I have several Windows 7 (SP1 and not) that are randomly going to a different gateway. They start with EITHER a DHCP given gateway of 192.168.1.1 (or a static). After a 'random' amount of time they change to 192.168.1.254, shown by doing a tracert, but the route print does not change. 1st) How does Windows 7 ignore a static route or a permanent route that is added. 2) Network does not have any rouge DHCP servers 3) Other then the Bonjour issues what else causes the network static to 'autoconfigure' and not honor static/manually added gateways (ip and netmask do not change, either on static or DHCP enabled clients. 4) XP clients (all versions), OS-X, and *BSD boxes are NOT effected, only some Windows 7 clients. Two of these machines had the Bonjour issue of an Unknown Interface, but that has been corrected.

which network you are selected workgroup public home

These machines are a part of of a domain, thus network location is not available for to change on them. -Niteware

I have found out that if I place a script that loops and all it does is tracert to an external server for only one hop (-h 1) the machines in question do not lose/change their routes to the 'bad 192.168.1.254 address'. I still can not find any information on what would cause a Windows 7 OS to ignore a static IP addressing for the gateway and/or permanently added routes and dynamically change just the gateway of that machine. Of course some of these machine are DHCP, but it does not matter, static or DCHP, their routing gets changed to a bad/non-existent address. -Robert-Niteware

I only have one DHCP server on the subnet. Confirmed from various rogue detectors including Microsoft's version. The Windows 7 PC are the only ones on this subnet that are affected, even STATIC IP and permanent routed Win7 clients are having their route modified. -Niteware

Hey, can you download & monitor your-self who is providing IP to PC. you can use - IP sniffer or DHCP Explorer or any other DHCP Analyzer software to see, which DHCP server is providing IP to PC (remove any manually configured IP )

Hi, it is said, "you cannot use two DHCP server in a same Network/Subnet" You have 1 Network class C - 192.168.1.0/255.255.255.0 Your Router DHCP is enabled -- ip 192.168.1.1 Your Server has DHCP enabled -- ip 192.168.1.254 (if am not wrong) you have to disable one of them. "First come first serve" For troubleshooting -- Set Router's ip range - 192.168.1.2 to 192.168.1.100 Set DHCP server ip range - 192.168.1.101 to 192.168.1.200 -- harjit

There is only one DHCP server, the correct one, I have already checked that by using various rogue DHCP toolsets. This 'routing change' does not effect IP, netmask; only the routing table on Windows 7 clients (NOT WinXP, Server2003/2008 using DHCP or Static, or OS-X, *BSD, ...). This routing change happens if the client is DHCP'd or Statically addressed... -Niteware

I'll take 'ICMP Redirects' for $200 Alex Do you have more than one layer 3 path out of this subnet?