Proxmox with Two router

[kondorpa]

Hi,

I have two router setup at home from two different ISPs.
One has private IP rage of 172.16.100.1/24 and another one is having 10.10.10.1/24.
I normally switch between two connections (whenever one is not working or down etc.) in my other devices.
How can I setup proxmox to switch between these two connections whenever required? Now I have set up proxmox to run on 172.16.100.3 IP.

 

[Hannes Laimer]

Hey,

I assume you have two interfaces on your pve. You could make a bond in active-backup-mode[1] out of those. For that to work both routers should have the same network. With a setup like that you could also make PVE(a VM on it) your router, so you wouldn't have to do anything on your devices and the bond takes care of using the router that works.

[1] https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysadmin_network_configuration

 

[guletz]

You could make a bond in active-backup-mode[1] out of those. For that to work both routers should have the same network. With a setup like that you could also make PVE(a VM on it) your router, so you wouldn't have to do anything on your devices and the bond takes care of using the router that works.

Hi,

This will work, only if one ruter will have "link down", but it could also the case whe both routers will have link up, but only one could forward traffic to Internet.


Good luck /Bafta !

 

[guletz]

.... A better solution:

Use a script on each of yours PMX nodes:

- create 2 static routes, one to your ISP-A(primary) and the other to ISP-B(secondary)

route add -host 8.8.8.8 gw ISP-A_IP
route add -host 8.8.4.4. gw ISP-B_IP

- test both destinations(8.8.8.8 / 8.8.4.4) with ICMP (1 test / 5 min )
- if the test on primary is failed, then change your default GW on ISP B
- when you are using ISP B, and test on ISP-A is OK, then change the default gw to ISP-A


Notes:

- you could also use a more enhanced test, like testing 2 different IPs for each ISP, and IF both tests failed then you could be
very sure the Internet is down.
- you could use monit for such kind of tests

Good luck / Bafta !

 

[vesalius]

can either or both of those isp routers be put into bridge mode? You could research and use something like OPNsense/pfSense/VyOS to manage that 2 isp gateway switching for you transparently. The software could be run as a Proxmox vm or on separate hardware. Then both Proxmox and the rest of your physical home network devices can take advantage of gateway switching without the need to physically swap cables.