The Asus router isn't going to be the problem and you need to be rebooting the shub to force it to reconnect to the network and channels. If there is an issue with noise on the upstream and the shub is unable to maintain its connection it will move to a different bonding group if one is available and give the appearance that the problem is no more.
If a mod picks this thread up it could probably do with moving to the VM Internet section where it will draw more attention because it isn't a lan/networking issue