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

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GRIMACE66

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

« on: October 07, 2023, 09:40:25 pm »

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?

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Patrick M. Hausen

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

« Reply #1 on: October 07, 2023, 11:07:44 pm »

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

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Deciso DEC750
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Maurice

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

« Reply #2 on: October 07, 2023, 11:29:45 pm »

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

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CJ

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

« Reply #3 on: October 08, 2023, 03:34:24 pm »

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.

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