Your system is probably not configured for multicast. Try 'route delete 224/4'. If it helps, set multicast_host=YES in rc.conf.local and reboot. This should probably be mentioned in the manual for dhcpd/spamd.
This isn't required for pfsync/carp and some of the routing daemons which specifically set an interface using IP_MULTICAST_IF. On 2012-03-21, Jose Fragoso <[email protected]> wrote: > 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
