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I have a Windows 2008 Server with multiple IPs on same nic.

Posted on 2009-02-17
Medium Priority
Last Modified: 2013-12-05
I have a Windows 2008 Server with multiple IPs on same nic. The IP I placed in the IP settings, isn't showing as the primary ip. It's seems to list the IPs in order. Is there a way to set the order?

Here are the IPs and the order that I want.
xxx.xxx.0.16 - primary
xxx.xxx.0.15 - secondary
xxx.xxx.0.17 - secondary

When I do a - whatismyip - it comes back with xxx.xxx.0.15 when it should be .16

It worked how I needed it on windows 2000 server. Is it possible to do the same on Windows 2008 server?
Question by:mntatar
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LVL 22

Accepted Solution

Paka earned 2000 total points
ID: 23698830
If you have multiple IPs on a single NIC in the same subnet (which it looks like you do), they will each be routed to the internet (and whatismyip) with the same metric.  To see the metrics use: "route print" from a command line.

You can change these metrics using "ROUTE ADD networkid MASK networksubnetmask networkinterface metric x -p"; so in your case, you would want .16 to be your least costly way:
route add mask x.x.x.16 metric 5 -p

BTW - What is the last octect of your default gateway?

Author Comment

ID: 23723575
Yes - I have multiple IPs on a single NIC in the same subnet.

Below is my route table.

Also, when adding a ROUTE ADD, how do I keep it on reboots?

Thanks for your response.

IPv4 Route Table
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
      xxx.xxx.0.1     xxx.xxx.0.15    266         On-link    306         On-link    306         On-link    306
      xxx.xxx.0.0         On-link      xxx.xxx.0.15    266
     xxx.xxx.0.15         On-link      xxx.xxx.0.15    266
     xxx.xxx.0.16         On-link      xxx.xxx.0.15    266
     xxx.xxx.0.17         On-link      xxx.xxx.0.15    266
    xxx.xxx.0.255         On-link      xxx.xxx.0.15    266         On-link    306         On-link      xxx.xxx.0.15    266         On-link    306         On-link      xxx.xxx.0.15    266
Persistent Routes:
  Network Address          Netmask  Gateway Address  Metric
      xxx.xxx.0.1  Default

Author Comment

ID: 23746014
Raised the point value to 500, still needing help.
LVL 22

Assisted Solution

Paka earned 2000 total points
ID: 23753654
To make the routes persisten after reboots, you would use the route add ... -p

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