As reported by our user: When a samba server is running as a wins server, the wins server remembers IP addresses of the server, which have since been deleted. Restarting samba, and using "net cache flush" does not cure the problem. Clients intermittently recieve stale data, and fail to contact the server. To reproduce: 1. Create a samba server with multiple IP addresses on a local subnet .e.g. 192.168.0.1, 192.168.1.1 2. Start samba server with 'wins support = yes' 3. net lookup <server-name> 4. net cache list - both IP addresses should be listed 5. /etc/init.d/samba stop 6. ip addr del 192.168.1.1/24 dev eth0 7. /etc/init.d/samba start 8. net lookup <server-name> 9. net cache list - both IP addresses are still listed (Incorrectly) I reproduced this: root@mykerinos:/var/tmp/test> ifconfig weth_i weth_i Link encap:Ethernet HWaddr 00:12:f0:aa:6a:8b inet adr:192.168.1.3 Bcast:192.168.1.255 Masque:255.255.255.0 adr inet6: fe80::212:f0ff:feaa:6a8b/64 Scope:Lien UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:711312 errors:0 dropped:0 overruns:0 frame:0 TX packets:430433 errors:0 dropped:0 overruns:0 carrier:1 collisions:0 lg file transmission:1000 RX bytes:618309852 (589.6 MiB) TX bytes:71118951 (67.8 MiB) Interruption:17 Adresse de base:0xe000 Mémoire:dfcff000-dfcfffff root@mykerinos:/var/tmp/test> ip addr add 192.168.1.30/24 dev weth_i root@mykerinos:/var/tmp/test> net lookup mykerinos 192.168.1.3 root@mykerinos:/var/tmp/test> net cache list Key: NBT/MYKERINOS#20 Timeout: 20:15:54 Value: 192.168.1.3:0,192.168.1.30:0 root@mykerinos:/var/tmp/test> /etc/init.d/samba stop * Stopping Samba daemons [ ok ] root@mykerinos:/var/tmp/test> ip addr del 192.168.1.30/24 dev weth_i root@mykerinos:/var/tmp/test> /etc/init.d/samba start * Starting Samba daemons [ ok ] root@mykerinos:/var/tmp/test> net lookup mykerinos 192.168.1.3 root@mykerinos:/var/tmp/test> net cache list Key: NBT/MYKERINOS#20 Timeout: 20:15:54 Value: 192.168.1.3:0,192.168.1.30:0
I came over similar problem - samba BDC was unable to contact samba PDC, because it tried to contact nonexistent ip address. Resolution was following: first, add ip of PDC to /etc/samba/lmhosts as DOMAINNAME#1B on BDC. Then disable bcast name resolution in both smb.conf and flush caches on DCs with net cache flush. The reason for disabling bcast resolution is that windows workstations do caching also. So the data cannot expire for real, they are just moved around forever.