Date: Mon, 31 Aug 2020 10:37:05 +0200 From: Julien Cigar <julien@perdition.city> To: freebsd-net@freebsd.org Subject: Re: CARP over VLAN over LAGG Message-ID: <20200831083705.pvrjk4srdohlxklf@x1> In-Reply-To: <20200828145201.ezo6zbatmdmcgvzp@x1>
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On Fri, Aug 28, 2020 at 04:52:01PM +0200, Julien Cigar wrote: > Hello, > > 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 > demotion counter when I'm unplugging some interfaces involved in the > lagg/carp setup, for example if I unplug/replug igb0 and igb1 in this > case: > > (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 > > then the CARP status stays to BACKUP unless I demote the CARP demotion > counter manually with: sudo sysctl net.inet.carp.demotion=-240: > > (dmesg): > carp: demoted by -240 to 0 (sysctl) > carp: 11@vlan11: BACKUP -> MASTER (preempting a slower master) > > 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.. > > What it the best way to handle this? 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"? > > Thanks, > Julien > > (1) https://gist.github.com/silenius/577606b596ff1d220bbfd9956d05baef > > -- > Julien Cigar > Belgian Biodiversity Platform (http://www.biodiversity.be) > PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 > No trees were killed in the creation of this message. > However, many electrons were terribly inconvenienced. > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" -- Julien Cigar Belgian Biodiversity Platform (http://www.biodiversity.be) PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 No trees were killed in the creation of this message. However, many electrons were terribly inconvenienced.home | help
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