Hi.
I built a new OpenBSD 5.6 virtual machine (amd64 architecture) on a vSphere 5.5
deployment using the new vmxnet3 network driver (3 NIC).
I receive this console message every now and then:
vmx2: short packet (<some number, even 0>)
I believe this comes from this part of code in sys/dev/pci/if_vmx.c:
if (len < VMXNET3_MIN_MTU) {
printf("%s: short packet (%d)\n", ifp->if_xname, len);
m_freem(m);
goto skip_buffer;
}
I did search the interwebs to find out some comments about this kind of short
packets originating from VMware cards and found this comment interesting:
As we saw a few times already on different operating systems,
vmware drivers expect short packets to be padded as required
by corresponding RFC.
Reference: sys/dev/pci/if_vmx.c
(http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/dev/pci/if_vmx.c?rev=1.22&content-type=text/x-cvsweb-markup)
See others implementation (comment above comes from this post):
https://lists.gnu.org/archive/html/qemu-trivial/2014-08/msg00238.html
