Jan 302018

If you want to push routes to your client, the easiest way to do so would be adding a classless static route (DHCP option 121) as defined in RFC 3442. Every router has their way of setting these but usually they have one thing in common – you must do so manually. And yes, if you make a single mistake, your Internet connectivity will be lost.

Issue of easy entry has bothered me for long enough to actually do something about it. Below find classless static route option calculator. Just enter routes you want (as long as number is less than 5) and you will get its hexadecimal representations.

Network Gateway
DHCP option 121:
Mikrotik code:

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