IPv6 at Telenet, Belgium

[cloudz]

If you end up with a non-working IPv6 deployment on Telenet after years of trusty performance, it's not you.

Telenet started a roll-out of new firmware to their modems. You notice this by IPv6 not (reliably) working in the morning. Updates are done at night.

The only thing you need to do is change the Prefix delegation size from 60 to 57.

[asansi]

Thanks a bunch, was wondering if it was my config, glad I came across this post

[anilv26]

I have IPv6 on the WAN and LAN but no RA or IPv6 dhcp on the clients.
It was working before I upgraded to release 24 of Opnsense, I have changed the PD to 57.

May I ask what your IPv6 setup is for Telenet? I have the E router in bridge mode.
And why did Telenet change it to 57?
I'm a bit of a network noob   .

Thanks in advance.

[asansi]

For me I also have the E-router in bridge mode. (CV8560E)
Think these are the main config settings regarding IPv6 setup :

Interfaces :

WAN side : DHCPv6
Prefix Delegation size : 57 (this was 60 before, but stopped working recently, until I saw cloudz post to update it )
Send IPv6 prefix hint : enabled.  Other options are not enabled.

Internal side : Track Interface
IPv6 Track Interface : WAN
IPv6 Prefix ID : 0
Manual configuration : Enabled

DMZ side : Track Interface
IPv6 Track Interface : WAN
IPv6 Prefix ID : 1
Manual configuration : Enabled

Services :

ISC DHCPv6 :
Enabled the DHCPv6 server on each interface, Range from ::1 to ::ffff:ffff:ffff:ffff
DNS Servers : (my own dns server ip)

Router Advertisements :
RA : Managed
RP : Normal
Advertise default gateway : enabled
DNS Servers : again, my own ip's

Hope this helps...

[cloudz]

I'm using the most basic setup.
No hints, track the interface and prefix from 0 > F depending on the VLAN I'm assigning it to.
No manual setups with DHCP or anything.

I might look into the setup by asani.

They've changed it so you now always get the same /57 on your router, it seems.

[AverageR]

I've noticed my IPv6 was behaving strangely. Changed the prefix and it's back to normal.
Thank you!