Multiple WAN connections with UCx

[random192]

Hello all,

I'm starting to look into implementing multi-WAN setups to be able to fail-over to a backup connection in the event the primary connection fails. Has anyone else had success with implementing a multi-wan solution with a prem based UCx?

 

[ucxguy]

It depends on what you use the WAN connection for. If it is used just for updates, there is no problem at all. If you want to use SIP trunk(s) on the public network, then you're facing an issue how to configure the external IP address used for remote SIP devices. If you set it to the public IP address of the "WAN1 device", SIP trunks would not work when you switch to the "WAN2 device" and vice versa. The same issue would exist for remote phones if you plan to use them.

 

[random192]

Thanks for your response. I did a little more digging and found references to some having set the SIP settings IP configurations to Dynamic and utilized a dyndns service coupled with low registration refresh times to achieve the desired effect. Any reason this wouldn't work with UCx?

 

[ucxguy]

First, I don't think you could use dyndns easily. Second, such a solution would be a workaround at best. You would first need a DNS name. You would then rely on some system (PC or server) that runs a dynamic DNS agent, the agent would detect the network change, report it to a DNS service, which would update the corresponding record and start the propagation of the change to all DNS servers. The SIP module on the UCx would periodically check the DNS name resolution and use the new address when it becomes available. The delay would be several minutes at best.

Maybe you should contact E-MetroTel and suggest a product enhancement to have a configurable option to allow the external IP address to be periodically checked and automatically updated.

 

[random192]

Your response is again much appreciated. I will reach out E-Metrotel for comment. Thank you for helping me to understand this more fully.