Strange connectivity issue

[JohnB]

Windows XP SP3, Dell laptop. Cannot ping the default gateway, which is our
router. Can ping any other computers on the subnet, either by hostname or
IP. Other computers on the subnet can ping this laptop, either by IP or
hostname.

Cannot ping the laptop from the router.

The laptop has built-in wireless. If I enable that, I can ping the router's
IP address.

I tried resetting TCPIP with this command:
Netsh int ip reset
Didn't help.

Windows firewall is disabled.
The computer does not appear to have any viruses.
Nothing in Event Viewer.

I'm stumped. Any ideas?


Thanks.

 

[JohnB]

I got it fixed.
I changed to static IP, to a different address than what had been given from
DHCP, and I could ping the gateway.

I changed it back to DHCP and it didnt' work again. Changed it back to
static, deleted the lease in DHCP for the address that it was giving out for
this laptop, and re-enabled DHCP on the laptop, and it works.

Don't know why the first address all of the sudden would not work. It is
not in use by another machine.

 

[Chuck]

I got it fixed.
I changed to static IP, to a different address than what had been given from
DHCP, and I could ping the gateway.

I changed it back to DHCP and it didnt' work again. Changed it back to
static, deleted the lease in DHCP for the address that it was giving out for
this laptop, and re-enabled DHCP on the laptop, and it works.

Don't know why the first address all of the sudden would not work. It is
not in use by another machine.

A guess is that the laptop initially self assigned an address.
Seems the router and the laptop have or had a timing issue.
The problem is that some routers that worked perfectly well with XP
don't with Vista, due to the time it takes for the router to get to a
compatible protocol?

I had a similar problem with an HP laptop at a Motel. seems that there
were two hotel routers. One would connect if I went to the reception
area. My room was located such that it was not the router that the
laptop saw first. The second router (different model & make) would only
work intermittently with the laptop.