Date: Mon, 31 Aug 2020 13:55:52 +0200 From: Michael Gmelin <freebsd@grem.de> To: Julien Cigar <julien@perdition.city> Cc: freebsd-net@freebsd.org Subject: Re: CARP over VLAN over LAGG Message-ID: <8A98D287-4202-493B-8515-4377740B126A@grem.de> In-Reply-To: <20200831083705.pvrjk4srdohlxklf@x1> References: <20200831083705.pvrjk4srdohlxklf@x1>
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> On 31. Aug 2020, at 10:37, Julien Cigar <julien@perdition.city> wrote: >=20 > =EF=BB=BFOn Fri, Aug 28, 2020 at 04:52:01PM +0200, Julien Cigar wrote: >> Hello, >>=20 >> I have a "highly available" router/firewall with the following >> configuration (1). Those are plugged in two 2930F (with VSF) using LACP. >> It works well, except that I have some weird issues with the CARP=20 >> demotion counter when I'm unplugging some interfaces involved in the=20 >> lagg/carp setup, for example if I unplug/replug igb0 and igb1 in this=20 >> case: >>=20 >> (dmesg): >> igb0: link state changed to DOWN >> igb1: link state changed to DOWN >> carp: demoted by 240 to 240 (send error 50 on vlan11) >> carp: 11@vlan11: MASTER -> BACKUP (more frequent advertisement received) >> vlan11: deletion failed: 3 >> igb1: link state changed to UP >> igb0: link state changed to UP >>=20 >> then the CARP status stays to BACKUP unless I demote the CARP demotion >> counter manually with: sudo sysctl net.inet.carp.demotion=3D-240: >>=20 >> (dmesg): >> carp: demoted by -240 to 0 (sysctl) >> carp: 11@vlan11: BACKUP -> MASTER (preempting a slower master) >>=20 >> I guess this is because it takes some time for lagg/lacp to converge and >> thus carp thinks that there is a problematic condition as it experiences >> problems with sending announcements.. >>=20 >> What it the best way to handle this? >=20 > I'm wondering if setting net.inet.carp.senderr_demotion_factor to "0" > could be a solution? Are there any downsides of setting this to "0" > instead of "240"? >=20 Sharing your pf.conf from both hosts could be helpful analyzing the issue. -m
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