Dual WAN Setup - LAN interfaces lost their IPv6 adresses.

heiko3001

@Gertjan
I think you misunderstand me...

I have to trigger that it works. I do this by turning the VDSL Interface off and on and again.

After a clean restart IPv6 is not working and I get the error message above (Permission denied- transmit failed)
Then I trigger the VDSL interface by turning it off and on, then it takes a few seconds and all LAN interface have a working IPv6 connection.

stephenw10

Do you see any Received RA messages in the main system log?

If not do you have 'Do not wait for a RA' set in the dhcpv6 client setup?

It sounds like you may need that.

Also are you using if_pppoe in 2.8?

Gertjan

@heiko3001 said in Dual WAN Setup - LAN interfaces lost their IPv6 adresses.:

I do this by turning the VDSL Interface off and on and again.

That's what I understood.
The dhcp6c gets started when the WAN interface becomes active.
And then it fails with the message "Transmit failed - Permission denied" which means : the interface is down (again).

Or, is this something else :

at 04h42:31 a solicit is send - it does this very often, I see Solicit every 300 seconds or so.
at 04h46:27 same thing, 116 seconds later,
at 04h46:35 same thing, 8 seconds later .... wow...
at 04h46:35 This solicit failed - interface gone.

If you saved the WAN config at that moment - between 46:27 and 46:35 - then I presume the dhcp6c would log would show a lot more - like the logs you've showed above.

Btw : Not sure if this is related - dhcprelay - are you using dhcprelay ?

heiko3001

@Gertjan

Yes I use a DHCP Relay. DHCP Server runs on Windows Server 2025.

Gertjan

@heiko3001

Same interface ?
Or another interface that went (also) down ?

heiko3001

@Gertjan Yes, it is on the same Interface, but only v4.
For IPv6 I deactivated DHCPv6 (on the Pfsense) and at the moment I run only Slaac / Router Advertisement.

stephenw10

Hmm, so you are passing a prefix delegation from your ISP to an internal dhcpv6 server?

Please show how your pppoe interface is configured. Is it set to prefix only? Is it set for 'do not wait for RA'?

heiko3001

@stephenw10

No, the DHCP Relay is only for my internal LAN-Interface, and only IPv4, I think this was an missunderstanding.

and one of the LAN Interfaces (called EXT)

stephenw10

If you uncheck 'do not wait for RA' does it eventually receive an RA and complete the connection?

Edit: So when this happens it loses the PD but not the address on the WAN directly?

heiko3001

@stephenw10 I will give it a try, and give a feedback after.