Bug 256413

Summary: emulators/virtualbox-ose bridged networking emulated adapters poor performance
Product: Ports & Packages Reporter: rdunkle
Component: Individual Port(s)Assignee: Virtualbox Team (Nobody) <vbox>
Status: New ---    
Severity: Affects Only Me CC: groenveld, rozhuk.im
Priority: --- Flags: bugzilla: maintainer-feedback? (vbox)
Version: Latest   
Hardware: amd64   
OS: Any   

Description rdunkle 2021-06-04 11:17:59 UTC
13.0-STABLE FreeBSD 13.0-STABLE #0 stable/13-4a4a17495
I have noticed that using bridged networking with any of the emulated adapters that network performance is poor. I particularly notice when trying to scp files to a Linux guests (RHEL 8.3, Alma 8.4), Solaris 9.  I found that networking is normal if I select virtio network on the guest.  I have switched physical network cards, and the problem persists.
Comment 1 Ivan Rozhuk 2021-09-21 06:02:06 UTC
Try to disable HW offloads on NIC:
ifconfig igb0 -rxcsum -txcsum -vlanhwtso -lro -tso4 -tso6 down up
Comment 2 rdunkle 2021-09-21 08:31:16 UTC
That made a world of difference.  The nic works normally.
Thank you!