LACP LAGG + Suricara

[dave]

If you've got a LAGG interface, would you run Suricata on the parent interfaces in promisc mode, or the LAGG in promisc mode?

[mimugmail]

Shouldnt it be on lagg without promisc when not using vlans?

[franco]

I think running on LAGG is the way to going since we have native support for it, but Murat et al would know best...


Cheers,
Franco

[dave]

I am using vlans.
Judging from top and Suricata's logs it's filtering the parent int's.  Also uses a lot less CPU time compared to running on it on the LAGG.
However, I was torrenting (Ubuntu... obviously) and the LAGG collapsed and OPNSense died, had to cycle the power.
I've look through the logs but, tbh, nothing stood out; but i'm not sure what words to filter with / where to start.
I'm running the ET Pro Tele rule-sets, but i've only got a few enabled.

[dave]

update on this.  my internet connection keeled over just now.  logged in to the GUI to find a huge memory leak, so had to cycle the power as even a reboot via serial wasnt working.

loggeg back in and thought i'd try switching Suricata from the igb's to lagg0 and found i can reliable get OPNSense to completly die within a minute with Suricata on the lagg.

i've got a copy of Putty's output if anyone's interested.

[mimugmail]

If you use VLANs and LAGG then I would go for selecting each vlan without promisc