Permanent Static Route

[Boss]

Hi - a couple of questions about making a static route permanent, I have a couple of bridged interfaces vmbr0 (1G i/face) & vmbr1 (10G i/face) and are the same on each Proxmox server.
Currently vmbr0 is the default i/face for my clustered Proxmox Servers.
I have manually added a static route for vmbr1 ( ip route add 172.1.2.3 dev vmbr1) and ran a traceroute which shows that traffic for 172.1.2.3 now goes via vmbr1. I checked the other clustered proxmox servers and they also now use the new route. All good so far!
What do I need to add to the interfaces file to make this permanent?

I have also attached an iSCSI disk to the cluster ( 172.1.2.4 ) which currently defaults to the 1G i/face (vmbr0) - I presume that it I follow the same process to set a static route for the iSCSI device to use the vmbr1 i/face? I've been a bit hesitant to making any changes for this as all my VMs use the iSCSI disk.
Thanks

 

[aaron]

How is your network configured? Is that subnet configured on multiple NICs?

We usually recommend to use different IP subnets if you want so distribute traffic over different physical NICs/Bonds. Configuring routes for specific hosts/ranges over a different NIC can work, but can lead to issues in the future if one forgets about this special route for example.

Look into post-up & post-down commands in the network config to set up and tear down the route if the NIC comes up & down.

 

[Boss]

Thanks - will check out the docs. Unfortunately all servers/devices are on the same subnet which is why I can only assign the route to an individual address to make the most of the 10G i/face.