I’am setup like in this article http://wiki.mikrotik.com/wiki/Advanced_Routing_Failover_without_Scripting
, but i did not understand how it’s working.
The idea is that we create fake gateways (via pingable hosts ip’s) and if it’s not pingable then switch to alternate default route (distance 2). But i want deeply understand the mechanics of this process.
Here is my config:
[admin@MikroTik] /ip route> add dst-address=8.8.8.8/32 gateway=<ISP1 gateway ip> scope=10
[admin@MikroTik] /ip route> add dst-address=8.8.4.4/32 gateway=<ISP2 gateway ip> scope=10
[admin@MikroTik] /ip route> add distance=1 gateway=8.8.8.8 routing-mark=ISP1 check-gateway=ping
[admin@MikroTik] /ip route> add distance=2 gateway=8.8.4.4 routing-mark=ISP1 check-gateway=ping
[admin@MikroTik] /ip route> add distance=1 gateway=8.8.4.4 routing-mark=ISP2 check-gateway=ping
[admin@MikroTik] /ip route> add distance=2 gateway=8.8.8.8 routing-mark=ISP2 check-gateway=ping
[admin@MikroTik] /ip route> print
Flags: X - disabled, A - active, D - dynamic,
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme,
B - blackhole, U - unreachable, P - prohibit
# DST-ADDRESS PREF-SRC GATEWAY DISTANCE
0 A S 0.0.0.0/0 8.8.8.8 1
1 S 0.0.0.0/0 8.8.4.4 2
2 S 0.0.0.0/0 8.8.4.4 1
3 A S 0.0.0.0/0 8.8.8.8 2
4 ADS 0.0.0.0/0 <ISP1 gateway ip> 0
5 DS 0.0.0.0/0 <ISP2 gateway ip> 1
6 A S ;;; for WAN Failover purposes
8.8.4.4/32 <ISP2 gateway ip> 1
7 A S ;;; for WAN Failover purposes
8.8.8.8/32 <ISP1 gateway ip> 1
...ommited..