My Etherealmind

Dynamips and dynagen are well behaved programs most of the time. Occasionally I am configuring a feature or two that causes IOS to crash (most recently I was configuring MPLS and redistribution on c2600 IOS which got really busted).

Then I noticed that my hard drive didn’t have a lot of free space….

I am often find myself needing to stop, make a configuration change to Dynagen, and then restart. To make sure I don’t miss anything I go to every screen and write the configuration.

In iTerm, there is the ability to send the same command to all screens at once, excellent!

As someone who travels often, and always looking to make use of the travel time, I was pleased to find that I can suspend and resume the Dynamips routers. This saves me battery on longer trips, or lets me have more CPU when I running other applications such as Parallels / VMware to give me some Microsoft Visio joy. iTerm sessions are not terminated by doing this, they just don’t show any data until you resume the sessions.

To get started with my lab faster I use iTerm to prepare a full set of possible sessions. This post walks through how to do this which should help you to get started faster. Also some keyboard shortcuts.

I have a directory ‘dynalab’ in my ‘Documents’ where I have put ALL my Dynamips / Dynagen related files. I created a directory there which has all my IOS images, this makes more sense to my mind. Makes it easier to backup.

Tips for Dynamips / Dynagen on Leopard OS X

I am doing some proof of concept for an MPLS data centre and did something I have not normally done. I used my MacBook Pro to run Dynamips / Dynagen. I am very pleased with 9 3640 routers running Enterprise Plus, and 2 2611 Routers with IP and running less than 60% CPU across both [...]