Eth0 down/up failed in JP5.0.2

I use sdkmanager to flash jp5.0.2 to xavier-nx on dev kits, when I login system and use the command “sudo ifconfig eth0 down” and then “sudo ifconfig eth0 up”, the eth0 will open failed, I cannot find eth0 in ifconfig(it can be found in “ifconfig -a”),so I have to reboot or reset the device.
I have tried jp4.6.1 and down/up the eth0 many times, it works well. This seems to happen only in jp5.0.2.
I want some help to check and solve the problem.
I will attach the dmesg.log,
dmesg.log (68.4 KB)

It failed to get eqos clk. I don’t observe this on my xavier nx devkit. is it easy to reproduce on your devkit?

[    7.677138] nvethernet 2490000.ethernet: setting to default DMA bit mask
[    7.685092] tegra_nvdisp_bandwidth_register_max_config: max config EMC floor = 933000000 Hz
[    7.693500] nvethernet 2490000.ethernet: set default TXQ to TC mapping
[    7.700227] tegra_nvdisp_bandwidth_register_max_config: max config hubclk = 300000000 Hz
[    7.700621] tegradc 15200000.display: vblank syncpt # 11 for dc 0
[    7.708249] nvethernet 2490000.ethernet: Setting default PTP RX queue
[    7.714849] tegradc 15200000.display: vpulse3 syncpt # 12 for dc 0
[    7.731506] nvethernet 2490000.ethernet: failed to get eqos_rx_m clk
[    7.735526] tegradc 15200000.display: Bootloader disp_param detected. Detected mode: 1920x1080 (on 0x0mm) pclk=148350937
[    7.741732] nvethernet 2490000.ethernet: failed to get eqos_rx_input clk
[    7.765840] nvethernet 2490000.ethernet: failed to get eqos_tx_divider clk
[    7.766340] tegradc 15200000.display: hdmi: invalid prod list prod_list_hdmi_board
[    7.773826] nvethernet 2490000.ethernet: Ethernet MAC address: 48:b0:2d:5f:8b:33
[   98.019479] [eqos_poll_for_swr][598][type:0x4][loga-0x0] poll_for_swr: timeout
[   98.019851] net eth0: failed to poll MAC Software reset

Thank you for your reply.
It seems very easy to reproduce on my devkit. I flashed the devkit many times and the problem still appears.

We have published the JetPack 5.1 GA release, please get it a try.

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