Weird Asus GT-AX11000 Pro Behavior

[RMinNJ]

Which modem.did you settle on? Same pictures if you plug that PC into the modem 2.5 port and then modem 1G port?

 

[Sparky93]

Which modem.did you settle on? Same pictures if you plug that PC into the modem 2.5 port and then modem 1G port?

I stuck with the s33 since it always worked in the past. I'll check shortly to see modem only speeds. I actually bought a 2.5 gb nic for my plex server/pc to test on there and rule out the ethernet port. Sure enough this pc has the same behavior. I get 1300 mbps when off the 2.5 g port on router. And then I get like 730 when off the 1 gig port on router. Can't explain it man.

 

[Sparky93]

Which modem.did you settle on? Same pictures if you plug that PC into the modem 2.5 port and then modem 1G port?

Ok as requested. Directly off the modems 2.5g port snd 1 g port. Starting to think not a router issue somehow? I did get better 1 gig port speeds from modem. But Def bandwidth on the table. I used to saturate at 940 mbps.

 

[Sparky93]

Also did nuke on router. No change

 

[jsz]

Also did nuke on router. No change

Do you have older router to test?

 

[Sparky93]

Do you have older router to test?

Sure do, gonna eat dinner and give it a shot after. Will update.

 

[Sparky93]

Do you have older router to test?

Tested old router. Not getting gig speeds. 790 was highest. Im confused and scared now, someone hold me.

 

[jsz]

Either ISP or modem then..

Wonder if theres an issue with your specific S33.. Doesn't make sense that it does full speeds on 2.5G but struggles on 1G.

 

[Sparky93]

Either ISP or modem then..

Wonder if theres an issue with your specific S33.. Doesn't make sense that it does full speeds on 2.5G but struggles on 1G.

Motorola modem shows same issue

 

[jsz]

Yeah.. ISP sided then.

I wonder if theres something wrong with their provisioning. Never had an issue prior to receiving a 2.5G router?


Nothing else makes sense at this point considering two separate BCM3390 modems have the same issue.

 

[Sparky93]

Yeah.. ISP sided then.

I wonder if theres something wrong with their provisioning. Never had an issue prior to receiving a 2.5G router?


Nothing else makes sense at this point considering two separate BCM3390 modems have the same issue.

I had a few days where I wouldn't get full speed, but I just chalked that up to congestion lol. This whole thing has thrown me for a loop. I guess I'll contact xfinity again. Just really bizzare that 1.2 gbps speed works fine you know. Strange behavior. Yea I've done two routers two modems all with same results so idk

 

[Sparky93]

Incase anyone is still following this thread or stumbles upon it. Still seeing the same issue almost 9 months later. Iperf still shows full saturation of every single lan port. only one pc is able to achieve full speed from router and its my 2.5 gig nic pc. But its only when hooked up to the 2.5 gig port. So still no dice, Xfinity cant see anything wrong on their end, tech came by and agreed that my setup is flawless, no one has any idea what is happening, i must live in the bermuda triangle of networking

 

[BadBilly]

Incase anyone is still following this thread or stumbles upon it. Still seeing the same issue almost 9 months later. Iperf still shows full saturation of every single lan port. only one pc is able to achieve full speed from router and its my 2.5 gig nic pc. But its only when hooked up to the 2.5 gig port. So still no dice, Xfinity cant see anything wrong on their end, tech came by and agreed that my setup is flawless, no one has any idea what is happening, i must live in the bermuda triangle of networking

This is an old thread but I'm still going to post. I ran into the same problem with a newly purchased GT-AX11000 Pro just 2 months ago and a Spectrum gigabit upgrade. I read something in this thread about modems not being updated and not so compatable with the GT_AX110000 so I thought for gigles I would try loading the firmware 1 upgrade from what it was origionally shipped with back in 2022 but a Merlin version of that firmware and it has seemed to fix the throughput of the router. My problem was with my old router I was seeing 940-960Mps then when I installed the GT-RX11000 Pro the best I could get was 700Mps and sometimes 720Mps. Had Spectrum out and everything tested fine, they told me it was network congestion but that didn't make sense because my old TP Link router was getting over 900Mps. The firmware I'm running is Merlin GT-AX11000_PRO_386.8_0_nand_squashfs. Maybe this will help someone in the same situation.