DNS Failover when one is down (Active Directory)

[Pingusman]

Hi,

We have this architecture :

- Primary Domain Controller + DNS (1.1)
- Secondary Domain Controller + DNS (1.2)
- Roaming Profiles on a linux server with samba (1.3)

The two domain controller are master, for authentification it's working well
But we have a problem with the linux server, when the primary server is down, the linux server does'nt work

DNS on 1.3 :
Primary 1.1
Secondary 1.2

Example of a dns entry

DOMAIN.COM
* A 192.168.1.1
* A 192.168.1.2

This entry return randomly the primary or the secondary ip

When the primary is down :

On Windows 7 :

- First 2/3 min, ping domain.com return 1.1 or 1.2, so not working very well
- After 2/3min , ping domain.com always return 1.2 so it's working well

On Debian :

- ping domain.com always return a random ip, so it's not working good


Is there a configuration to make linux works as windows do ?
Something like filtering not responding ip in the dns request answer ?

Thanks

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