I have posted a few different problems recently and I know I am probably in over my head but I am trying to youtube/Google my way to solutions that are probably simple enough for the learned, so I would like to put out there what the purpose and limitations of the equipment I am working with so I can ask a few questions and i'm sure more as the system expands. I appreciate any input on the issues that follow.
Scope of the Issue
We have audio circuits to control our radio system running on copper that have been in place for decades. The phone companies seem hesitant to repair or replace copper as time goes on because it is outdated tech. We don't have the budget to fully update our radio system so we are trying to migrate away from copper lines as funding is available.
I am testing a set of ROIP devices that have two IP addresses per device, the standard address and an audio engine IP address. Each device has up to 8 analog audio ports, each analog port can be pointed at an analog port on another device, creating a point-point audio circuit. Each port can be pointed at a different IP address so Site A-1 can talk to Site B-1, site A-2 can talk to C-1, Site A-3 can talk to Site D-1......
One of the main limitations that we have is latency(being an Audio device), the maximum latency we can have and still have a useable system is 300ms.
Initially I set up the equipment in the office using a switch, assigned the equipment IP addresses, made sure they were all on the same network, Things worked flawlessly. But our sites are 100+ miles apart so the LAN was only an option for testing. I was asked to test them in the field using LTE modems(we have a contract with a Cellular carrier that makes these fairly cost effective compared to other WAN options). The issue I ran into with this option, was the IP address's that the equipment required. Each device required two addresses so the single WAN static IP that the LTE modem passed through wasn't going to do the job. After some googling and youtubing, I learned of the EOIP tunnels that Mikrotik offers, and the affordability of the equipment is a huge plus.
I currently have 3 of the audio devices connected to 3 Mikrotik HAP AC Lite's, my wan connections are coming through the three LTE cellular modems with IP pass through enabled, I have EOIP tunnels set up between the three mikrotik's in a Triangle set-up. Site A-Site B, Site A-Site C, Site B - Site C. As it stands now, I have a couple issues.
Issue 1 ; Site A tunnel to site C... when the router at Site A loses wan connection even momentarily the EOIP tunnel drops and doesn't recover. on the same switch the EOIP tunnel from A to B does recover.
I don't know the solution here, resetting the router at site C doesn't bring the tunnel back up, disabling and re-enabling the tunnel on either end doesn't recover the tunnel, removing and rebuilding the tunnel on both ends does not work either. the only thing that brings the tunnel back up is a reboot at of the router at Site A.
The equipment is in the field and it's a 200 mile round trip so I am hesitant to do anything that will cause me to lose the ability to talk to the router remotely, so I haven't tried resetting the router to the default config and rebuilding everything, short of that I may just head out there and swap out the equipment with another router if there isn't an easier solution.
Issue 2 : routing... I have been keeping an eye on the traffic when things are up and running. With EOIP tunnels A-B and A-C active only, My audio links between site A-B and A-C work great(until issue 1 causes the A-C to drop out). However when I try to add EOIP tunnel B-C, things start to go bad. It looks like the traffic for EOIP tunnel B-C takes the long way around going from B-A-C instead of the direct path B-C. In a 5g world this wouldn't be an issue, but we are stuck in a 4gLTE land. Ping times between each site directly hover around 200ms. So when the traffic between A-C takes the long way around it doubles the latency to 400+ pushing us outside of the audio equipment's working specs. I haven't been successful at googling the application of static routes for this situation, I think I need to set up static routes for traffic from A-B going through EOIP tunnel A-B, traffic for A-C going through EOIP tunnel A-C and so forth, but I am not sure how or where to start.
Issue 3 : Future... I have an IP scheme/layout in mind for a much larger system, and plan on upgrading the equipment from the HAP AC Lite's to a rack mount unit when/if things are fully deployed. I am looking at having 4 remote radio sites, and 4 office locations, that all inter-mingle at times. so if there are any solutions it would be really helpful if things are fairly copy and paste-able with minor tweaks here and there.
Again I appreciate any assistance
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