o nha minh cai gns 3 thi bi tinh trang nhu sau:
luc dau tao ra mo hinh thi config binh thuong.
Nhung sau khi save lai thi tat gns3 va chay lai gns3, open file vua save thi no bao loi "206-unable to create UDP NIO". FIle Net thi do gns tu sinh ra
Hinh nhu sau

Cai dynagen sau khi chinh file net, rui chay cung bao loi tuong tu nhu the.
Ai biet chi zup nha. Thanks a lot