I am also having an issue with my two MacBook Airs and the Archer C7. I worked out that if I specify a channel my Mac seems a lot more happier. I found this link which is old but I thought it may...

Region : Australia Model : Archer C7 Hardware Version : Not Clear Firmware Version : ISP : Internode I have been having trouble getting IPv6 working. I am using PPPoEv6 to connect. It says...