Any real downsides to using WAN ports for LAN? Increased router CPU usage?

[aunsafe2015]

AX86U Pro. Has WAN ports that can be used as an extra LAN port. Any downside to doing so?

On one forum I read that the router CPU usage goes up because the router itself has to bridge the WAN port to the LAN.

Is that a legitimate concern on something like the AX86U Pro?

Thanks for any input.

 

[bennor]

No issues using the 2.5 GB port as a LAN port on the RT-AX86U Pro. Have my NAS on it running at 1 GB.

Edit to add: don't notice any increase in CPU usage but I don't keep a close eye on it.

 

[bbunge]

Using the 2.5 GB port for backhaul to AX86U 2.5 GB port. No problems. I, too, have used the 2.5 GB port to my NAS with no issues.

 

[drinkingbird]

AX86U Pro. Has WAN ports that can be used as an extra LAN port. Any downside to doing so?

On one forum I read that the router CPU usage goes up because the router itself has to bridge the WAN port to the LAN.

Is that a legitimate concern on something like the AX86U Pro?

Thanks for any input.

There are certain models where it seems to be an issue, I think people found using wan for backhaul on XT8 resulted in reduced throughput, but I don't think it is common.

Sounds like others aren't having any issues on your model so should be good.