Disable hardware TCP segmentation offload

gauthig

This box is checked but sysctl shows net.inet.tcp.tso: 1
So as per https://docs.netgate.com/pfsense/en/latest/hardware/tune.html#tso-lro I add net.inet.tcp.tso="0" to /boot/loader.conf.local and reboot, same results. net.inet.tcp.tso: 1 I add it to the tunables and same results.

Where else could this setting be forced

ESXI 7
VMXNET3 guest driver, vmware tools installed,
PF 22.05

stephenw10

@gauthig said in Disable hardware TCP segmentation offload:

https://docs.netgate.com/pfsense/en/latest/hardware/tune.html#tso-lro

Hmm, that maybe out of date. 'net.inet.tcp.tso' is a sysctl as mentioned, not a loader variable (some things can be set in both):

[22.05-RELEASE][admin@4100-2.stevew.lan]/root: sysctl net.inet.tcp.tso
net.inet.tcp.tso: 1
[22.05-RELEASE][admin@4100-2.stevew.lan]/root: sysctl net.inet.tcp.tso=0
net.inet.tcp.tso: 1 -> 0
[22.05-RELEASE][admin@4100-2.stevew.lan]/root: sysctl net.inet.tcp.tso
net.inet.tcp.tso: 0

So add it as a System Tunable.

However even with that enabled globally you should see it disabled for the NICs:

ix3: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=e138bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,RXCSUM_IPV6,TXCSUM_IPV6>
	capabilities=f53fbb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,NETMAP,RXCSUM_IPV6,TXCSUM_IPV6>

Steve

gauthig

@stephenw10 Thanks for the hint, it could be set anywhere. So I looked at all the loader configs that I do not touch and found it in loader.conf

So I removed it from there, the tunables, and the file I normally edited loader.conf.local and just left the check mark on the advanced networking page. It worked.

But a whole new question raised. I do not touch the loader.conf file and it seems very strange to my especially since it had 12 duplicate entries. What could have done this? Only thing I can think of is two years of upgraded versions and maybe I need a fresh install.

Here it is:
kern.cam.boot_delay=10000
kern.ipc.nmbclusters="1000000"
kern.ipc.nmbjumbop="524288"
kern.ipc.nmbjumbo9="524288"
opensolaris_load="YES"
zfs_load="YES"
kern.geom.label.gptid.enable="0"
kern.geom.label.disk_ident.enable="0"
kern.geom.label.disk_ident.enable="0"
kern.geom.label.gptid.enable="0"
opensolaris_load="YES"
zfs_load="YES"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
net.link.ifqmaxlen="128"
autoboot_delay="3"
vm.pmap.pti="0"
net.link.ifqmaxlen="128"

stephenw10

Mmm, it's a known issue. It's ugly but harmless.

You shouldn't ever manually edit the loader.conf file normally but you can remove the duplicates.
Any loader value you need to set or unset should always be put in loader.conf.local.

Steve