Utilize two gateways on the same network same interface with load balancing
- by RushPL
My setup is two ISPs on a single interface and single network. I can either set my default gateway to 192.168.0.1 or 192.168.1.250 and either work.
My desire is to utilize both of them with some load balancing. I have tried to follow the advice given in here
http://serverfault.com/a/96586
#!/bin/sh
ip route show table main | grep -Ev '^default' \
| while read ROUTE ; do
ip route add table ISP1 $ROUTE
done
ip route add default via 192.168.1.250 table ISP1
ip route add default via 192.168.0.1 table ISP2
iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
iptables -t mangle -A PREROUTING -m mark ! --mark 0 -j ACCEPT
iptables -t mangle -A PREROUTING -j MARK --set-mark 10
iptables -t mangle -A PREROUTING -m statistic --mode random --probability 0.5 -j MARK --set-mark 20
iptables -t mangle -A PREROUTING -j CONNMARK --save-mark
Now then I do "traceroute somehost" repeatedly I can only get route through my default route which is 192.168.1.250. Shouldn't the packets change routes in a random manner? How to debug it?
