Dear All,
Please help me. I am new to Mikrotik. I just bought Mikrotik Router RB1200 I want to start using it. The following is my senario
I have a point to point link from the ISP and through that I have to route my other global IPs and all the computers that will be connected should get Internet connection, two ports should do NAT.
Apart from that I also have another link from different ISP (Backup link) When the primary link go down this should take up.

Please help me on what I can do. Step by step instructions if possible.

Thanks in advance

Karoma

Hello,

Add simple NAT (chain: src-nat, action: masquerade)
Then add in IP > Routes, two default gateways, but change distance (eg. primary link Distance: 1, secondary link Distance: 10).
When primary gateway is unreachable, routerboard will automaticaly use gateway with distance 10, until primary is reachable again...

Thank you for the reply, I will try to add the routes and NAT once I get back to my router and post the feedback here.

See fewi's recent beginners setup guide. It's very detailed and covers some NAT basics: http://wiki.mikrotik.com/wiki/How_to_co ... ome_router

The reference page is also quite useful: http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/NAT