[Bug 215737] [bhyve] utilizing virtio-net truncates jumbo frames at 4084 bytes length

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215737

--- Comment #9 from Harald Schmalzbauer <bugzilla.freebsd at omnilan.de> ---
(In reply to P Kern from comment #8)

*offtopic, vmxnet3 specific only, nothing PR related in this comment*:

It's correct that if_vmx(4) does not mention MTU or "jumbo" frames, but I was
quiet sure it _does_ support 9k frames – just verified positive (stable/11 on
ESXi6.5)!

if_vmx(4) has been improved over the time, but it still lacks ALTQ support.
And vmx3f(4) is still a bit more efficient.
Else, if_vmx(4) is featurewise on par with vmx3f(4).

Unfortunately vmx3f(4) isn't supported by VMware any longer.
I made a patch which allows vmx3f(4) to be compiled on FreeBSD-11, and it also
seems to be stable _without_ ALTQ.  ALTQ causes panics!!!  Unfortunately my
skills/time don't last to fix.
Here's the compile-patch in case somebody wants to take over:
ftp://ftp.omnilan.de/pub/FreeBSD/OmniLAN/vmware-esxi_kernel-modules/10.1.5/FreeBSD-11_vmxnet3-Tools_10.1.5-source.patch

-harry

-- 
You are receiving this mail because:
You are the assignee for the bug.