TP-Link TL-WDR4300 and nextcloud

Hi experts,

my DDWRT firmware is v3.0-r44191 std (08/15/20), and router is TP-Link TL-WDR4300
nextcloud latest version is the only application in my raspberry pi 4 (2GB,raspbian lite,latest version), I assigned 1GB memory to php
I installed nextcloud client in my desktop pc to sync files

nextcloud ran smooth at first day, then my network kept unstable. I ping the raspberry via my desktop under the same home wifi, sometime is under 15ms,sometimes is above 300ms. I turn off raspberry, my network will be stable(<15ms) again.

sounds as if there could be a problem with the local (internal) IP of your nextcloud. pls check if the IP-address was used on more than one hardware (not really recommended to use it on more than one hardwares)

it’s a static ip. I reserved the ip in ddwrt by mac address

static is good. should be static. right.

but you should check with your router… which most prolly is your DHCP server.