On 09:50:51 Nov 14, Eugene wrote: > Hello freebsd, > > > We have two FreeBSD boxes, each one has 4 CARP interfaces in preempt > mode, without arp balancing. > > Backup without any reason preempts Master and after a while (an hour > or two) it becomes Backup again. > When Backup becomes Master on Master box > net.inet.carp.suppress_preempt: 1, but all interfaces are up and > seemed to work properly. > > > Is there any ways to debug this issue? > > > Additional info: > > #uname -v > FreeBSD 6.1-RELEASE-p7 > > Master: > # grep carp /var/log/messages > Nov 14 01:50:59 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 01:52:30 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 02:43:55 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 02:59:12 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 03:26:13 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 03:26:32 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 04:58:39 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 05:53:27 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 06:01:12 atlas kernel: carp3: MASTER -> BACKUP (more frequent > advertisement received) > Nov 14 06:03:36 atlas kernel: carp2: BACKUP -> MASTER (preempting a slower > master) > Nov 14 06:03:36 atlas kernel: carp0: BACKUP -> MASTER (preempting a slower > master) > Nov 14 06:03:36 atlas kernel: carp1: BACKUP -> MASTER (preempting a slower > master) > Nov 14 06:03:38 atlas kernel: carp3: BACKUP -> MASTER (preempting a slower > master) > > Master & Backup (in normal state) > #sysctl -a | grep "net.inet.carp." > net.inet.carp.allow: 1 > net.inet.carp.preempt: 1 > net.inet.carp.log: 2 > net.inet.carp.arpbalance: 0 > net.inet.carp.suppress_preempt: 0 > > all NICs - 3Com 3c905C-TX > > Master: > #ifconfig | grep -A2 carp > carp0: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 10.1.1.3 netmask 0xffffff00 > carp: MASTER vhid 1 advbase 1 advskew 10 > carp1: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 10.1.2.3 netmask 0xffffff00 > carp: MASTER vhid 2 advbase 1 advskew 10 > carp2: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 10.1.3.3 netmask 0xffffff00 > carp: MASTER vhid 3 advbase 1 advskew 10 > carp3: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 10.1.4.3 netmask 0xfffffff8 > carp: MASTER vhid 4 advbase 1 advskew 10 > > Backup > #ifconfig |grep -A2 carp > carp0: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 10.1.1.3 netmask 0xffffff00 > carp: BACKUP vhid 1 advbase 1 advskew 20 > carp1: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 1.1.2.3 netmask 0xffffff00 > carp: BACKUP vhid 2 advbase 1 advskew 20 > carp2: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 10.1.3.3 netmask 0xffffff00 > carp: BACKUP vhid 3 advbase 1 advskew 20 > carp3: flags=49<UP,LOOPBACK,RUNNING> mtu 1500 > inet 10.1.4.3 netmask 0xfffffff8 > carp: BACKUP vhid 4 advbase 1 advskew 20 > > Master: > > #netstat -ni |grep carp > Name Mtu Network Address Ipkts Ierrs Opkts Oerrs > Coll > carp0 1500 <Link#12> 311894 1 5926852 0 > 0 > carp0 1500 10.1.1 10.1.1.3 42293866 - 263238 - > - > carp1 1500 <Link#13> 48653 1 5663615 0 > 0 > carp1 1500 10.1.2 10.1.2.3 153785957 - 0 - > - > carp2 1500 <Link#14> 48661 1 5663615 107 > 0 > carp2 1500 10.1.3/24 10.1.3.3 476782 - 0 - > - > carp3 1500 <Link#15> 48974 1 5663634 1155 > 0 > carp3 1500 10.1.4.3/ 10.1.4.3 6885622 - 0 - > - > > > Backup: > > #netstat -ni |grep carp > Name Mtu Network Address Ipkts Ierrs Opkts Oerrs > Coll > carp0 1500 <Link#12> 35221 0 6437 0 > 0 > carp0 1500 10.1.1 10.1.1.3 8699 - 0 - > - > carp1 1500 <Link#13> 35220 0 6438 0 > 0 > carp1 1500 10.1.2 10.1.2.3 86000 - 0 - > - > carp2 1500 <Link#14> 35221 0 6437 0 > 0 > carp2 1500 10.1.3/24 10.1.3.3 0 - 0 - > - > carp3 1500 <Link#15> 35190 0 6443 23 > 0 > carp3 1500 10.1.4.3/ 10.1.4.3 958 - 0 - > - > > > Thanks in advance!
I could be talking nonsense but still... Have you tried adjusting the "advskew" and "advbase" parameters? Another thing. Are the NICs reliable? Have you tried with a different NIC? Looks like you don't have a faulty NIC here. So it could be the other possibility. Thanks. regards, Girish _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
