Date: Sat, 10 Oct 2020 18:16:24 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 250257] carp - preempt not working when net.inet.carp.demotion is not zero Message-ID: <bug-250257-227@https.bugs.freebsd.org/bugzilla/>
index | next in thread | raw e-mail
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250257 Bug ID: 250257 Summary: carp - preempt not working when net.inet.carp.demotion is not zero Product: Base System Version: 12.1-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: ozkan.kirik@gmail.com I'm using FreeBSD 12.1-STABLE. carp works as expected while all cables are plugged (demotion=0). But when cables unplugged from one interface from each host (demotion=240 both), after unplugging one more cable from Host A, preempt dont work. so some interfaces left MASTER some of BACKUP at Host B. Host A: Master igb0 - vhid 226 - advskew 0 - carp: INIT - unplugged igb1 - vhid 227 - advskew 0 - carp: MASTER - plugged igb2 - vhid 228 - advskew 0 - carp: INIT - unplugged both hosts igb3 - vhid 229 - advskew 0 - carp: MASTER - plugged net.inet.carp.preempt=1 net.inet.carp.demotion=480 # ifconfig igb1 igb1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=e527bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6> ether 0c:c4:7a:33:d0:6d inet6 fe80::ec4:7aff:fe33:d06d%igb1 prefixlen 64 scopeid 0x2 inet 10.0.0.2 netmask 0xffffff00 broadcast 10.10.99.255 inet 10.0.0.1 netmask 0xffffff00 broadcast 10.10.99.255 vhid 227 groups: lanlar carp: MASTER vhid 227 advbase 1 advskew 0 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> ------------------------------------------------------------------------- Host B: Backup igb0 - vhid 226 - advskew 100 - carp: MASTER - plugged igb1 - vhid 227 - advskew 100 - carp: BACKUP - plugged igb2 - vhid 228 - advskew 100 - carp: INIT - unplugged both hosts igb3 - vhid 229 - advskew 100 - carp: BACKUP - plugged net.inet.carp.preempt=1 net.inet.carp.demotion=240 # ifconfig igb1 igb1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=e527bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6> ether 0c:c4:7a:33:d0:6d inet6 fe80::ec4:7aff:fe33:d06d%igb1 prefixlen 64 scopeid 0x2 inet 10.0.0.3 netmask 0xffffff00 broadcast 10.10.99.255 inet 10.0.0.1 netmask 0xffffff00 broadcast 10.10.99.255 vhid 227 groups: lanlar carp: MASTER vhid 227 advbase 1 advskew 0 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> ------------------------------------------------------------------------- This behaviour is wrong. Host B should preempt to become master. In this condition the Host A should announce advskew=480 but announcing as advskew=240. on Host B; tcpdump -ni igb1 -T carp carp shows that: 21:10:31.394012 IP 10.0.0.2 > 224.0.0.18: CARPv2-advertise 36: vhid=227 advbase=1 advskew=240 authlen=7 counter=248643719741960624 As seen above, Host A is still announcing as advskew=240. There is something wrong when net.inet.carp.demotion from 240 to 480, announcement cannot switch to 480. -- You are receiving this mail because: You are the assignee for the bug.help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-250257-227>