet.com
> > > www.karlnet.com
> > > ____________________________________
> > >
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> > > please notify us immediately and erase all copies of the message
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> > > attachments. Thank you.
> > >
> > > -----Original Message-----
> > > From: karlnet-admin@WISPNotes.com
> > [mailto:karlnet-admin@WISPNotes.com]On
> > > Behalf Of Chris Conn
> > > Sent: Wednesday, December 11, 2002 5:37 PM
> > > To: karlnet@WISPNotes.com
> > > Subject: [Karlnet] Strange retransmit problem
> > >
> > >
> > > Hello to all,
> > >
> > >
> > > I have been having a strange problem for quite a while. I have
spoken
> > > to Karlnet about this and they told me it was a rare occurrence
and
> > > _maybe_ one other customer was seeing this but all data was
> > inconclusive.
> > >
> > > The problem:
> > >
> > > A situation can arise intermittently (once a week, once a month,
three
> > > times a day, no real pattern) where in a multi-point antenna, the
base
> > > station will enter a mode where it is retransmitting thousands and
> > > thousands of packets to a satellite. The transmit counter does
not
> > > increase, only the re-transmit counter, and by the thousands at a
> > time.
> > > Upon looking at the Turbocell station entries, we notice that
the
> > > transmit and retransmit counters seem to have reset back to zero
for
> > the
> > > satellite to which it is retransmitting, and you can watch the
> > > re-transmit counters increase at an alarming rate. All other
> > satellites
> > > are still visible, however no TCP/IP data can pass to any
satellite,
> > > including the one to which the retransmits are occurring.
Therefore,
> > > the whole system is no longer useable. The amount of throughput
> > before
> > > or after can be high or low, it does not matter. This will happen
day
> > > or night, with or without customer usage. After a few minutes (2
to
> > 5),
> > > the whole thing comes back online and data starts to pass again.
It
> > > would seem that the base station jams on one satellite which no
longer
> > > can acknowledge a transmission for some reason.
> > >
> > > We have tried changing all hardware, using flashroms, AP1000s, new
> > > antennas. In no case are we using amplification of any kind. We
also
> > > tried replacing the radio card in the base to a PRISM 2.5 200mW,
and
> > > were initially happy however the problem eventually happened
therefore
> > > it is not a radio firmware issue (since it is not Orinocco
specific),
> > > and looks to be a software issue.
> > >
> > > The Workaround:
> > >
> > > We have found that setting the base from 11Mbps to 5.5Mbps will
fix
> > the
> > > problem in 3 out of the 4 setups that are doing this. However, in
one
> > > case we had to set a customer satellite all the way down to 1Mb in
> > order
> > > to cease totally any form of this problem. But, we obviously take
a
> > > performance drop in the process.
> > >
> > > Other info:
> > >
> > > All bases are running 4.31, and the clients are running a mix of
3.88
> > > and 4.02. I assume however that it has to do with the base since
it
> > is
> > > my understanding that polling should occur many times per second
to
> > each
> > > satellite and during these periods, several minutes go by before
any
> > > satellite is polled other than the one the base seems to get stuck
on.
> > >
> > > Any ideas?
> > >
> > > Thanks,
> > >
> > > Chris
> > >
> > > _______________________________________________
> > > Karlnet mailing list
> > > Karlnet@WISPNotes.com
> > > http://lists.wispnotes.com/mailman/listinfo/karlnet
> > > _______________________________________________
> > > Karlnet mailing list
> > > Karlnet@WISPNotes.com
> > > http://lists.wispnotes.com/mailman/listinfo/karlnet
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