LACP Aggregating 4x1GbE on WAN - Possible?

[agcastle2kj316]

I'd like to know if it's possible to aggregate NICs for the WAN. In my lab, it looks like it's easy to do this for LAN which I'd eventually deploy in the production using an old HPE 360e. The firewall would protect a Restricted Zone, and my plan is to connect the WAN (LAGG0) interface of OPNsense to the Cisco core switch in the production LAN, and the LAN (LAGG1) interface of OPNsense to the access switch in the Restricted Zone.

Appreciate in advance your insights and help.

Stay safe!

[mimugmail]

Why shouldnt this work? If other side also speaks LACP, No problem

[Alphabet Soup]

If you're wanting a "Yes, I've done that" reply, here it is.  I have a number of FreeBSD servers with LACP uplinks to switches, including one that is a 4-port 1GbE LACP trunk to a Cisco 3850 switch.

The only issue I have with that one isn't related to the link aggregation, but to a bug with VLAN tagging in hardware, which is broken if you are bridging VLANs.  This is scenario more likely to happen when the host is running virtualized guests.  Less likely if you're just routing/firewalling.