Tools for detecting a dead server and deactivating the corresponding name entry

[Christoph Wagner]

Hi,

In normal operation the name server resolves using round robin between the multiple entries.
I want a solution to check if a server is ok and if one of them is down the name server should stop resolving this address. 

PS: I am using Bind8 solaris and bind8 nt4.

Anybody who knows a solution?

Regards Chris