SYMPTOMS
After you enter a persistent route on your multi-homed computer where both network adapters are on the same subnet, the route either disappears or is assigned to a different network adapter on reboot.
When the IP stack initializes the stack on startup, Windows NT and Windows 2000 automatically create the default route to the 10.0.0.0 network.
For example, to observe this behavior you can configure two network adapters by using the following configuration information:
10.10.10.2 mask 255.255.255.0 gateway 10.10.10.4
10.10.10.5 mask 255.255.255.0
At a command prompt, type
route -p add 10.0.0.0 mask 255.255.255.0 10.10.10.4 IF 2, and then press ENTER.
This is an example of the output of a route print command before a reboot:
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 00 f8 04 18 df ...... Intel DC21140 PCI Fast Ethernet Adapter
0x3000004 ...00 d0 b7 48 34 2e ...... Intel(R) PRO Adapter
===========================================================================
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.10.10.4 10.10.10.5 1
10.0.0.0 255.255.255.0 10.10.10.4 10.10.10.2 1
10.10.10.0 255.255.255.0 10.10.10.2 10.10.10.2 1
10.10.10.0 255.255.255.0 10.10.10.5 10.10.10.5 1
10.10.10.2 255.255.255.255 127.0.0.1 127.0.0.1 1
10.10.10.5 255.255.255.255 127.0.0.1 127.0.0.1 1
10.255.255.255 255.255.255.255 10.10.10.2 10.10.10.2 1
10.255.255.255 255.255.255.255 10.10.10.5 10.10.10.5 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
224.0.0.0 224.0.0.0 10.10.10.2 10.10.10.2 1
224.0.0.0 224.0.0.0 10.10.10.5 10.10.10.5 1
255.255.255.255 255.255.255.255 10.10.10.2 10.10.10.2 1
Default Gateway: 10.10.10.4
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
10.0.0.0 255.255.255.0 10.10.10.4 1
NOTE: The preceding 10.0.0.0 network is associated with the 10.10.10.2 network adapter.
This is an example of the output of the route print command after a reboot:
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 d0 b7 48 34 2e ...... Intel(R) PRO Adapter
0x3 ...00 00 f8 04 18 df ...... Intel DC21140 PCI Fast Ethernet Adapter
===========================================================================
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 10.10.10.4 10.10.10.5 1
10.0.0.0 255.255.255.0 10.10.10.4 10.10.10.5 1
10.10.10.0 255.255.255.0 10.10.10.2 10.10.10.2 1
10.10.10.2 255.255.255.255 127.0.0.1 127.0.0.1 1
10.10.10.5 255.255.255.255 127.0.0.1 127.0.0.1 1
10.255.255.255 255.255.255.255 10.10.10.2 10.10.10.2 1
10.255.255.255 255.255.255.255 10.10.10.5 10.10.10.5 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
224.0.0.0 224.0.0.0 10.10.10.2 10.10.10.2 1
224.0.0.0 224.0.0.0 10.10.10.5 10.10.10.5 1
255.255.255.255 255.255.255.255 10.10.10.5 10.10.10.5 1
Default Gateway: 10.10.10.4
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
10.0.0.0 255.255.255.0 10.10.10.4 1
Note that the preceding 10.0.0.0 network is now associated with the 10.10.10.5 network adapter.