Zyxel 310 doesn't answer ping/ssh after some time (no replies)

Hi,

with the help of bodhi (thank you again) I installed uBoot 2017.7 and Linux Kernel 5.5.1 on my Zyxel 310. Everything seems to work fine when the box boots up. I was able to install some things and I was generally very satisfied with everything. But now I noticed that the NAS disappears from the network. It's like it isn't connected to the router at all.

The lights are on and it works fine when I restart it. Has anybody experienced this? And does anybody have an idea how to debug this situation?

Thank you for your help!

ifconfig:

root@debian:~# ifconfig
br-2d18819732dc: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.18.0.1  netmask 255.255.0.0  broadcast 172.18.255.255
        inet6 fe80::42:38ff:fe77:b4d0  prefixlen 64  scopeid 0x20<link>
        ether 02:42:38:77:b4:d0  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 26  bytes 3592 (3.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:3c:43:83:94  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.178.12  netmask 255.255.255.0  broadcast 192.168.178.255
        inet6 fe80::200:ff:fe00:30  prefixlen 64  scopeid 0x20<link>
        ether 00:00:00:00:00:30  txqueuelen 1000  (Ethernet)
        RX packets 3494  bytes 216294 (211.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 99  bytes 12610 (12.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 2  bytes 78 (78.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2  bytes 78 (78.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth92e7680: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::48c9:dcff:fe9b:7e2c  prefixlen 64  scopeid 0x20<link>
        ether 4a:c9:dc:9b:7e:2c  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 44  bytes 5824 (5.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethebabf09: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::c3d:daff:fe70:7e00  prefixlen 64  scopeid 0x20<link>
        ether 0e:3d:da:70:7e:00  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 44  bytes 5824 (5.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp1s0 is the connection I am talking about. Is it possible that it disappears over time? Does it mean anything that the device is called enp1s0 instead of eth0?

root@debian:/fw_tools/tools# ./fw_printenv
dtb_file=/boot/dts/kirkwood-nsa310.dtb
arcNumber=4022
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; e
lse 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
device=0:1
disks=0 1 2 3
dtb_file=/boot/dts/kirkwood-nsa310.dtb
ethact=egiga0
ethaddr=52:3b:20:9c:11:51
if_netconsole=ping $serverip
ipaddr=192.168.0.231
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=0x1c00000
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
mainlineLinux=yes
mtdids=nand0=orion_nand
mtdparts=mtdparts=orion_nand:1M(u-boot),4M(uImage),32M(rootfs),-(data)
partition=nand0,2
preboot_nc=run if_netconsole start_netconsole
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
serverip=192.168.0.220
set_bootargs=setenv bootargs console=ttyS0,115200 root=LABEL=rootfs rootdelay=10 $mtdparts init=/bin/systemd
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";  setenv init_mmc "mmc rescan"; for devtype in $devices; do run init_$devtype; don
e
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_numbe
r $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_boot=run load_dtb; run load_uimage; if run load_initrd; then bootm 0x800000 0x1100000 0x1c00000; else bootm 0x800000 - 0x1c00000; fi
usb_ready_retry=15
devices=usb ide
bootdev=usb