Hi List, i am using two machines in our network as DHCP servers and want to synchronise them via the -Y and -y switches. After a while, they get out of sync and have slight differences in their leasefiles. After investigating a bit, i activated the sync_debug mode in /usr/src/usr.sbin/dhcpd/sync.c by setting sync_debug != 0:
int sync_debug = 1; recompiled dhcpd and installed it. Watching the logs shows, that the messages aren't received properly: on sparc64: Jun 29 13:42:03 sparci dhcpd[23673]: DHCPREQUEST for 192.168.1.144 from 00:23:12:06:d6:34 via 192.168.1.242 Jun 29 13:42:03 sparci dhcpd[23673]: DHCPACK on 192.168.1.144 to 00:23:12:06:d6:34 via 192.168.1.242 Jun 29 13:42:03 sparci dhcpd[23673]: sending DHCP_SYNC_LEASE for hw 00:23:12:06:d6:34 -> ip 192.168.1.144, start 1340970122, end 1343562122 Jun 29 13:42:03 sparci dhcpd[23673]: sending sync message to 192.168.1.240 (192.168.1.240) Jun 29 13:42:03 sparci dhcpd[23673]: sending sync message to 192.168.1.244 (192.168.1.244) Jun 29 13:42:03 sparci dhcpd[23673]: 192.168.1.244(sync): truncated or invalid packet Jun 29 13:42:03 sparci dhcpd[23673]: DHCPREQUEST for 192.168.1.144 from 00:23:12:06:d6:34 via 192.168.1.242 Jun 29 13:42:03 sparci dhcpd[23673]: DHCPACK on 192.168.1.144 to 00:23:12:06:d6:34 via 192.168.1.242 Jun 29 13:42:03 sparci dhcpd[23673]: sending DHCP_SYNC_LEASE for hw 00:23:12:06:d6:34 -> ip 192.168.1.144, start 1340970123, end 1343562123 Jun 29 13:42:03 sparci dhcpd[23673]: sending sync message to 192.168.1.240 (192.168.1.240) Jun 29 13:42:03 sparci dhcpd[23673]: sending sync message to 192.168.1.244 (192.168.1.244) on amd64 (virtual): Jun 29 13:42:03 infra0 dhcpd[21062]: DHCPREQUEST for 192.168.1.144 from 00:23:12:06:d6:34 via 192.168.1.242 Jun 29 13:42:03 infra0 dhcpd[21062]: DHCPACK on 192.168.1.144 to 00:23:12:06:d6:34 via 192.168.1.242 Jun 29 13:42:03 infra0 dhcpd[21062]: sending DHCP_SYNC_LEASE for hw 00:23:12:06:d6:34 -> ip 192.168.1.144, start 1340970122, end 1343562122 Jun 29 13:42:03 infra0 dhcpd[21062]: sending sync message to 192.168.1.240 (192.168.1.240) Jun 29 13:42:03 infra0 dhcpd[21062]: sending sync message to 192.168.1.241 (192.168.1.241) Jun 29 13:42:03 infra0 dhcpd[21062]: 192.168.1.241(sync): truncated or invalid packet Jun 29 13:42:03 infra0 dhcpd[21062]: 192.168.1.241(sync): truncated or invalid packet on amd64 (real hardware): Jun 29 13:42:03 infra1 dhcpd[11844]: 192.168.1.244(sync): truncated or invalid packet Jun 29 13:42:03 infra1 dhcpd[11844]: 192.168.1.241(sync): truncated or invalid packet Jun 29 13:42:03 infra1 dhcpd[11844]: 192.168.1.241(sync): truncated or invalid packet These are logentries from three machines, to rule out anything is related to the second host running on virtual hardware. The dhcpd syncs are started in unicast mode with "-Y 192.168.1.244 -Y 192.168.1.240 -y 192.168.1.241" (on the sparc64, and vice versa on the other hosts). Multicast syncs don't change the situation. Is there anything, i can do about the truncated messages to get this working as it should? marc
