Virtual routers save the day

Open source routers and Windows Server's routing features give network admins more options

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Davis recommended I use my dual-NIC server to handle routing and pointed me to a virtual router from Vyatta. I downloaded and installed it into Hyper-V without an issue. There's a GUI side if you have the subscription version, but I had the open source, free version, so I had to set up my router through the command line. It was a blast from the past, establishing static routes through the command line, especially in Linux, but once I got ahold of some online command assistance, it was pretty simple. The Vyatta virtual router is a solid option because it doesn't take a ton of resources from your Hyper-V server, which you most likely want to leave for your production virtual machines.

Virtual routers are great on the enterprise level because they can save you money on the hardware of a fully functional system. Also, as virtual boxes, they also take up no room in your network. The negative is that you may have to learn enough command-line configuration to kick off the GUI features, then you can work through a browser interface.

Liberman, my Windows guru, recommended I use Microsoft's routing and remote access (RRAS) solution through Windows Server 2008 R2. I liked the idea and saw that others were using virtual machines to do this, but I wanted to save my VMs for Exchange servers for my DAG. Instead, I installed it directly on the Hyper-V parent system -- probably not a best practice.

The benefit is that I felt comfortable immediately because it's Windows. Wizards and action items helped me configure the server and establish static routes where necessary, until I had a fully functional setup. The value of RRAS is that it's included with Windows, so you don't have to pay extra to turn a dual-NIC server into an enterprise router, even if only for a lab setup.

One other tip from Liberman: If you're doing this in a home office and have a family Internet connection, you'll want to use subnetting to ensure both sides of your networks can access the Internet. In my case, the 192-address network can easily get out through my home router that uses 192 address, but the 10-address network is jammed because the home router doesn't know how to respond. By splitting the 192.168.1.x network with a subnet mask, I could've accomplished both goals of securing Internet connectivity from both sides with multiple subnets and two distinct sites on either side of the router. Brilliant stuff.

Everything is now up and running, and I can move forward with my DAG testing.

Sleepless nights are part of the IT geek's life, and we wear them like badges. Do you have a tale from the trenches you'd like to share? Share your war story in the comments (Add a comment) below.

This article, "Virtual routers save the day," was originally published at Read more of J. Peter Bruzzese's Enterprise Windows blog and follow the latest developments in Windows at For the latest business technology news, follow on Twitter.

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