Netbox Upgrade Play-by-play
·6 min read
I just upgraded my Netbox server from v2.7.6 to v3.4.8. This is just a record of what I did in case anyone want to know how I did it. Environment The source v2.7.6 server is an Ubuntu 18.04 VM. Yes, …
Linux
A Quick Intro to Google's Capirca
·4 min read
Yeled left a comment earlier this week asking if I’d seen Google’s Capirca. I’d heard of it and checked out some presentation slides on it, but I’d never actually tried it out, …
An Interesting Problem with Multiple DCs on a Stick
·3 min read
We talked about running multiple data centers on a stick back in August, which is where you have multiple logical pairs of client and server VLANs on a single CSM for different tiers or functions. The …
Unix Epoch + 1234567890 = Next Friday
·1 min read
I’m kind of an obsessive-compulsive when it comes to numbers (1, 2, 3, 4, 5…), so I’m fairly excited about next Friday (..6, 7, 8, 9, 10…) when Epoch time reaches 1234567890 …
Leap Second
·1 min read
Did anyone notice (or care about) the leap second? I did neither. Here’s some cool output from Kevin Oberman on the NANOG list, though. bash-2.05b# date Thu Jan 1 00:59:58 CET 2009 bash-2.05b# …
Free and Awesome Network Tools
·3 min read
We all have limited budgets these days. Long gone are the days of unlimited resources and uncontrollable expansion of the network, so it’s important that any network dude or dudette pay …
A Simple BGP Lab with Dynamips/Dynagen
·4 min read
I assume you take every word I say to heart and that you’ve been using Dynamips/Dynagen for a few days now, right? Good. That’s a start, but let’s break down a simple lab to make …
Finding Hosts on Layer 2
·1 min read
Most firewalls should block [tag]ICMP[/tag] requests to them, so how do you know that your router or server has layer-2 connectivity to one? It’s pretty elementary, actually, but I’ve …
Using a Linux Box as a File Server
·3 min read
Ever heard of Samba? You should. Samba is an open-source project “that provides seamless file and print services to SMB/CIFS clients.” That’s from the project’s website, but …