Hi all,
I am having a strange problem with NetBIOS shares between XP Pro
machines on a wireless LAN.
I have 2 desktops and 1 portable all running XP Pro SP1. The LAN
equipment is all Netgear: a WGT624 gateway router, a WGE101 bridge and
a WG511T PCMCIA card - all 54g with the latest firmware and/or
drivers.
The bridge firmware does not support configuration of either
fragmentation or RTS/CTS, so the router and PCMCIA card both have
these options set to the default, maximum values (2346 bytes).
Desktop A is wired to the router, desktop B is wired to the bridge.
Signal strength between the router and bridge is 90+ all the time.
Signal strength between the router and the portable varies but is 75+
where I use it mostly and about 60 in the same room as the bridge.
The router provides DHCP. XP's computer browser service provides
local name resolution. 128 bit WEP is enabled and the SSID is not
broadcast. The portable has WZC disabled and the card is configured
via Netgear's setup utility.
All machines have NetBIOS over TCP and simple sharing enabled. I use
AVG 6 antivirus ZoneAlarm Pro 4 in lieu of ICF. Each machine shares a
folder to the LAN and the desktops each share a laser printer as well.
Nothing is shared to the Internet.
The symptoms are as follows:
Desktop B and the portable can wirelessly access the Internet
simultaneously at acceptable speeds and interfere with each other
fairly predictably. It appears that they are sharing bandwidth pretty
well.
Browsing and file transfers between desktops A and B go full blast in
either direction. I can get better than 48Mbps directionally when the
portable is idle. Each can access the other's printer.
Between desktop A and the portable performance is equally good - but
only in one direction: portable ==> desktop. I can browse the
portable's shares from the desktop, copy files from the portable to
the desktop and print from the portable. Remote printing from the
portable seems a bit slow but otherwise works fine. File copying can
be initiated from either side as long as the result is a portable ==>
desktop transfer. However, in the reverse direction throughput is
pitiful. Browsing or transferring files is very slow when it works -
I have measured 10..30Kbps and operations frequently fail for no
apparent reason.
Desktop B and the portable are not on speaking terms - they barely
acknowledge each other's existence. Browsing is stupifyingly slow in
either direction, remote printing from the portable does not work and
file transfers between them are all but impossible - when it works at
all I have measured the throughput at less than 1Kbps.
Symmetric wireless access to all machines would be nice but I can live
without it if I can get the portable to make nice with the router's
wired desktop. Any thoughts as to how I might do that?
Thanks,
George
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