dynamic update not working consistently

[Simon Hobson]

Jiann-Ming Su wrote:

>Does the actual subnet declaration make a difference in how dynamic 
>dns behaves?

It can do - as in both subnets need to have their DNS server 
correctly declared, or automatically determinable.

If your DNS is all set up correctly, and you don't use signed 
updates, then the DHCP server will determine the server itself (IIRC 
it looks up the SOA record for the domain and uses the master defined 
there). If you use signed updated, or there is anything wrong with 
your DNS, then you need to define every zone that your will be 
updating.

Looking back at your original message, I now see that you appear to 
be using 10.10.8.0/21 and 10.10.96.0/22 for your clients, and your 
server is at 172.30.8.4.

Your dhcp server must know the master DNS for the zones "test.bogus" 
(assuming test.bogus is used for both subnets); and 
x.10.10.in-addr.arpa (where x is 8, 9, 10, 11, 12, 13, 14, 15, 96, 
97, 98, 99) OR just 10.10.in-addr.arpa if you use one big zone for 
10.10.x.y.

It might help if you post your dhcp config file (obviously you can 
replace security keys with 'xxxx' and so on).

-- 
Simon Hobson

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