Windows Server 2008: specifying the default IP address when NIC has multiple addresses

Posted by Cédric Boivin on Server Fault See other posts from Server Fault or by Cédric Boivin
Published on 2010-03-06T13:01:30Z Indexed on 2010/03/08 22:08 UTC
Read the original article Hit count: 785

I have a Windows Server which has ~10 IP addresses statically bound. The problem is I don't know how to specify the default IP address.

Sometimes when I assign a new address to the NIC, the default IP address changes with the last IP entered in the advanced IP configuration on the NIC. This has the effect (since I use NAT) that the outgoing public IP changes too.

Even though this problem is currently on Windows Server 2008

How can you set the default IP address on a NIC when it has multiple IP addresses bound?

There is more explication on my probleme.

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Here is the ipconfig

DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.99.49(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.51(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.52(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.53(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.54(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.55(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.56(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.57(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.58(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.59(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.60(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.61(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.62(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.64(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.65(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.66(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.67(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.68(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.70(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.71(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.100(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.108(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.109(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.112(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 192.168.99.63(Duplicate)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.99.1

If i do a pathping there is the answer, the first up is the 99.49, also if my default ip is 99.100

Tracing route to www.l.google.com [72.14.204.99]
over a maximum of 30 hops:
  0  Machine [192.168.99.49]

There is the routing table on the machine

 Network Destination        Netmask          Gateway       Interface  Metric
              0.0.0.0          0.0.0.0     192.168.99.1    192.168.99.49    261
           10.10.10.0    255.255.255.0         On-link       10.10.10.10    261
          10.10.10.10  255.255.255.255         On-link       10.10.10.10    261
         10.10.10.255  255.255.255.255         On-link       10.10.10.10    261
         192.168.99.0    255.255.255.0         On-link     192.168.99.49    261
        192.168.99.49  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.51  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.52  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.53  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.54  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.55  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.56  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.57  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.58  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.59  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.60  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.61  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.62  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.64  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.65  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.66  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.67  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.68  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.70  255.255.255.255         On-link     192.168.99.49    261
        192.168.99.71  255.255.255.255         On-link     192.168.99.49    261
       192.168.99.100  255.255.255.255         On-link     192.168.99.49    261
       192.168.99.108  255.255.255.255         On-link     192.168.99.49    261
       192.168.99.109  255.255.255.255         On-link     192.168.99.49    261
       192.168.99.112  255.255.255.255         On-link     192.168.99.49    261
       192.168.99.255  255.255.255.255         On-link     192.168.99.49    261
            224.0.0.0        240.0.0.0         On-link     192.168.99.49    261
            224.0.0.0        240.0.0.0         On-link       10.10.10.10    261
      255.255.255.255  255.255.255.255         On-link     192.168.99.49    261
      255.255.255.255  255.255.255.255         On-link       10.10.10.10    261

How i can be sure the ip use in the image ( suppose to be the default ip address ) will be use by my server as the default address ?

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