[Pkg-utopia-maintainers] Bug#854343: network-manager: The search	domain string in resolv.conf is being duplicated leading to	problems with DNS
    Martin Haaß 
    martinhaass at gmx.net
       
    Thu Feb  9 10:31:19 UTC 2017
    
    
  
Same behavior happens here.
Is it possible that multiple search domain entries in the dhcp packet 
trigger this problem? So instead of one entry being written twice it is 
two entries being concatenated without a newline and an additional 
'search' keyword at the start of the line.
Following is a wireshark trace of our DHCP ACK. There are two search 
domain entries (Option 3) due to two name server entries.
Cheers,
  Martin
---------------- snip ------------------------
Bootstrap Protocol (ACK)
     Message type: Boot Reply (2)
     Hardware type: Ethernet (0x01)
     Hardware address length: 6
     Hops: 0
     Transaction ID: 0x34e7e163
     Seconds elapsed: 0
     Bootp flags: 0x0000 (Unicast)
     Client IP address: 0.0.0.0
     Your (client) IP address: 192.168.0.43
     Next server IP address: 10.49.24.25
     Relay agent IP address: 0.0.0.0
     Client MAC address: Dell_50:03:a7
     Client hardware address padding: 00000000000000000000
     Server host name not given
     Boot file name: netboot/lpxelinux.0
     Magic cookie: DHCP
     Option: (53) DHCP Message Type (ACK)
     Option: (58) Renewal Time Value
     Option: (59) Rebinding Time Value
     Option: (51) IP Address Lease Time
     Option: (54) DHCP Server Identifier
     Option: (1) Subnet Mask
     Option: (28) Broadcast Address
     Option: (3) Router
         Length: 4
         Router: 192.168.0.6
     Option: (15) Domain Name
         Length: 11
         Domain Name: company.local
     Option: (6) Domain Name Server
     Option: (28) Broadcast Address
     Option: (3) Router
         Length: 4
         Router: 192.168.0.6
     Option: (15) Domain Name
         Length: 11
         Domain Name: company.local
     Option: (6) Domain Name Server
     Option: (44) NetBIOS over TCP/IP Name Server
     Option: (42) Network Time Protocol Servers
     Option: (252) Private/Proxy autodiscovery
     Option: (255) End
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