Here’s some of the commands I type to get GNS3 working a little bit better. By specifying the ports to use a specific speed and duplex you can avoid the dreaded Mismatch and the Module not working issue.
Please note in GNS3 I stictly use Cisco 2691 routers. When needed I add the “NM-16ESW” adapter to slot1.
NOTE – If you are creating a project file it’s best to save the config the way GNS3 likes. To do this configure the device to the base config needed for the lab.
- Right click the device – Select “Startup-config”
- Click “Load from nvram”
- Hit “Apply” and then “OK”
- The Device if rebooted will now load this base config.
PC
Typical Command for PCs.
- conf t
- int fa0/0
- speed 100
- duplex full
- ipv6 address autoconfig
- no shut
- end
- wr
- !
Router
- conf t
- int range fa0/0 – 1
- speed 100
- duplex full
- end
- wr
- !
Router with Switch (NM-16ESW)
- conf t
- int range fa1/0 – 15
- switchport
- speed 100
- duplex full
- end
- wr
- !
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