Sensei impacts the graphical traffic widget

[Darkopnsense]

hello mb,

Since upgrading to version 20.7 I have the OUT traffic graph widget.

When you stop sensei, the traffic graph widget works.

I have of course checked my statements on my different configurations.

Situation still valid in version 20.7.3

Regards,

French mother tongue.

[athurdent]

Seems to be related to Netmap. Zabbix Client is not getting any useful data from LAN (Sensei with Netmap) and WAN1 (Suricata in IPS mode) here, too.

[mb]

Does setting net.bpf.zerocopy_enable to 1 help?

From: https://docs.opnsense.org/troubleshooting/network.html

Use zero-copy for bpf(4) for faster processing, when not set (the default) packets will not be seen by bpf, which influences the traffic graphs for example.

[athurdent]

Just set

Code Select Expand

# sysctl net.bpf.zerocopy_enable=1
net.bpf.zerocopy_enable: 0 -> 1
but LAN (igb0) with Sensei in Netmap mode is still flatlining, Zabbix is not picking up traffic either.

[mb]

A reboot might be necessary to apply the setting before any services are started. Better to put in Misc -> Tunables so that this survives reboots.

[athurdent]

A reboot might be necessary to apply the setting before any services are started. Better to put in Misc -> Tunables so that this survives reboots.

Thanks, and sorry I failed to mention that. I had already tried that, too. No luck, as soon as Sensei starts, the igb interface flatlines.

[mb]

Hi @athurdent,

Thanks for the additional update.

This looks like netmap comes into the scene way earlier than iflib getting a chance to tap the packet for bpf(4) processing.

We'll look into that.

[athurdent]

@mb Great, thank you!  :)