I have now tried to change the carp netmask to /32 on the one interface that shares subnet (management), changed advskew to 20 on master and 80 on slave. But ping loss still persist (see bottom of this mail).
I could try to set the carpdemote higher on the slave, but what then when/if the master actually goes down? >> CARP and nothing else. >>> I have no idea about a possible specific reason for packet loss, though. >>> >> Snippet from: Robert Blacquiere <[email protected]> >>> Just a quick thought as em devices are emulated on kvm did you try >>> disableling hw offloading on the interfaces? I had some similair issue >>> with a vps pings seem to work but other traffic had drops. >> I haven't tried to disable HW offload, but do you think it could be a >> problem, when it worked fin under older versions of OpenBSD? >> >> Med Venlig Hilsen / Best Regards >> Henrik Dige Semark >> >> >> > I had some issues with vps with em interfaces and pseudo hw offloading. > Now I never use offloading on vps and have not encountered these strange > things like packet drop or icmp work but tcp/udp fails and carp strange > hickups. Also encountered issue with multicast on juniper in combination > with numbered management vlan on the default vlan. Some where in juniper > they got silenced. > > Regards > > Robert > @Robert: What exactly do you turn off, and how? Information: # ifconfig em0 em0: flags=8b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500 lladdr a8:8d:35:55:7d:5f description: Management index 1 priority 0 llprio 3 media: Ethernet autoselect (1000baseT full-duplex) status: active inet 192.168.245.2 netmask 0xffffff00 broadcast 192.168.245.255 inet6 fe80::24e8:4c63:629c:3d53%em0 prefixlen 64 scopeid 0x1 inet6 2001:470:1b6a:45::2 prefixlen 64 # ifconfig carp1 carp1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 lladdr 00:00:5e:00:01:01 description: Management index 5 priority 15 llprio 3 carp: MASTER carpdev em0 vhid 1 advbase 1 advskew 20 groups: carp lan status: master inet 192.168.245.1 netmask 0xffffffff inet6 fe80::3c71:a9ea:18d8:872%carp1 prefixlen 64 scopeid 0x5 inet6 2001:470:1b6a:45::1 prefixlen 128 # ping -c 50 8.8.8.8 (From my laptop to Google DNS) --- 8.8.8.8 ping statistics --- 50 packets transmitted, 40 received, +10 errors, 20% packet loss, time 49158ms rtt min/avg/max/mdev = 7.046/7.370/10.165/0.517 ms # ping -c 50 192.168.245.2 (From my laptop to Server 1 em0) --- 192.168.245.2 ping statistics --- 50 packets transmitted, 50 received, 0% packet loss, time 49350ms rtt min/avg/max/mdev = 0.658/1.169/4.643/0.682 ms # ping -c 50 192.168.245.1 (From my laptop to carp1 (default gw)) PING 192.168.245.1 (192.168.245.1) 56(84) bytes of data. 64 bytes from 192.168.245.1: icmp_seq=1 ttl=255 time=0.766 ms 64 bytes from 192.168.245.1: icmp_seq=2 ttl=255 time=0.972 ms 64 bytes from 192.168.245.1: icmp_seq=3 ttl=255 time=1.18 ms 64 bytes from 192.168.245.1: icmp_seq=4 ttl=255 time=0.718 ms 64 bytes from 192.168.245.1: icmp_seq=5 ttl=255 time=0.816 ms 64 bytes from 192.168.245.1: icmp_seq=6 ttl=255 time=0.818 ms 64 bytes from 