[Bug 236999] vmx driver stops sending network packets and resets connections (TCP) but allows ICMP

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236999

--- Comment #1 from Patrick Kelsey <pkelsey at freebsd.org> ---
I tried to reproduce using the latest snapshot on ESXi 6.7, but so far I have
been unable to.  I was able to repeatedly scp a 100 MiB file from the machine
under test without issue (~line rate at 1G each time).

You said all NIC offloads were enabled.  lro isn't enabled by default, which
suggests there may be other NIC-related settings that are not at defaults.  If
so, please share them.

Details from the system I used:

Client version:      1.25.0
Client build number: 7872652
ESXi version:        6.7.0
ESXi build number:   8169922

FreeBSD vmx-debug 13.0-CURRENT FreeBSD 13.0-CURRENT r345863 GENERIC  amd64

vmx0: link state changed to UP
vmx0: <VMware VMXNET3 Ethernet Adapter> port 0x5000-0x500f mem
0xfd3fc000-0xfd3fcfff,0xfd3fd000-0xfd3fdfff,0xfd3fe000-0xfd3fffff irq 19 at
device 0.0 on pci4
vmx0: Using 512 tx descriptors and 256 rx descriptors
vmx0: Using 6 rx queues 6 tx queues
vmx0: failed to allocate 7 MSI-X vectors, err: 6 - using MSI
vmx0: Using an MSI interrupt
vmx0: Ethernet address: 00:53:00:00:00:00
vmx0: netmap queues/slots: TX 1/512, RX 1/512
vmx0: link state changed to UP


vmx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500     
options=e403bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 00:53:00:00:00:00
        inet 192.0.2.1 netmask 0xffffff00 broadcast 192.0.2.255
        media: Ethernet autoselect
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

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