connect my laptop to itself with USB Ethernet adapter - ping timeout

Topology

192.168.2.1       /24       192.168.2.2
+-----------------------------------------+
|      normal straight through cable      |
| +-------------+           +-----------+ |
| |   AX88179   |           |  I219-V   | |
+-+ enp0s20f0u2 +-USB-820g3-+ enp0s31f6 +-+
  |     MDI     |           |   MDI-X   |
  +-------------+           +-----------+

Laptop model

$ sudo dmidecode | grep -i hp
Product Name: HP EliteBook 820 G3

USB to Ethernet Controller

$ lsusb | grep -i eth
Bus 002 Device 006: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
$ su -
# ethtool -i enp0s20f0u2
driver: ax88179_178a
version: 5.12.2-arch1-1
firmware-version:
expansion-rom-version:
bus-info: 2-2:1.0
supports-statistics: no
supports-test: no
supports-eeprom-access: yes
supports-register-dump: no
supports-priv-flags: no

Ethernet port

$ lspci | grep -i eth
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection I219-V (rev 21)
$ su -
# ethtool -i enp0s31f6
driver: e1000e
version: 5.12.2-arch1-1
firmware-version: 0.13-4
expansion-rom-version:
bus-info: 0000:00:1f.6
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

Escalate

su -

Put AX88179 to force MDI (straight through) mode and set it to 192.168.2.1/24

sleep 1; ip link set enp0s20f0u2 down
sleep 1; ip addr flush enp0s20f0u2
sleep 1; ethtool -s enp0s20f0u2 mdix off
sleep 1; ip addr add 192.168.2.1/24 dev enp0s20f0u2
sleep 1; ip link set enp0s20f0u2 up

Put I219-V to force MDI-X (crossover) mode and set it to 192.168.2.2/24

sleep 1; ip link set enp0s31f6 down
sleep 1; ip addr flush enp0s31f6
sleep 1; ethtool -s enp0s31f6 mdix on
sleep 1; ip addr add 192.168.2.2/24 dev enp0s31f6
sleep 1; ip link set enp0s31f6 up

ethtool enp0s20f0u2 (AX88179)

Settings for enp0s20f0u2:
  Supported ports: [ TP  MII ]
  Supported link modes:   10baseT/Half 10baseT/Full
                          100baseT/Half 100baseT/Full
                          1000baseT/Half 1000baseT/Full
  Supported pause frame use: No
  Supports auto-negotiation: Yes
  Supported FEC modes: Not reported
  Advertised link modes:  10baseT/Half 10baseT/Full
                          100baseT/Half 100baseT/Full
                          1000baseT/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: Symmetric Receive-only
  Link partner advertised auto-negotiation: Yes
  Link partner advertised FEC modes: Not reported
  Speed: 1000Mb/s
  Duplex: Full
  Auto-negotiation: on
  Port: MII
  PHYAD: 3
  Transceiver: internal
  Supports Wake-on: pg
  Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
  Link detected: yes

ethtool enp0s31f6 (I219-V)

Settings for enp0s31f6:
  Supported ports: [ TP ]
  Supported link modes:   10baseT/Half 10baseT/Full
                          100baseT/Half 100baseT/Full
                          1000baseT/Full
  Supported pause frame use: No
  Supports auto-negotiation: Yes
  Supported FEC modes: Not reported
  Advertised link modes:  10baseT/Half 10baseT/Full
                          100baseT/Half 100baseT/Full
                          1000baseT/Full
  Advertised pause frame use: No
  Advertised auto-negotiation: Yes
  Advertised FEC modes: Not reported
  Speed: 1000Mb/s
  Duplex: Full
  Auto-negotiation: on
  Port: Twisted Pair
  PHYAD: 1
  Transceiver: internal
  MDI-X: on (forced)
  Supports Wake-on: pumbg
  Wake-on: d
        Current message level: 0x00000007 (7)
                               drv probe link
  Link detected: yes

Ping

# L -> R
ping -I enp0s20f0u2 192.168.2.2
# R -> L
ping -I enp0s31f6   192.168.2.1

Timeout