virtualbox.org

Am running Win7Pro on both host and guest of VBox v.4.3.20. Guest network config'ed for NAT adapter. When host and guest are booted, network connections thru both hardwired LAN and WLAN for both host and guest are fine.

However, for instance say host WLAN is connected to AP 1, and guest NAT network is connected thru host WLAN connection as expected, but if host WLAN is disconnected from AP 1 and re-connected to AP 2, guest NAT network remains connected but goes unresponsive and must reboot guest to restore guest NAT connection.

Does VBox have some means of "resetting" guest network while running without having to reboot guest?

Have you tried "disconnecting" the guest's virtual network cable, or toggling some other network setting for the guest? (Just thinking, no firm reasons for the suggestion.)

Sounds like the same issue as here - see Klaus' post.