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DNS routing

h-mulchandani
Level 1
Level 1

‎07-22-2004 02:34 PM - edited ‎03-02-2019 05:15 PM

Hi,

I have two links connecting to 2 different ISP's.With default static routing configured for both.Also 2 different class C subnets are available.

Curretly we are using the DNS servers of ISP's.

I would like to know what if any one of the link fails. Will my DNS resolution happen through the other ISP link. If yes what is the solution to it.

Please help!!

Heroo

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2 Replies 2

thisisshanky
Level 11
Level 11

‎07-22-2004 09:18 PM

You will be having atleast 2 DNS server IPs from each ISP. The best way to achieve DNS resolution in case of link failures is to use an internal DNS server (win2k or 2003) and have it forward DNS requests in a prioritised order to ISP 1 first and then to ISP 2 in case ISP1 link is down or if the DNS servers are not available.

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus
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h-mulchandani
Level 1
Level 1
In response to thisisshanky

‎08-02-2004 01:32 PM

Thanks

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