MPLS in a Full Mesh Core with Dual Homed CE Routers
We’re making a fairly substantial change to our core network in the New Year. It’s seeing us move from a flat, L3 routed network to an MPLS fabric. This option was chosen over VRF...
Tagged: IP
Virtualizing the Campus Network
I’ll be the first to admit that I never really intended to be talking about in-depth networking topics when I started this blog a few years back. However, that’s been where a lot of...
Some Experiments in OpenStack
As a little side project, I’ve been toying with OpenStack to replace ESXi on a couple of old servers I’ve got in a lab. Now that it’s up and running, I must say I’m...
Comware IRFs – A Few Lessons
Look in almost any organisation that’s been running for more than a few years and you’ll see legacy IT kit still keeping business critical services alive. There are places where IPX is still a...
Default Passwords Strike Again – This Time On Air
Breaking into broadcast transmissions isn’t anything new. We can go back to 1977 and the interruption of Southern Television, replacing the audio feed with some “interesting” content. Doing similar nowadays, where digital studio to...
TTL for Now
It’s always the little things that get you in technology. I’ve seen instances of stations taken off air by a simple fuse blowing. You also wouldn’t believe the level of embarrassment that can come...
Protecting that Web Stream with QoS on Cisco ADSL Routers
If you’ve got a broadcast critical web stream to worry about, prioritising it ahead of all other web traffic is an important job. I’ve seen a number of approaches to it over the years. The...
OpenSIPs in the DMZ
You’ve got your brand new broadcast IP codec. A pair of them really, one inside the network and the other outside. How do you make them talk to each other? Admittedly, it could be...
IP for Serial Controlled Audio Switches
It’s not often you talk about systems from the DOS era, especially now that we’re in 2015. However, the DCS playout system used to be shipped with a serial controlled audio router. The router...
SIP Audio Codecs – Are They the Future?
In the past, if you wanted broadcast quality audio on an OB, you had to book and ISDN months in advance at a fairly non-negligible cost. Even more costly was broadcasts really remote locations...