route add interface problem

[pak000]

Hi,

I'm trying to configure a VPN and am having trouble with the route command...I had it working fine, but then there was an ip clash and things started going wrong. I've resolved the ip clash and now just have a problem with the routing table.

the problem is that whenever I add a new route, vista is ignoring the VPN tap interface and defaulting to the network card

C:\Windows\system32>route print
===========================================================================
Interface List
 20 ...00 ff b6 fe ac e6 ...... TAP-Win32 Adapter V9
 15 ...00 1d 7d 75 e4 33 ...... Realtek RTL8168C(P)/8111C(P) Family PCI-E Gigabi
t Ethernet NIC (NDIS 6.0)
 14 ...00 20 ed 36 ca 4b ...... Bluetooth Device (Personal Area Network) #2
  1 ........................... Software Loopback Interface 1
 18 ...00 00 00 00 00 00 00 e0  isatap.{C51EF404-B4FF-466F-A66F-AFAAF654F3C9}
 10 ...02 00 54 55 4e 01 ...... Teredo Tunneling Pseudo-Interface
 23 ...00 00 00 00 00 00 00 e0  isatap.{A2893D39-4AFE-481E-830F-F3F78A82DF3A}
 29 ...00 00 00 00 00 00 00 e0  Microsoft ISATAP Adapter #3
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.0.1      192.168.0.6    276
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
      169.254.0.0      255.255.0.0         On-link       192.168.0.6     30
  169.254.255.255  255.255.255.255         On-link       192.168.0.6    276
       172.16.0.0      255.255.0.0       172.16.0.2      192.168.0.6     21
   172.16.255.255  255.255.255.255       172.16.0.2      192.168.0.6     21
...............

the last two lines are a problem - although it specifies the correct gateway it is using my LAN interface. - it should be using the TAP interface.

I've tried removing the lines and re-adding with the command

route add 172.16.0.0 mask 255.255.0.0 172.16.0.2 metric 1 if 20

and

route add 172.16.0.0 mask 255.255.0.0 172.16.0.2 metric 1

but both ignore the interface I need

Does anyone know why/how to fix it?

Thanks

[b0redom]

Did you try route deleting them and readding them?

[pak000]

yes, the problem just reoccurs