Hi, I have two obsd machines running OpenBSD 4.9 STABLE and CARP for failover.
Each machine has 3 interfaces: sk1(external) sk0(internal) em0(sync) em0 has a direct cable connecting the two machines. Both machines use exactly the same dhcpd.conf file to serv IP addresses on sk0. I have set skip on em0 set skip on lo0 on both sides. I use dhcpd_flags="-y em0 -Y em0 sk0" For some reason, I think dhcpd is not synchronizing the leases. Although I see this kind of messages in the logs of both firewalls, I cannot see the packets being sent or received. dhcpd[13353]: sending DHCP_SYNC_LEASE for hw 00:26:e8:78:49:db -> ip a.b.c.d, start 1332327048, end 1332334248 But I see pfsync messages going through the em0 iface, like the one below: 07:53:55.380578 00:22:64:89:67:6a 01:00:5e:00:00:f0 0800 1486: 10.1.1.1 > 224.0.0.240: PFSYNCv6 len 1452 B B act UPD ST COMP count 17 B B ... (DF) [tos 0x10] (ttl 255, id 8912, len 1472) When I run route -n get 224.0.1.240, I get: route to: 224.0.1.240 destination: 224.0.0.0 mask: 240.0.0.0 interface: lo0 if address: 127.0.0.1 priority: 8 (static) flags: <UP,REJECT,DONE,STATIC> use B B B mtu B B expire 4249 B B 33200 B B B B 0 My questions are: 1) Why I cannot see the dhcpd sync packets using tcpdump -nevvi em0? 2) Is there a way to verify that they are in sync? Thanks for any help. Kind regards, Jose
