Eth0 can not link up after many times of down/up on xavier-nx

Hello, team, I have two Jetson Xavier NX emmc modules(Jetson Linux Release 32.7.2 ) to connect each other by ethernet eth0 interface, and run following test script on one module (actually ifconfig down/up eth0 ):

n=0
while true;do
 
 	n=`expr $n + 1`
	echo "test: $n"

	ifconfig eth0 down;
	sleep 2;
	ifconfig eth0 up

	sleep 15

	ethtool eth0 | grep Speed
	ethtool eth0 | grep "Link detected"

	[ `ethtool eth0 | grep 1000Mb/s -c` -ne 1 ] \
		|| [ `ethtool eth0 | grep "Link detected: yes" -c` -ne 1 ] \
		&& break 
done

Here is the result of test:

test: 1530
	Speed: 1000Mb/s
	Link detected: yes
test: 1531
	Speed: 1000Mb/s
	Link detected: yes
test: 1532
	Speed: 1000Mb/s
	Link detected: yes
test: 1533
	Speed: 10Mb/s
	Link detected: no
root@w:~# 
root@w:~# ethtool eth0
Settings for eth0:
	Supported ports: [ TP MII ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/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 
	Advertised pause frame use: Symmetric Receive-only
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Speed: 10Mb/s
	Duplex: Half
	Port: MII
	PHYAD: 1
	Transceiver: internal
	Auto-negotiation: on
	Supports Wake-on: g
	Wake-on: d
	Link detected: no

root@w:~# cat /sys/class/net/eth0/carrier
0
root@w:~# 
root@w:~# ifconfig eth0
eth0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 48:b0:2d:5f:c7:9f  txqueuelen 1000  (Ethernet)
        RX packets 860  bytes 48026 (48.0 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3245  bytes 485395 (485.3 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 37  


root@w:~# 
root@w:~# sh phy_dump.sh 
Page:0, Reg:0 0x1040
Page:0, Reg:1 0x79ad
Page:0, Reg:2 0x001c
Page:0, Reg:3 0xc916
Page:0, Reg:4 0x0de1
Page:0, Reg:5 0xcde1
Page:0, Reg:6 0x006d
Page:0, Reg:7 0x2801
Page:0, Reg:8 0x4006
Page:0, Reg:9 0x0200
Page:0, Reg:10 0x4800
Page:0, Reg:11 0000
Page:0, Reg:12 0000
Page:0, Reg:13 0x4007
Page:0, Reg:14 0x0006
Page:0, Reg:15 0x2000
Page:0xa42, Reg:16 0xffff
Page:0xa42, Reg:17 0xffff
Page:0xa42, Reg:18 0xffff
Page:0xa42, Reg:19 0xffff
Page:0xa42, Reg:20 0xffff
Page:0xa42, Reg:21 0xffff
Page:0xa42, Reg:22 0xffff
Page:0xa42, Reg:23 0xffff
Page:0xa43, Reg:24 0xffff
Page:0xa43, Reg:25 0xffff
Page:0xa43, Reg:26 0xffff
Page:0xa43, Reg:27 0xffff
Page:0xa43, Reg:28 0xffff
Page:0xa43, Reg:29 0xffff
Page:0xa43, Reg:30 0xffff
Page:0xa43, Reg:31 0xffff
Page:0xa46, Reg:20 0xffff
Page:0xd04, Reg:16 0xffff


After several times, eth0 negotiate failed to 10M half, and can not dectect the link any more (but the LEDs of RJ45 are on), even unplug and replug the ethernet cable.

root@w:~# cat /sys/class/net/eth0/carrier
0

And dmesg doesnot show any details about the issue:
root@w:~# dmesg | tail
[ 9394.252658] eqos 2490000.ether_qos eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 9394.254073] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 9396.852786] gpio tegra-gpio wake20 for gpio=52(G:4)
[ 9396.857707] net eth0: get_configure_l3v4_filter →
[ 9396.862408] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 9401.066151] eqos 2490000.ether_qos eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 9401.067561] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 9404.324667] gpio tegra-gpio wake20 for gpio=52(G:4)
[ 9404.326756] net eth0: get_configure_l3v4_filter →
[ 9404.327596] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
root@w:~#

root@w:~# uname -a
Linux w 4.9.253-tegra #1 SMP PREEMPT Sun Apr 17 02:37:44 PDT 2022 aarch64 aarch64 aarch64 GNU/Linux

root@w:~# cat /etc/nv_tegra_release
#R32 (release), REVISION: 7.2, GCID: 30192233, BOARD: t186ref, EABI: aarch64, DATE: Sun Apr 17 09:53:50 UTC 2022

please help me to solve the problem, thanks

here is the bootlog
bootlog-xavier-nx.txt (95.8 KB)

I’m closing this topic due to there is no update from you for a period, assuming this issue was resolved.
If still need the support, please open a new topic. Thanks

Sorry for the late response, have you managed to get issue resolved or still need the support? Thanks