How to connect Dual WAN ports on docsis 3.1 modem to OpnSense

[GRIMACE66]

I have a DOCSIS 3.1 modem (SB8200 SURFboard) that has two 1gb uplink ports on it for WAN, How do I set that up in OPN? Do I have to create a lagg group first or is there a better way?

[Patrick M. Hausen]

What does your modem's documentation say about how to use/configure these two ports?

[Maurice]

You have to create a LAGG in OPNsense and enable link aggregation on the modem.

https://arris.my.salesforce-sites.com/consumers/articles/General_FAQs/SB8200-Link-Aggregation-Setup

Cheers
Maurice

[CJ]

It depends on the modem.  Some of them will only allow one port active at a time.  However, those are usually the ones that have something like a 2.5g and a 1g port, not the ones with multiple 1g ports.