AT&T router (with gigabit internet) compatibility with Intel(R) Ethernet Controller (3) I225-V?

Yes all embedded Network Controllers work with ISP.

Go to Start>type in cmd> when prompt type in ipconfig /all

 and paste it in the reply

There was a user recently who had a I225-V that was negotiating at 100 Mbps instead of 1000 Mbps, but they did get it to negotiate.  Try a different port of the Gateway (especially if you're trying port 1 on a BGW 320).  If you have a gigabit switch lying around, try connecting through it.

What model Gateway do you have?

Does this help?

https://www.intel.com/content/www/us/en/support/articles/000057261/ethernet-products/gigabit-ethernet-controllers-up-to-2-5gbe.html

So there is a issue with the drivers

https://www.intel.com/content/www/us/en/support/articles/000057261/ethernet-products/gigabit-ethernet-controllers-up-to-2-5gbe.html

or you can find your Network Driver on your Motherboard driver page

Tried every port on the gateway/router - below is a paste of my ipconfig

C:\Users\danny>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : DESKTOP-HII02HA
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : attlocal.net

Ethernet adapter Ethernet:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) Ethernet Controller (3) I225-V
   Physical Address. . . . . . . . . : D8-BB-C1-9F-4A-1B
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Unknown adapter Local Area Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Private Internet Access Network Adapter
   Physical Address. . . . . . . . . : 00-FF-32-54-53-C3
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Local Area Connection* 1:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
   Physical Address. . . . . . . . . : 70-9C-D1-40-E0-44
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wi-Fi:

   Connection-specific DNS Suffix  . : attlocal.net
   Description . . . . . . . . . . . : Intel(R) Wi-Fi 6 AX200 160MHz
   Physical Address. . . . . . . . . : 70-9C-D1-40-E0-43
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2600:1700:37a0:5170::3e8(Preferred)
   Lease Obtained. . . . . . . . . . : Wednesday, 26 January 2022 17:10:47
   Lease Expires . . . . . . . . . . : Friday, 25 February 2022 14:03:26
   IPv6 Address. . . . . . . . . . . : 2600:1700:37a0:5170:c1c1:dae4:f8f6:710b(Preferred)
   Temporary IPv6 Address. . . . . . : 2600:1700:37a0:5170:c151:be67:9f0c:dfa7(Preferred)
   Link-local IPv6 Address . . . . . : fe80::c1c1:dae4:f8f6:710b%12(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.73(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Wednesday, 26 January 2022 17:10:45
   Lease Expires . . . . . . . . . . : Thursday, 27 January 2022 17:10:46
   Default Gateway . . . . . . . . . : fe80::e222:4ff:fe96:8591%12
                                       192.168.1.254
   DHCP Server . . . . . . . . . . . : 192.168.1.254
   DHCPv6 IAID . . . . . . . . . . . : 191929553
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-29-70-4B-67-D8-BB-C1-9F-4A-1B
   DNS Servers . . . . . . . . . . . : 2600:1700:37a0:5170::1
                                       192.168.1.254
   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Bluetooth Network Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
   Physical Address. . . . . . . . . : 70-9C-D1-40-E0-47
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

I just ordered a gigabit switch, so hopefully that'll work.

I have model:

AT7T U-Verse F268AC

appreciate the responses all!

It gets an IP address from the gateway  A gigabit switch won't help because the NIC can't see the cable only wifi.

From your output

  Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) Ethernet Controller (3) I225-V
   Physical Address. . . . . . . . . : D8-BB-C1-9F-4A-1B
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Media state (is the cable in the NIC) and your output says NO but physically connected so driver issue

Type in device manager and see if any ? or X is in the Network Adapters and report back If it device  manager detects the NIC is disabled by down Arrow  right-click the adapter and click enable

If Its a driver issue reinstall the LAN driver from the motherboard support driver page or follow below

We can steer you in the right direction to get help with your gateway's compatibility with the Intel ethernet controller, coxchris859.

If you're unable to find a resolution with our Ace and other community members, we suggest reaching out to the team at our paid service, AT&T HomeTech Protection. In addition to assisting with device coverage, they offer networking and 3rd party equipment support.

If you need help with anything else, feel free to reach back out.

Thank you for contacting the AT&T Community Forums team.

Aminah, AT&T Community Specialist

ATT, There is nothing you can do for him please read the OP posting before you bot me. Your Tech support is at par at best. He had a driver firmware problem and Tier 1 support won't work.

Thanks for your detailed instructions, @coxchris859.  And you may find it hard to believe, but you haven't been "bot-ed"; these are real people behind the ATTHelp label.

And you must be an optimist because the paid support is maybe "at bogey", at best. 😁

I know it's real people but they assume that I need help without reading the whole thread.

I was replying to his config /all log