So I'm running the cisco IOSv router in GNS3, and I've noticed that it actually has interfaces when I connect links, but doesn't show them when I go to do a show ip int brief. Literally the links are non-existent. I'm using the Cisco IOSv 15.6(2)T-1 version, and I installed it using the gns3 importing appliance feature. If anyone could shed some light on the issue would be much appreciated, thanks!