Lit Fibre (UK) IPv6 stopped after powercut

JKnott

@F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

I'm at a loss, i'm not touching anything apart from a router reboot, ISP are advising from a network point they can't see an issue and to plug the Calix RG router back in.

I still suspect it has something to do with merging the 2 ISPs.

I know it can be real FUN trying to get ISP support to admit they have a problem. Also, those 5 port switches are fairly cheap, so perhaps you can buy one if you don't already have something suitable.

Gertjan

@F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

First step was to check the internet was actually down

Note these on an post-it :

ipconfig /all
ipconfig /renew
ipconfig /renew6

The second renews the IPv4 lease. If it times out : DHCP4 isn't running ?
The third : IPv6 lease gets renewed. If error, DHCOPv6 server isn't running ? (or no more prefix for that LAN, etc)

Be ware : IPv6 is default, so if "ping www.google.com" will use IPv6. Force it to use IPv4 by entering :

ping -4 www.google.com

or the other way around :

ping -6 www.google.com

@F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

only IPv6 traffic worked and IPv4 was a no go

Welcome into 2025, Yes, DHCP4v should be stable right these days.
If any doubts, use the DHCPv4 server (on pfSense) that is known to be good : use ISC. You are using kea right now.

kea works fine, I'm using it for month now, but I have the more recent 24.11 (and 25.03 now).
IMHO : If you have to offer your wife a depreciated (but 3 decades proven) DHCPv4 server, or a 'beta' (implementation) Kea, go for the first - or get a lawyer ^^