question from new to 2.5g wan port user

[consorts]

I am in the process of migrating my lan off a dying 8yo ac3100 to a new ax6000 asus ax88u-pro hw3.x made 2025. my isp is fios 300/300 (asus wan ethernet 5e connected to ont, there is no verizon router in bridge mode in the way). i did not file transfer config, rather i'm manually config every ax6000 setting by hand, so i can learn along the way what is different, working, irrelevant to my needs, etc. before my family wakes up, i wire the isp ont to my ax6000 and use it in router mode (antenna not screwed in yet) then before 10am i power cycle my ont then connected it to the wan port of my ac3100 for the family to use till i am 100% sure the ax6000 is ready to take it's place. everything i touch seems to work fine, till i noticed speed testing on the new ax6000 had a weak upload. but here you can see i am testing directly from my router wan port (so it's not a wifi or lan client ethernet issue) to several local NYC isp test sights, and I am only getting 100 out of the 300 I paid for. before calling my ISP to complain, i ran the same tests to the same ISP test sights on my old ac3100 and sure enough it showed up as the full 300/300.

since I am new to 2.5g ethernet ports, I am left wondering the following;
(A) despite using 300/300 on a quality 5e cable, maybe i need a newer cable to make this 2.5g port feel better?
(B) there is some setting buried deep in the firmware gui i can't find that forces the wan port to work at 1.0g?
(C) i am supposed to use a LAN port as WAN port (tell the fw) as to avoid any 2.5g rated ports altogether?
(D) my ISP is "unfamiliar" with my new router's MAC operating on their network, so in time i will get 300/300.
(E) store_na AT asus DOT com shipped me a brand new lemon, and I must begin that form of RMA nightmare.
(F) some other issue my outdated experience with >1g wan port routers has left me ill prepared to navigate.

please help, as i promised the wife we'd be new router live by this weekend,
and she's already upset i bought a new router instead of using a fios freebie.

update: thanks for all the posts here. since i can only work on the new ax6000 while family sleeps
i will read everyone's ideas and apply them early thursday est/usa and reply with what i observe.

 

[degrub]

Likely CPU overloaded. Known issue for Gbit/s or higher WAN link rates. You should always run any speed testing from a capable LAN client.

What do you get if you use the FIOS freebie ?

 

[ColinTaylor]

Test again from an ethernet connected LAN client.

 

[OzarkEdge]

I am in the process of migrating my lan off a dying 8yo ac3100 to a new ax6000 asus ax88u-pro hw3.x made 2025. my isp is fios 300/300 (asus wan ethernet 5e connected to ont, there is no verizon router in bridge mode in the way). i did not file transfer config, rather i'm manually config every ax6000 setting by hand, so i can learn along the way what is different, working, irrelevant to my needs, etc. before my family wakes up, i wire the isp ont to my ax6000 and use it in router mode (antenna not screwed in yet) then before 10am i power cycle my ont then connected it to the wan port of my ac3100 for the family to use till i am 100% sure the ax6000 is ready to take it's place. everything i touch seems to work fine, till i noticed speed testing on the new ax6000 had a weak upload. but here you can see i am testing directly from my router wan port (so it's not a wifi or lan client ethernet issue) to several local NYC isp test sights, and I am only getting 100 out of the 300 I paid for. before calling my ISP to complain, i ran the same tests to the same ISP test sights on my old ac3100 and sure enough it showed up as the full 300/300.


View attachment 66897

since I am new to 2.5g ethernet ports, I am left wondering the following;
(A) despite using 300/300 on a quality 5e cable, maybe i need a newer cable to make this 2.5g port feel better?
(B) there is some setting buried deep in the firmware gui i can't find that forces the wan port to work at 1.0g?
(C) i am supposed to use a LAN port as WAN port (tell the fw) as to avoid any 2.5g rated ports altogether?
(D) my ISP is "unfamiliar" with my new router's MAC operating on their network, so in time i will get 300/300.
(E) store_na AT asus DOT com shipped me a brand new lemon, and I must begin that form of RMA nightmare.
(F) some other issue my outdated experience with >1g wan port routers has left me ill prepared to navigate.

please help, as i promised the wife we'd be new router live by this weekend,
and she's already upset i bought a new router instead of using a fios freebie.

Be sure to Reset the firmware before you configure it.

FWIW, I get the following router speed test result on 500/20 cable Internet:

Perfom a speed test from a wired client... ideally before you mess with too many router settings.

Test with the WAN cable that came with the new router. What does the router webUI report for the 2.5GbE WAN port status?

OE