Date: Mon, 27 Jul 2020 08:36:25 -0400 From: Joe Clarke <jclarke@marcuscom.com> To: Eugene Grosbein <eugen@grosbein.net> Cc: freebsd-stable@freebsd.org Subject: Re: Traffic "corruption" in 12-stable Message-ID: <1C16B9F2-73E2-4B0B-8A69-1A7E060E8D1B@marcuscom.com> In-Reply-To: <9d6dc414-2866-e6c8-6b66-22af23efc728@grosbein.net> References: <9FAE54DE-F409-4A53-B91E-59AE52A86513@marcuscom.com> <9d6dc414-2866-e6c8-6b66-22af23efc728@grosbein.net>
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> On Jul 27, 2020, at 01:00, Eugene Grosbein <eugen@grosbein.net> 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 Thanks for the suggestion. I should have mentioned I’ve been initializing these two interfaces since 11-stable with: ifconfig_vmx0="up mtu 9000 -tso -lro -vlanhwtso -rxcsum -txcsum -rxcsum6 -txcsum6 -tso4 -tso6 -vlanhwcsum” ifconfig_vmx1="DHCP -tso -lro -vlanhwtso -rxcsum -txcsum -rxcsum6 -txcsum6 -tso4 -tso6 -vlanhwcsum” And I’m running: FreeBSD namale.marcuscom.com 12.1-STABLE FreeBSD 12.1-STABLE NAMALE amd64 1201520 1201520 I most recently built this yesterday, but the previous kernel that exhibited the problem was built about a week ago. It had the fragment fixes for iflib.c. Joe > --- PGP Key : http://www.marcuscom.com/pgp.aschelp
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