DHCP lease received, but not the right one!

[fife]

Strange one this!

Linux guest (Centos) on Linux host (Debian). DHCP server is on a Netgear R6300 router.

Guest requests DHCP lease just fine, and is assigned an IP. Forcing a release and request will reliably fetch another IP.

The router has been told to assign the guest's MAC address a particular IP. This works for all other devices on the network, including the VirtualBox host! But for some reason, guests on that host will never get the right IP - but will always get *a* lease. It's as though the MAC isn't being transmitted properly, but that is of course impossible, or the network wouldn't work at all.

Ideas?

[mpack]

What networking mode are the guests using?

[fife]

What networking mode are the guests using?

Bridged