[Samba] process_lanman_packet: Discarding datagram from IP 192.168.100.29. Source name STORAGE7<00> is one of our names !

[Torkil Svensgaard]

Hi

I have a bunch of FreeNAS servers and a TrueNAS HA server all spamming 
the logs with these messages every minute about their own source name 
(examples below).

These boxes are on two physically separate networks, and I find it 
unlikely both networks should have some sort of undetected loop. Any 
ideas on how to debug this? Samba version is 4.1.18.

FreeNAS box on network A
"
Jan  5 23:17:43 storage7 nmbd[18901]: [2016/01/05 23:17:43.054231,  0] 
../source3/nmbd/nmbd_packets.c:1174(process_lanman_packet)
Jan  5 23:17:43 storage7 nmbd[18901]:   process_lanman_packet: 
Discarding datagram from IP 192.168.100.29. Source name STORAGE7<00> is 
one of our names !
"

TrueNAS active node network A
"
Jan  5 23:17:43 storage8 nmbd[21114]: [2016/01/05 23:17:43.052040,  0] 
../source3/nmbd/nmbd_packets.c:1174(process_lanman_packet)
Jan  5 23:17:43 storage8 nmbd[21114]:   process_lanman_packet: 
Discarding datagram from IP 192.168.100.36. Source name TRUENAS1<00> is 
one of our names !
"

FreeNAS box on network B
"
Jan  5 23:17:32 storage4 nmbd[34068]: [2016/01/05 23:17:32.086480,  0] 
../source3/nmbd/nmbd_packets.c:1174(process_lanman_packet)
Jan  5 23:17:32 storage4 nmbd[34068]:   process_lanman_packet: 
Discarding datagram from IP 172.21.140.17. Source name STORAGE4<00> is 
one of our names !
"

Thanks,

Torkil