ok. .... and so no other potential clients (yours or anyone elses)
_attempting_ to negotiate an association with your AP (and so missing your
packets) or another AP on the same channel far away ?
I've just read that rts stops transmissions from all nodes on the same
physical channel even if they're on a different network - makes sense I
guess. I was wondering if there could be a distant high power AP on same
channel invoking rts which is telling your ABO to shut up on occasions.
That would be difficult to find as you might not be able to see it easily
(poss displayed in "Select from Available Access Points" on Site Survey tab?
netstumbler ?). How you stop it if that is the case I wouldn't know -
directional narrow beam aerials I guess - but you've already got that.
Tricky.
Maybe its not a case of lowering the o/p power (was it you trying that?) but
reducing antenna gain to lose unwanted cts on rx side ? This is getting
heavy !!! must be simpler than this ......
clutching at straws....
Just looking back (are there 2 Scotts on this thread ?) I think I might be
confusing two different systems/problems. On the first I see "Network has
RTS on all other devices pointed at that AP at 128" - Strikes me this
might be the issue there - I wonder how the "bad" client behaves if rts is
lifted from its other neighbours ?
----- Original Message -----
From: "Scott" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 26, 2003 7:13 PM
Subject: Re: [smartBridges] upload vs download
> No, this is different. This is point to point, both ends with directional
> antennas and only one ABO connecting to APP.
>
> Scott
>
>
> > Scott,
> > Isn't this exactly what we are talking about on the other thread ?
> >
> > For this discussion AP = Access Point rather than APO etc
> >
> > AP > client
> > Your client does not hear many other client transmissions cos its got
> > directional antenna pointing towards AP, or not many clients nearby etc.
> So
> > when AP transmits, it can hear it no probs, no retries. Good bandwidth
> >
> > Client > AP
> > AP hears all the clients - thats its job. When your client transmits it
> > doesn't know that others are also transmitting to it ("hidden nodes" as
> far
> > as your client is concerned), the AP does not ACK. the packet is
retried.
> > Poor bandwidth due to retries.
> >
> > Suggest you check retied packet stats at the client. Does reducing the
> > value of RTS help ? Say to 200 ? Need to find the balance possibly
> >
> >
> > ----- Original Message -----
> > From: "Scott" <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Wednesday, November 26, 2003 5:22 PM
> > Subject: Re: [smartBridges] upload vs download
> >
> >
> > > I really hate "me too" emails but we've experienced the exact same
> > > behaviour. I'm wondering how many people have witnessed this
happening.
> > > This is an ABO to AP link and SimpleNMS shows the following:
> > >
> > > The AP client table shows RSSI 92% -17dbm and a link quality of
> 90%
> > > The ABO statistics show RSSI 60% -42dbm and link quality 72%
> > >
> > > If I understand this properly you would _think_ that you would get
> higher
> > > bandwidth from the ABO to the AP (am I right here theoretically ?) but
> > this
> > > is exactly the opposite.
> > >
> > > This is a 14 mile link which is very stable. From the ABO, download
is
> > over
> > > 1Mbps but upload is probably 250kbps.
> > >
> > > Running 1.4j.6 and 0.01.08
> > >
> > > Scott
> > >
> > >
> > > > I have seen this also in some cases so you are not alone. Anyone
with
> a
> > > > clue as to what is happening here?
> > > >
> > > > -----Original Message-----
> > > > From: [EMAIL PROTECTED]
> > > > [mailto:[EMAIL PROTECTED] Behalf Of shoffman
> > > > Sent: Tuesday, November 25, 2003 6:43 PM
> > > > To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> > > > Subject: [smartBridges] upload vs download
> > > >
> > > >
> > > > Hi all,
> > > >
> > > > Know this has been discussed several times.. hate to repeat an old
> > topic.
> > > >
> > > > Here is scenario:
> > > >
> > > > Customer has ABTotal. RSSI 75%, Link quality 95% on its reading.
> Long
> > > > Preamble, 5 MBps auto (also tried at 11 Mbps auto).
> > > >
> > > > Frag set at two different levels: 512 and 2336 (off)
> > > > RTS set at two different levels (4combos in all): 128 and 2337 (off)
> > > >
> > > > Ethernet card at 10 - 1/2 duplex
> > > >
> > > > AP is Cisco 350 - RTS Off, Frag 2336. Signal Strength at 50%.
> > > >
> > > > In all cases: Download 600-800 kbps, upload (best with RTS off) 36
> kbps,
> > > > with RTS 8 kbps.
> > > >
> > > > Network has RTS on all other devices pointed at that AP at 128.
> > > >
> > > > So... thoughts? We are going to re-terminate...go with an outdoor
and
> > > > parabolic.. But is this interfernce? SB device see no other
signal,
> > > > have not sent out an SA yet. All other clients are doing pretty
good
> on
> > > > this network. We will send an SA out to be sure, but still.....
> > > >
> > > >
> > > > Thoughts
> > > >
> > > > Scott
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