Eveng - Idlepc

On the console of the eve-ng VM run:

dynamips -P 7200 /opt/unetlab/addons/dynamips/c7200-adventerprisek9-mz.152-4.S7.image

Run:

CTRL + ] then key I

Get the highest value which is better, copy it.

Edit /opt/unetlab/html/templates/c7200.php and change the default idlepc value

Reboot VM or kill the hanging dynamips process. The current folder you run the command will fill in with trash clean it up afterwards.