resilient links scripting

RouterOS Scripting
1

Hi,

I have two backhaul links. Ether 2 is my primary link and Ether 3 is my backup with Ether 1 being my internal network.

At present when Ether 2 fails for more than 30 secs, Ether 3 will automatically enable and will only disable when Ether 2 comes back online.
It works a treat but because I use two different providers, I have an issue with DNS.
I currently operate a manual DNS redirection when my link fails but it is not automatic.
Is there a script where I can automatically enable my DNS redirection rule when Ether2 fails and then disable the rule when Ether 2 is back.

Thanks

Paul

2

To your current script which enables ether3 add one more script line that will change DNS redirect rule.

3

Many thanks for your reply.

Would it be possible for someone to show an example of what such a script would look like.

Thanks

4

I had a problem like yours and i solved it using opendns dns servers.

kindly regards,

Jorge Amaral