GNS3 shows this error when there is no default IOS image set for qemu, to resolve this problem click on Edit/Preferences. You need a IOS image foe qemu host that you can download free from internet. Then click on Qemu\qemu tab and define the "identifier name" and binary image location and then click on save button.
IOS image configuration for Qemu host is completed.
how to configure IP and default gateway for qemu host:
- Now insert a "qemu host" and router on topology area rigth click on host then click on start a console is appear wait to complete the loading. after some time console appear as shown in figure, now you can configure the qemu host.
- For IP and default gateway configuration use the following commands.
Configure IP For Qemu: root@box:$ Ifconfig eth0 192.168.1.11 netmask 255.255.255.0
Configure GW For Qemu: root@box:$ Route add default gw 192.168.1.1 eth0
For more information you can ask any question thanks for visiting.