Synopsis
--------
Very strange networking problem that would seem to be with the
motherboard (process of elimination) but doesn't seem possible as the
type of error that a motherboard *could* cause.
A particular system, connected to an established network, cannot see a
particular device (the router) no matter what adapter, OS, or settings
I use. Whilst I can access every other machine on the LAN I cannot
even ping the router or access the Internet.
Description
-----------
I've built a new system around an Abit IC7 Motherboard (P4 2.4GHz with
Hyperthreading, 2x256MB DDR400 Corsair RAM, 120GB SATA, Radeon
9600Pro, Liteon DVD/CD-RW & Sony DVD-RW). Aside from the DVD rewriter
& motherboard I pulled all of the parts from a working Shuttle SN61G2
(didn't like the noise levels) so I'm pretty confident about most of
these components. [System T]
I've had a home network established (mix of wired ethernet and 802.11b
wireless) for over a year. Broadband enabled router (D-Link DSL504)
wired to a Win 2003 Server [System S], a Win 2000 Advanced Server
Laptop [System L1] and a wireless access point (D-Link DWL-900AP+)
which provides network coverage for two more systems; a Win2k Pro
machine with a D-Link DWL-520 PCI Adapter [System D] and another Win2k
Pro machine with a D-Link DWL-650 PCMCIA Adapter [System L2]. All
machines are configured with static ip addresses.
Due to the location of this new system I knew from previously mapping
out signal coverage that a USB wireless adapter would offer me the
opportunity to achieve about 80-90% signal strength with a relatively
short cable (2 feet). I now get the following problem when using one:
I can ping every machine on the LAN *apart* from the router; I cannot
ping anything outside the LAN (i.e. on the Internet). Signal strength
is fine, I can ftp the other machines and download/upload at a good
rate of knots. When I ping the router I get 'Request Timed Out'.
I have already tried the following:
* Two different usb adapters (a Netgear MA111 & a Linksys WUSB11).
* Two different OS' (WinXP Pro with and without SP1, Win2k Pro with
SP3 and with SP4) and both adapters with each setup. NB: These were
completely fresh installations with just drivers installed, no extra
software.
* Disabling firewalls on every computer in the network and on the
router itself.
* Changing the ip address of the router.
* Changing the ip address I assign to the system (all in the range
192.168.0.x with subnet 255.255.255.0 - same as the other machines).
The DNS server addresses are set to those of my ISP, same as for every
other system.
* Changing the adapter settings to obtain ip address automatically and
enabled DHCP on the router.
* Flashing the motherboard BIOS to most recent version (little
disapointed that my brand new motherboard came with a year out of date
BIOS but thats not the issue).
* Changing BIOS settings to 'Fail Safe Defaults' then disabling
practically everything I didn't need (firewire, serial, USB2, sound).
* Trying the usb adapters on another system (they worked fine).
I'm not a network expert, not really that great with hardware either
but I've always managed to fix my problems before. My instinct is
pushing me towards a motherboard problem through process of
elimination but why? It doesn't make anysort of sense to me that it
could stop my network connection from 'seeing' a specific device
regardless of what ip address I assign to it.
I appologise for cross-posting this to a couple of newsgroups but I
can't narrow down exactly where to look for help. I will, of course,
be posting a full solution in the (increasingly) unlikely event that I
get this solved.
Tintax
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