Change Monitoring IP address

[Bal Krishna Adhikari]

Hello All,

As BIND server periodically query root servers to check it's availability to Internet.
When Internet is down, I can't fetch the domains of my local exchange too.
We got one of the root servers in local exchange but I don't know if it's checks the availability of all servers ! 
BIND just stops serving DNS queries.

Can't I set the root server availability to only one root server which is in my local exchange ?

Regards,
--------
Bal Krishna
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