Solved

Routing Problems on VM

Posted on 2013-11-18
3
196 Views
Last Modified: 2014-01-21
Hi

I have a Virtual machine configured with windows 2008 R2 and Two NICs in a VMware Environment. The virtual machine has one nic in the Production Network and the other in the DMZ. it is suppose to send traffic destined for 10.*.*.* network to the nic with the gateway of 192.*.*.* how ever after a day or two communication stops. if you reboot the APN in the DMZ and reboot the server communication continues. Any idea?
0
Comment
Question by:Helao Mwapangasha
  • 2
3 Comments
 
LVL 13

Expert Comment

by:SagiEDoc
ID: 39658681
You can add a static route on the server. Open a command window and type:

route add 10.*.*.* MASK 255.0.0.0 192.*.*.*

Clearly do not use "*" if the destination network is 10.51.1.0 use that and the final IP is the actual gateway. Ensure that you only have one gateway entered on one network card. So typically you would have your production network listed. The NIC for the DMZ should have no gateway listed.
0
 
LVL 3

Author Comment

by:Helao Mwapangasha
ID: 39658992
Hi SagiEDoc

I do have routes config. Internal LAN has no Gateway specified and the DMZ Lan has one

Sample route print is attached
routes.PNG
0
 
LVL 13

Accepted Solution

by:
SagiEDoc earned 500 total points
ID: 39659023
I had a similar issue where VM's would loose network. I am not sure if you have a similar setup but this is what I traced the problem to.
I had two network cards (physical) connected to the virtual network. One of these cards was working fine, the other had a misconfigured VLAN. If the virtual network connected to the problem NIC the VM lost connectivity. Once I corrected the problem it all came right. I picked up the problem by looking at the observed ranges of the virtual network (screen shot attached)
I corrected the problem but also to manage this problem in the future I set the Network failover detection to Beacon probing (another screen shot attached.) The default setting is link status which basically means if there is a network cable plugged in and the link status is good then all is well.
By changing this setting it allows VMware to failover the NIC's if there is an issue on the network even if the link status is good. I hope this solves your problem.
1.JPG
2.JPG
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Join & Write a Comment

The password reset disk is often mentioned as the best solution to deal with the lost Windows password problem. In Windows 2008, 7, Vista and XP, a password reset disk can be easily created. But besides Windows 7/Vista/XP, Windows Server 2008 and ot…
I'm a big fan of Windows' offline folder caching and have used it on my laptops for over a decade.  One thing I don't like about it, however, is how difficult Microsoft has made it for the cache to be moved out of the Windows folder.  Here's how to …
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…
With the advent of Windows 10, Microsoft is pushing a Get Windows 10 icon into the notification area (system tray) of qualifying computers. There are many reasons for wanting to remove this icon. This two-part Experts Exchange video Micro Tutorial s…

707 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

10 Experts available now in Live!

Get 1:1 Help Now