NSA310 - no network after boot (2 replies)

Hi,
I am opening this topic to get some ideas of investigations or corrections.
My setup is the following:

Router <-> unmanaged switch <-> NSA310

with an asuswrt router and a TP-Link TL-SG105 switch.

This configuration was fully functional until a power interruption on entire home.
Now NSA310 get an IP address only when connected directly to router.

Of course, I restarted all devices few times, I checked access on switch with another new devices and nothing changed.
BTW, in the same switch is a NSA325 (original firmware) without this issue.

Here are some details:
- ethernet LED is blinking just until the start of loading essential drivers and after is no more activity (when connecting to switch)
- if I am taking that cable and insert in PC starts immediately to negotiate and is getting IP
- if I am moving back to NSA310 nothing is happening (including LED activity)

- interface configuration:

rename /enp1s0=eth0
auto lo eth0
iface lo inet loopback
iface eth0 inet dhcp
        hwaddress ether [redacted MAC]

- logs during booting direct connection to router (it was before changing the name to eth0):

Listening on LPF/enp1s0/[redacted MAC]
Sending on   LPF/enp1s0/[redacted MAC]
Sending on   Socket/fallback
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 6
[   73.310930][   T64] r8169 0000:01:00.0 enp1s0: Link is Up - 10Mbps/Full - flow control rx/tx
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 10
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 17
DHCPOFFER of [redacted IP] from [redacted IP]

- logs during booting using the switch:

Listening on LPF/enp1s0/[redacted MAC]
Sending on   LPF/enp1s0/[redacted MAC]
Sending on   Socket/fallback
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 12
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 17
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 20
DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 7
No DHCPOFFERS received.

- content of printenv:

NSA310> printenv
arcNumber=2097
bootcmd=run bootcmd_uenv; run scan_disk; run set_bootargs; run bootcmd_exec
bootcmd_exec=run load_uimage; if run load_initrd; then if run load_dtb; then bootm $load_uimage_addr $load_initrd_addr $load_dtb_addr; else bootm $load_uimage_addr $load_initrd_addr; fi; else if run load_dtb; then bootm $load_uimage_addr - $load_dtb_addr; else bootm $load_uimage_addr; fi; fi
bootcmd_uenv=run uenv_load; if test $uenv_loaded -eq 1; then run uenv_import; fi
bootdelay=10
bootdev=usb
device=0:1
devices=usb ide
disks=0 1 2 3
dtb_file=/boot/dts/kirkwood-nsa310.dtb
ethact=egiga0
ethaddr=[redacted MAC]
led_error=orange blinking
led_exit=green off
led_init=green blinking
load_dtb=echo loading DTB $dtb_file ...; load $bootdev $device $load_dtb_addr $dtb_file
load_dtb_addr=0x2c00000
load_initrd=echo loading uInitrd ...; load $bootdev $device $load_initrd_addr /boot/uInitrd
load_initrd_addr=0x1100000
load_uimage=echo loading uImage ...; load $bootdev $device $load_uimage_addr /boot/uImage
load_uimage_addr=0x800000
machid=0x831
mainlineLinux=yes
mtdids=nand0=orion_nand
mtdparts=nand_mtd:0x100000(uboot),0x80000(uboot_env)
nc_ready=0
partition=nand0,2
scan_disk=echo running scan_disk ...; scan_done=0; setenv scan_usb "usb start";  setenv scan_ide "ide reset";  setenv scan_mmc "mmc rescan"; for dev in $devices; do if test $scan_done -eq 0; then echo Scan device $dev; run scan_$dev; for disknum in $disks; do if test $scan_done -eq 0; then echo device $dev $disknum:1; if load $dev $disknum:1 $load_uimage_addr /boot/uImage 1; then scan_done=1; echo Found bootable drive on $dev $disknum; setenv device $disknum:1; setenv bootdev $dev; fi; fi; done; fi; done
set_bootargs=setenv bootargs console=ttyS0,115200 root=LABEL=rootfs rootdelay=10 $mtdparts $custom_params
start_netconsole=setenv ncip $serverip; setenv bootdelay 10; setenv stdin nc; setenv stdout nc; setenv stderr nc; version;
stderr=serial
stdin=serial
stdout=serial
uenv_addr=0x810000
uenv_import=echo importing envs ...; env import -t $uenv_addr $filesize
uenv_init_devices=echo Initializing devices...; setenv init_usb "usb start";  setenv init_ide "ide reset"; for devtype in $devices; do run init_$devtype; done
uenv_load=run uenv_init_devices; setenv uenv_loaded 0; for devtype in $devices; do for disknum in $disks; do if test $uenv_loaded -eq 0; then setenv device_type $devtype; setenv disk_number $disknum; run uenv_read; fi; done; done;
uenv_read=echo Loading envs from $device_type $disk_number...; if load $device_type  $disk_number:1 $uenv_addr /boot/uEnv.txt; then setenv uenv_loaded 1; echo ... envs loaded; fi
usb_ready_retry=15

Environment size: 2725/131068 bytes

Any thoughts what to change or investigate?

Thank you