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I need help with my setup which is :

ISP router LAN port => OpenWRT router WAN port.

OpenWRT router LAN ports and WIFI => my home devices

I am running default OpenWRT out of the box configuration. The WAN interface of OpenWRT router gets assigned global ipv6 address by the ISP router. My devices gets assigned local ipv6 addresses by the OpenWRT router.

The problem is ipv6 is not working in the LAN device (Windows PC). It means I can't ping an ipv6 global address like google DNS (2001:4860:4860::8888) from my LAN device.

IPv6 connectivity status in Windows PC:

enter image description here

But if I connect my Windows PC directly to ISP router's LAN port then I can ping the global ipv6 address.

My OpenWRT router is TP-Link MR3420 v5

Does OpenWRT not support ipv6 out of the box? Do I need to change some configuration?

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10
  • Perhaps your OpenWRT settings for DHCP are different for IPv4 and IPv6?
    – harrymc
    Commented Jan 14, 2022 at 10:22
  • @harrymc Then be a dear and tell me the correct settings?
    – pk1991
    Commented Jan 14, 2022 at 10:53
  • Please include screenshots of the router settings for both IPv4 and IPv6 in your post, my dear.
    – harrymc
    Commented Jan 14, 2022 at 10:58
  • @harrymc thats sounds like a lot of screenshots
    – pk1991
    Commented Jan 14, 2022 at 11:08
  • @harrymc postimg.cc/pyyz6Zsq
    – pk1991
    Commented Jan 14, 2022 at 11:17

1 Answer 1

Reset to default
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I changed DHCPv6 to relay mode as mentioned here

https://openwrt.org/docs/guide-user/network/ipv6/configuration#ipv6_relay

And it worked. The home devices are now getting ipv6 addresses directly from ISP router. This is enough for my needs.

ipv6 connected status

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    – Community Bot
    Commented Jan 14, 2022 at 15:47

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