IPv6 stopped working

[kevinmcm]

I had computers behind a Cisco RV320 mostly working with Sonic.net 6rd for a few weeks. The only problem was that https was unreliable. Without me changing anything, it stopped working. The router says external networks are unreachable.

11:27:15.282434 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 16) 2602:24a:de45:bf70:217:f2ff:fe0d:ca5e > 2607:f8b0:4005:802: [icmp6 sum ok] ICMP6, echo request, length 16, seq 3
11:27:15.282899 IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 2602:24a:de45:bf70::1 > 2602:24a:de45:bf70:217:f2ff:fe0d:ca5e: [icmp6 sum ok] ICMP6, destination unreachable, length 64, unreachable route 2607:f8b0:4005:802::1004


The weird thing is that the router (2602de45:bf70::1) lists its clients (2602:24a:de45:bf70:217:f2ff:fe0d:ca5e) as their own route.

Any ideas?

Tunnel config

tunnel.png (50.88 KiB) Viewed 2908 times

Routes

routes.png (42.81 KiB) Viewed 2908 times

[nsmiller]

What happens if you change the LAN Prefix Assignment from "Configure to RA and DHCPv6 automatically" to "Configure to RA automatically"?

[kevinmcm]

No change. Not even the router itself can reach outside IPv6 addresses.