I installed GNS3 in my windows 7. And bridged GNS3 with loop back interface.
I set the same subnet on both loop back interface and virtual router interface,but they cannot communication.
After tried lots of methods, include reboot my machine / restart GNS3 / enable then disable the windows firewall, All these operations didn't work.
At last, I set the GNS3 properties to "always running in administrator mode" and set the compatibility to "windows vista sp 2"
Start GNS3
All things works fine now!
