Date: Fri, 28 Aug 2020 16:52:01 +0200 From: Julien Cigar <julien@perdition.city> To: freebsd-net@freebsd.org Subject: CARP over VLAN over LAGG Message-ID: <20200828145201.ezo6zbatmdmcgvzp@x1>
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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? 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.
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