Dell Server, broadcom NIC, 5 IP addresses all on the same subnet. Let's say 100.100.63.67-71. Windows Server 2003.
From another system on the 100.100.63.* subnet, I can ping all IP addresses no problem.
From a system on another subnet, say 100.100.58.*, I can ping all but one, the 100.100.63.70 address. It's in the middle of the IP range.
In Win2003 server, I specify the default gateway once as 100.100.63.1. Each individual IP has a subnet mask of 255.255.255.0. I've verified they are all the same.
I'm stumped... why would 100.100.63.70 not respond to pings from outside it's subnet, while the others will?