It was at a workplace the old IT staffer insisted on hard assigned IP addresses. They had never figured out how to use DHCP.
But then again you are trying failover. I didn't think that worked in XP.
It's time to ask Microsoft to tell you what's broken.
i am having a problem with windows routing tables on pc's at my workplace.
these pc's are running windows xp sp3 and the problem occurs when i change the default gateway
the pc's are on subnet 10.181.1.0/24 with d/g 10.181.1.11.
with this config the routing table on each pc functions as expected [e.g. it stores a
route to its own subnet [10.181.1.0/24] but no routes to other subnets [e.g. it wont store
a route to 10.180.1.0/24, it will simply send traffic for this network to its default
however, because of a network re-design i need to change the default gateway for this lan
to 10.181.1.254. when i do this something strange happens. the windows routing table on
each pc starts storing routes to the entire 10.0.0.0/8 network, even though the current
config on the pc is still a /24 network [e.g. 10.181.1.21/24, d/g 10.181.1.254].
its as if when i change the pc's default gateway the windows routing table treats the
10.181.1.0/24 subnet as if its a classful 10.0.0.0/8 network.
so what, right? i can still connect to these other networks, the pc is just using a route
stored in its local routing table rather than sending the traffic to its default gateway.
The problem is that we have a backup default gateway of 10.181.1.12 which we failover to
if the primary gateway goes down. when we test the failover to 10.181.1.12 the pcs are still
sending non-local traffic to 10.181.1.11 [since they still have these routes stored locally in their
windows routing tables]. i want them to send the traffic to 10.181.1.254 [a layer 3 core switch, which then
either routes traffic to 10.181.1.11 or .12]
i have tried changing the default gateway to a whole range of ip's and the same problem occurs each time.
i have rebooted each pc after changing its d/g and the problem remains the same. i have tried
deleting all ip address information off the pc, then re-entering it with the new d/g, then rebooting
the pc but the problem remains the same.
so, to sum up, when i change the d/g of any pc on subnet 10.181.1.0/24, the pcs routing table starts storing routes
in its local routing table to the classful 10.0.0.0/8 network, instead of just the classless 10.181.1.0/24 network.
Has anyone come across this before?