SB8200v3 has no advanced tab to turn on link aggregation

that’s not the point of “WAN link aggregation” from a modem. you dont need 2 ip addresses. You only have one in with the coaxial then. The point of WAN link aggregation is one line in with coaxial that provides a 1-2 GBPS connection then you connect the TWO 1 gbps lines from your modem to your router then creating a > 1 gbps connection by combining those two 1 G lines into one stream (aggregation). In my case I have 1.4 gbps from Xfinity then the LAG from the modem aggregates the two 1 gbps speed together in the router to get the full speed of 1.4 gbps. The reason for this is because my router only has 1 gbps on the “in” WAN ports. (1 being the WAN and another being one of the LAN 4 port) then I can output the aggregated speed in the router to my pc my 2.5 GBPS LAN port to my pc which has a 2.5 WAN eth port. I know how this works, my older modem works like that. I already looked at those instruction to turn on the Link aggregation but as I said there is NO “Advanced tab” on my modems firmware (see screenshot)  for some reason. Also, yes I did check that both cables are same spec both are Cat 5e. The system I had set up is no different from what I had before which worked perfectly fine with my older modem but I had to replace the modem because it burned out and this modem claimed to support link aggregation and as it also shows in the instructions you provided me for a SB8200. Did they remove that with model 3?? If so, I am taking it back to the store. So, to reiterate, what “LAN Aggregation” in a modem does is give the spill over speed to the 2nd cable then the router combines both of those speeds to go over 1 gbps. But alas I absolutely do not see any Advanced tab in the firmware software to turn this feature on.