Vi is arguably the best text editing software in the world. There, I said it… deal with it! It should be noted that while many people continue to refer to Vi simply as such, Vim (Vi improved) has been the standard since around 1998. Vi? Old and busted. Vim? New hotness. Vi isn’t an editor […]
SNMP can save your life
Ever get locked out of a router or switch that is many hours or even days away? Recently, I had the pleasure, again. For some reason, be it the consultant that was turning up our MLPPP session on site, the engineer who was working with the consultant, or a random case of configuration corruption…. a […]
Best Practices and Securing Cisco IOS
Everyone has different views on hardening IOS, and while I do not claim to be an expert, these are the practices that I commonly use when bringing up a new device. If you see something I missed, please leave a comment and I’ll add it to the list and send the credit your way. I’ve […]
Time-based ACLs
Ever since Cisco released IOS 12.0.1T we’ve had the ability to broaden the reach of the extended ACL to allow the influence of time. Time-based ACLs reference a time range that is identified by a name, during that time the ACL is in effect. The time range relies on the router system clock. While router […]
Cisco MPLS VRF Configuration and Demo
A while back I asked everyone to vote on what topic they wanted to see next, and by no surprise almost every voted for MPLS VRFs. When I started working on this, I decided to take a new approach to these posts, in my previous posts about JunOS Olives I provided ample screen shots and […]
Layer 2 Ethernet transport over OpenVPN
One of the things I used to deploy frequently at my previous position was transport for other ISPs and businesses. Since MPLS support is in its infancy on the Imagestream platform, and was yet to be deployed at the time, this is what I came up with. The configuration is quite simple, setup an OpenVPN […]
