CentOS

I'm running Google compute engine virtual maching(Centos 7). To make eth1 active, Google suggests using ip route and rule add commands, which are not persistent. I created a script that works on reboot, but not when the network is restarted.

To make this persistent, I've placed rules in /etc/sysconfig/network-scripts/rule-eth1 and they appear to be working properly based on ip rule show tab rt1. For routes, I've placed the following in /etc/sysconfig/network-scripts/route-eth1 when I check ip route show tab rt1 nothing shows up.
If subsequently run: The eth1 connection starts working (can ping external IP addresses) and running ip route show tab rt1 now shows So rules work properly and routes fail in /etc/sysconfig/network-scripts/. One thing that I noticed is my ip route add script wouldn't work until I used Any suggestions or tips on how to troubleshoot this problem are appreciated.

At a guess, perhaps the route is applied before the table has been setup, in which case the route says apply to (a currently non existent) table? Try and simplify what you are doing.

What I am doing is actually pretty simple, I put what appear to be the correct commands into /etc/sysconfig/network-scripts/rule-eth1

I only run a script because the command mentioned does not load. In fact, I want to do away with the script. The question is really does anyone know why the rule isn't sticking?

No it's not.

You're sometimes doing layer 2 and sometimes doing layer 3.