BGP 2 subnet 2 providers

RouterOS Beginner Basics
1

Hi,

We have two /24 subnets, one ASN and two IP transit providers.

  1. Is there any problem with the routing in the internet if we advertise one subnet to ISP1 and advertise the other subnet to ISP2?
  2. Can we do failover if one of the link to any ISP goes down?

Thanks in advance.

2

You can use local preference attribute to point the exit from your AS. Also you can artificially worsen AS-Path to both of your network using AS-Path prepend.

For example:

network 10 and network 20

10 goes via ISP 1 and 20 goes via ISP2

Use local pref 200 in your AS for network 10 to ISP1 and as-path prepend 3 for network 10 to ISP2.
Do by analogy with another.

https://wiki.mikrotik.com/wiki/Manual:Simple_BGP_Multihoming#Load_sharing_setup