When you wake a Windows Vista-based computer from sleep, the default gateway setting is lost. When you run the ipconfig /all command to view the IP configuration, you cannot see the default gateway setting.

This problem occurs if the following conditions are true:

• The computer is configured as a Dynamic Host Configuration Protocol (DHCP) client, and the computer is connected to a DHCP server.
• The DHCP server configures a scope together with options 3 and 249.
• The computer is included in this scope.