Virtual 2008 Servers can't connect with multiple IPs

Posted on 2011-11-01
Last Modified: 2013-11-23
We have a 2008 virtual server running on a 2008 host. We have 2 IPs currently. When we add 2 more IPs from a different subnet to the same NIC on the virtual server, it will eventually stop responding to ping or any incoming traffic.  If we remove the new IPs it works fine again.

We were able to duplicate this on another virtual 2008 server.

 Any thoughts on this.?
Question by:Tonygret
    LVL 41

    Accepted Solution

    How can you have IPs from multiple subnets assigned to the same physical NIC? A NIC can only be on only one subnet at a time (unless you are using VLAN trunking).
    Try connecting a physical NIC to each physical subnet you want the VM to have an IP address on. Create an external virtual network for each of those subnets. Add a new network adapter to the VM for each external network. Boot the VM and assign the IP addresses. You will also need to be aware of routing issues. In general, a machine should have only 1 default gateway. Any other routes required should be entered statically.


    Author Closing Comment

    Thank you for your help.  I am closing this question and opening a new one as it seem the actual problem continued even with one set of IPs.  It appears to be a virtual network interface issue.

    Featured Post

    Looking for New Ways to Advertise?

    Engage with tech pros in our community with native advertising, as a Vendor Expert, and more.

    Join & Write a Comment

    Introduction In one of my previous articles (, I explained how to create a native Windows 2012 Cluster.  The metho…
    Steve Jobs once said that Blu-ray is "a bag of hurt". As Macs users well known, things haven’t settled down (at least not from Apple’s perspective). Several years after that comment, Mac OS X still doesn’t support Blu-ray playback, nor has any Mac s…
    This tutorial will walk an individual through locating and launching the BEUtility application and how to execute it on the appropriate database. Log onto the server running the Backup Exec database. In a larger environment, this would generally be …
    This tutorial will give a short introduction and overview of Backup Exec 2012 and how to navigate and perform basic functions. Click on the Backup Exec button in the upper left corner. From here, are global settings for the application such as conne…

    734 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    19 Experts available now in Live!

    Get 1:1 Help Now