On Tue, Jun 16, 2020 at 07:56:19PM +0000, Foster, Greg wrote: > HI Navdeep, > > Thanks for the information! I've integrated the changes and will be > testing more today. > > We have seen the LACP port flapping under different scenarios, most we > believe are traffic/load based. > > I did see the flapping unexpectedly when I just enabled LACP debug > (e.g., sysctl net.link.lagg.lacp.debug=1). Is this a known > problem?
No, I don't think so. The debug output goes to the console so it is relatively slow but it shouldn't cause any flaps directly. Regards, Navdeep > > Thanks > Greg > > -----Original Message----- > From: Navdeep Parhar <npar...@gmail.com> On Behalf Of Navdeep Parhar > Sent: Friday, June 12, 2020 7:51 PM > To: Foster, Greg <gfos...@panasas.com> > Cc: freebsd-net@freebsd.org > Subject: Re: How to Increase TX Queue Priority for LACP Packets > > On Fri, Jun 12, 2020 at 11:47:41PM +0000, Foster, Greg wrote: > > FreeBSD Networkers, > > > > We are seeing LACP port flapping on our FreeBSD 10.4/12.1 systems > > under different conditions. > > > > Can someone explain or point me to the information on how to queue > > the LACP packets to a higher priority queue ? > > > > We are using the Chelsio T580-LP-CR adapter/cxgbe driver. The > > Cheslio NICs have 8 TX/RX queues each, but I don't know how to > > explicitly put the LACP packets in the higher priority TX queue. > > > > I've read about PF/ALTQ and think this may be overkill our needs, > > and was wondering if there was a simpler method. > > This is cxgbe specific but that's what you're using so it'll do. > > Add "hw.cxgbe.rsrv_noflowq=1" to your /boot/loader.conf. That > reserves one tx queue for non-RSS traffic (like ARP, LACP). You might > also want to increase the number of tx queues to compensate for the > one that's now reserved. Use "hw.cxgbe.ntxq=9" for that. The ntxq > knob might be different on 10.4 but the man page matching the driver > should have its exact name. > > Regards, > Navdeep > _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
