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Senior Systems Engineer
Asked: 2010-11-23 05:39:52 +0800 CST

DHCP server not updating DNS server after assigning IP address?

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I'm having mysterious issue that confused me for such a long time till now, I've got one DC which acted as DNS and DHCP as well.

However it is successfully giving out IP address to all IP enabled device and machine but when updating the DNS entry, only the Windows machine (workstations and server) gets their IP registered in the DNS server, therefore i cannot ping and access the other Linux machine apart from using IP address only.

restarting the DNS (plus RELOAD the entry) and DHCP services doesn't help at all and also entering the DHCP assigned IP address into the DNS server caused more problem since the address is assigned to different host already by DHCP but not gets updated in the DNS server (only to non-windows machine).

If anyone know how to diagnose and help me solve this problem that'd be very great helps.

Thanks.

domain-name-system dhcp

2 Answers

  1. make sure your DHCP server is configured to dynamically update DNS on behalf of clients (DHCP Server properties, DNS tab)

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  2. Check that your non-windows dhcp clients send out their hostname to the server.

    Perform a packet capture (wireshark) on the client or the server (easier on the client, less packets) to verify this hypothesis.

    If the client is not sending its hostname to the dhcp server, it has no way to update the dns zone.

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