Opened 8 years ago
#15979 new defect
vertio-net causes Cisco AnyConnect instablity
| Reported by: | J. Fry | Owned by: | |
|---|---|---|---|
| Component: | network | Version: | VirtualBox 5.1.6 |
| Keywords: | AnyConnect virtio | Cc: | |
| Guest type: | Windows | Host type: | Windows |
Description
I have been running a Windows (8.1 and 10) guest for several years, using AnyConnect from the guest to VPN into our corporate network. At some point I transitioned to using the virtio-net driver and it worked well for a long time.
At some point a few months ago the VPN became very unstable. I would experience random disconnects, especially during periods of constant VPN utilization (screen sharing, large file transfers, etc).
When it disconnected, it would reconnect, but would not configure the ip stack properly and I could not pass any traffic without disconnecting and reconnecting. I lived with this for several months and decided to finally take some time to see if I could find a solution.
Ultimately, going to a virtualized Intel PRO/1000 MT Desktop adapter seemed to fix the problems. For some reason it appears that recent versions of AnyConnect stopped working well with the virtio-net adapter.
I don't know if this would be an AnyConnect, a VirtualBox, or a VirtIO-net issue, and will not be offended if this gets closed immediately. However I wanted to be sure it was documented somewhere for anyone else who may experience these issues in the future.
