I have a Netscreen Firewall connected to the Internet Backbone
I’d like to use My Microtik to connect to the Internet.
I want to have Port 3 on Microtik go to The Internet, and Port 4 connect directly to the Netscreen Wan Port.
Problem is, I am already using port1 on my private network. And Port 2 uses port 1 as it’s default gateway.
Goes Like this.
Office Network 192.168.1.0/24 on Port 4… All Ip’s Nat to the same address assigned to Port 2
Problem is, how do I get the router to split in two pieces. I basically want to be able to use Port 2 as the default gateway for port 1, and Use Port 3 as the default gateway for everything else. Problem now is that I can’t get both to work as a default gateway.
You can only have ONE DEFAULT gateway, being uhm.. the default!
You have several options though.
Use source/policy routing where you route certain “from” addresses to a certain gateway. (Eg your more expensive users are routed over your better quality/more expensive bandwidth)
Loadbalance between multiple ISP’s using ECMP (I do not recommend this)
Write a fail-over script for if ISP1 goes down, the default gateway will be changed to ISP2 until ISP1 is online again (there’s a few examples on the forum)
Use destination routing. Here you route certain sites over X ISP. (These are usually used when a certain upstream ISP provide better speed/latency to certain sites)