Calculating GNS3 idle PC value

Published by Keyboard Banger on

No matter how much processing power you’ve got, there will always be some processor cycles going on even if your routers are just sitting there for you to tape some CLI stuff.

First thing, before starting your full lab, make sure that the Idle PC Value for each type of router is well calculated.
For example, I added some 1710s as PCs for my lab:
1. all lab should be shut down, except one 1710 routeur.
2. start it
3. log to console, wait until it loads completely and enter privilieged mode
4. check your processor consumption. In Windows, it’s with Task Manager. With Ubuntu (my favourite), with System Monitor -> Resources:

5. now, recalculate the Idle PC value on GNS3

6. choose the value in front of which there’s an asterisk (*)

7.repeat these steps until you get low processor consumption:

Categories: Home Lab

Keyboard Banger

Keyboard Banger is a network engineer from Africa. He has been working in network support and administration since 2008. He started writing study notes about certification exams and technology topics a couple of years ago. When he's not writing articles, he can be found wandering on technical forums.

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