My new best friend: RackTables
Nov 29

For years I’ve been using a piece of software that a friend wrote to help me manage servers, switches, routers, workstations, asset tracking, IP address management, and how all my devices are connected to each other.  It was a very good piece of software, but even though one of the features was to tell the system when the equipment is located (office, datacenter, etc), I couldn’t tell where in that location it was.  So I searched around and found quite a few open source applications that have popped up in the last few years, most of them were garbage, some of them were decent but even if they had a few of the features I wanted, they usually were missing key features.

That’s when I came across RackTables.  It’s simply amazing.  It let’s me keep track of all my hardware, keep track of my locations (office, datacenter, etc), keep track of where my hardware is located, how my hardware is interconnected, keeps track of all IP subnets and what’s allocated, and much more.  Anyone who’s responsible for managing servers, networks or datacenters should definitely check out RackTables.  There’s a great demo on their site.

With RackTables you can:

  • Have a list of all devices you’ve got
  • Have a list of all racks and enclosures
  • Mount the devices into the racks
  • Maintain physical ports of the devices and links between them
  • Manage IP addresses, assign them to the devices and group them into networks
  • Document your firewall and NAT rules
  • Describe your loadbalancing policy and store loadbalancing configuration
  • Attach files to various objects in the system
  • Create users, assign permissions and allow or deny any actions they can do
  • Label everything and even everyone with flexible tagging system
  • And, of course, you can access all that from anywhere in the world. All you need is a browser and internet connection!

Find out what version of Ubuntu
Nov 23

I’ve recently had to start using Ubuntu, I’m normally a RedHat/Fedora/CentOS guy.  I’ve been using RedHat or derivatives since 1995,  and while I’ve played a bit with other distro’s, I really dislike any of the Debian derivatives.  Anyway, I’ve been needing to do an audit of a bunch of linux servers and find out what version of Ubuntu they were running.  So here’s how I was able to find out.

On a command line type:

cat /etc/lsb-release

If you’re using the Gnome Desktop:

  1. Go to the Main Menu
  2. Click System, Administration, then select System Monitor
  3. Select the System tab.
  4. The version of Ubuntu will be displayed

Juniper J-Series Routers and VLAN’s
Nov 22

Recently I had the need to configure VLAN’s on a couple of Juniper J2320 routers.  If you talk to a Juniper pre-sales engineer or someone at CDW who are supposed to have experts that know these products like the back of their hand, they will say, of course the J-Series routers support VLAN’s.  Technically that’s true, but there are limitations and the pre-sales engineers don’t know the limitations.

First, you cannot do VLAN’s on the onboard ethernet interfaces.  Neither Juniper or CDW pre-sales engineer’s knew this.  It was hinted to me after I dug deep with the Juniper TAC that onboard NIC’s can be used for network traffic, but if you’re doing a lot of things with them they’re better for management and clustering.

Second, VLAN’s are only supported on the addon uPIM cards. Again, neither Juniper or CDW knew this.

Third, and most importantly, VLAN switching happens on the addon uPIM card and is only supported on 1 uPIM at a time, not on the router’s backplane.  So if you need VLAN more than 16 ports, then the Juniper J-Series routers is probably not the product you want to buy.

I should also say that this router is a great product, I’ve been using them for two of my datacenters and running BGP between the two datacenters, with a private fiber connection between them and they run beautifully.  These routers are great for an office or small datacenter.  When talking with Juniper, they couldn’t understand why a company would use them in their datacenter instead of purchasing one of the larger models.  For a smaller company that has traffic under 100Gbits/sec, these are great routers.

10 Things Your IT Guy Wants You to Know
Nov 22

Here is a great post about 10 things your IT guy wants you to know.  I think this should be required reading for all employees.


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