192.168.245.1: icmp_seq=7 ttl=255 time=0.964 ms 64 bytes from 192.168.245.1: icmp_seq=8 ttl=255 time=0.833 ms 64 bytes from 192.168.245.1: icmp_seq=9 ttl=255 time=0.839 ms 64 bytes from 192.168.245.1: icmp_seq=10 ttl=255 time=0.955 ms 64 bytes from 192.168.245.1: icmp_seq=11 ttl=255 time=1.62 ms 64 bytes from 192.168.245.1: icmp_seq=12 ttl=255 time=0.916 ms 64 bytes from 192.168.245.1: icmp_seq=13 ttl=255 time=0.785 ms 64 bytes from 192.168.245.1: icmp_seq=14 ttl=255 time=0.734 ms 64 bytes from 192.168.245.1: icmp_seq=15 ttl=255 time=1.99 ms *64 bytes from 192.168.245.1: icmp_seq=16 ttl=255 time=36.8 ms* 64 bytes from 192.168.245.1: icmp_seq=17 ttl=255 time=0.853 ms 64 bytes from 192.168.245.1: icmp_seq=18 ttl=255 time=1.19 ms 64 bytes from 192.168.245.1: icmp_seq=19 ttl=255 time=0.744 ms 64 bytes from 192.168.245.1: icmp_seq=20 ttl=255 time=1.89 ms 64 bytes from 192.168.245.1: icmp_seq=21 ttl=255 time=0.853 ms 64 bytes from 192.168.245.1: icmp_seq=22 ttl=255 time=1.78 ms 64 bytes from 192.168.245.1: icmp_seq=23 ttl=255 time=0.861 ms 64 bytes from 192.168.245.1: icmp_seq=24 ttl=255 time=1.15 ms 64 bytes from 192.168.245.1: icmp_seq=25 ttl=255 time=0.731 ms 64 bytes from 192.168.245.1: icmp_seq=26 ttl=255 time=0.701 ms 64 bytes from 192.168.245.1: icmp_seq=27 ttl=255 time=2.07 ms 64 bytes from 192.168.245.1: icmp_seq=28 ttl=255 time=1.07 ms *64 bytes from 192.168.245.1: icmp_seq=29 ttl=255 time=41.5 ms* 64 bytes from 192.168.245.1: icmp_seq=30 ttl=255 time=0.798 ms 64 bytes from 192.168.245.1: icmp_seq=31 ttl=255 time=1.65 ms 64 bytes from 192.168.245.1: icmp_seq=32 ttl=255 time=0.846 ms 64 bytes from 192.168.245.1: icmp_seq=33 ttl=255 time=0.782 ms 64 bytes from 192.168.245.1: icmp_seq=34 ttl=255 time=1.94 ms 64 bytes from 192.168.245.1: icmp_seq=35 ttl=255 time=0.841 ms 64 bytes from 192.168.245.1: icmp_seq=36 ttl=255 time=0.874 ms 64 bytes from 192.168.245.1: icmp_seq=37 ttl=255 time=0.819 ms 64 bytes from 192.168.245.1: icmp_seq=38 ttl=255 time=1.57 ms 64 bytes from 192.168.245.1: icmp_seq=39 ttl=255 time=1.79 ms 64 bytes from 192.168.245.1: icmp_seq=40 ttl=255 time=0.710 ms 64 bytes from 192.168.245.1: icmp_seq=41 ttl=255 time=0.762 ms *64 bytes from 192.168.245.1: icmp_seq=42 ttl=255 time=16.4 ms* 64 bytes from 192.168.245.1: icmp_seq=43 ttl=255 time=0.698 ms 64 bytes from 192.168.245.1: icmp_seq=44 ttl=255 time=0.776 ms 64 bytes from 192.168.245.1: icmp_seq=45 ttl=255 time=0.778 ms 64 bytes from 192.168.245.1: icmp_seq=46 ttl=255 time=1.43 ms 64 bytes from 192.168.245.1: icmp_seq=47 ttl=255 time=0.742 ms 64 bytes from 192.168.245.1: icmp_seq=48 ttl=255 time=0.773 ms 64 bytes from 192.168.245.1: icmp_seq=49 ttl=255 time=0.888 ms 64 bytes from 192.168.245.1: icmp_seq=50 ttl=255 time=0.699 ms --- 192.168.245.1 ping statistics --- 50 packets transmitted, 50 received, 0% packet loss, time 49458ms rtt min/avg/max/mdev = 0.698/2.877/41.590/7.745 ms My guess would be that it changes server in the three places marked with * and higher ping-times is seen -- Med Venlig Hilsen / Best Regards Henrik Dige Semark Mobil: +45 2633 1701
