@puneet87k
i jst randomly seen this thread .....so i thought to give my suggestion to you , it might be helpful since am also using
TP-Link XZ000G3
GPON
with
Archer c6 v3 on openwrt and i have no issue with speed in-fact i am getting faster speed than my plan
things you should look for while using TP-Link XZ000G3 GPON
1) check you have green optic patch code(
APC) since TP-Link XZ000G3 has green port. (MAJOR ISSUE ) if you have fluctuating speed .
i personally had to asked my operated to changed my connector plug to APC which was previously UPC ( jst search on
google if u are confused about APC/UPC)
2) there is an update for
TP-Link XZ000G3 on brazilian tplin website i have installed it works for me pretty well ( caution ) the ui language will change into brazalian there is no way to get back it into english since tplink has not pushed update in english version
3) i have problem with
mac address , since last digit of my mac address register on my ips data has variation , when i am on tplink os it does have any problem for connecting , while on OPENWRT i have to manually put the exact mac digit as on my isp to get connected .
example
my
router orginal mac is E0 50 C1 D4 P1 23
But on my ips connection profile its register as E0 50 C1 D4 P1 24
so when i am on OPENWRT i have to manually set it to "E0 50 C1 D4 P1 24" otherwise it won't get connected but when in tplink os its not a problem
HOPE IT HELPS