On 27/7/20 3:00 pm, Eugene Grosbein wrote:
27.07.2020 5:16, Joe Clarke wrote:
About two weeks ago, I upgraded from the latest 11-stable to the latest
12-stable. After that, I periodically see the network throughput come to a
near standstill. This FreeBSD machine is an ESXi VM with two interfaces. It
acts as a router. It uses vmxnet3 interfaces for both LAN and WAN. It runs
ipfw with in-kernel NAT. The LAN side uses a bridge with vmx0 and a tap0 L2
VPN interface. My LAN side uses an MTU of 9000, and my vmx1 (WAN side) uses
the default 1500.
Besides seeing massive packet loss and huge latency (~ 200 ms for on-LAN ping
times), I know the problem has occurred because my lldpd reports:
Jul 26 15:47:03 namale lldpd[1126]: frame too short for tlv received on bridge0
And if I turn on ipfw verbose messages, I see tons of:
Jul 26 16:02:23 namale kernel: ipfw: pullup failed
This leads to me to believe packets are being corrupted on ingress. I’ve
applied all the recent iflib changes, but the problem persists. What causes it,
I don’t know.
The only thing that changed (and yes, it’s a big one) is I upgraded to
12-stable. Meaning, the rest of the network infra and topology has remained
the same. This did not happen at all in 11-stable.
I’m open to suggestions.
First, try: ifconfig $ifname -rxcsum -txcsum
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And possibly " -vlanhwtso -tso4" as well.
Graham
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