Mikrotik - How to set routes -

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i using mikrotik dns server , main router. have 2 dns records, x.x.x.1 , x.x.x.2 mail server mail.example.com , trying find solution when first server down , mikrotik can automatically route second server. me that.

you can use netwatch function: watch x.x.x.1, , when it's down, modify dns static record x.x.x.2. use small ttl values, 1 minute.

/tool netwatch add host=8.8.8.8 down-script="/ip dns static set [ find name=mail.xx.com ] address=x.x.x.2 ttl=30s "   up-script="/ip dns static set [ find name=mail.xx.com ] address=x.x.x.1 ttl=30s "

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