Diagnostic info:
=================
# sudo lspci -knn | grep Eth -A3
07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 0c)
        Subsystem: Gigabyte Technology Co., Ltd Device [1458:e000]
        Kernel driver in use: r8125
        Kernel modules: r8169, r8125

# sudo lshw -class network
  *-network
       description: Ethernet interface
       product: RTL8125 2.5GbE Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: enp7s0
       version: 0c
       serial: 10:ff:e0:xx:yy:75
       size: 1000Mbit/s
       capacity: 2500Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd 2500bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8125 driverversion=9.015.00-NAPI-PTP-RSS duplex=full firmware=rtl8125d-1_0.0.7 10/15/24
                      ip=172.xx.yyy.191 latency=0 
       link=yes multicast=yes port=twisted pair speed=1000Mbit/s
       resources: irq:36 ioport:f000(size=256) memory:f6c00000-f6c0ffff memory:f6c10000-f6c13fff

# sudo ethtool enp7s0
Settings for enp7s0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
                                2500baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
                                2500baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Full
        Link partner advertised pause frame use: No
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        MDI-X: on
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000033 (51)
                               drv probe ifdown ifup
        Link detected: yes

# sudo dmesg | grep r8169
[    4.224583] r8169 0000:07:00.0: error -ENODEV: unknown chip XID 688, contact r8169 maintainers (see MAINTAINERS file)

# sudo dmesg | grep r8125
[    6.341484] r8125 Ethernet controller driver 9.015.00-NAPI-PTP-RSS loaded
[    6.365415] r8125: This product is covered by one or more of the following patents: US6,570,884, US6,115,776, and US6,327,625.
[    6.366317] r8125  Copyright (C) 2024 Realtek NIC software team <nicfae@realtek.com>
[    6.391606] r8125 0000:07:00.0 enp7s0: renamed from eth0
[ ... ]
[   25.733702] r8125: enp7s0: link up