CARP VIP link local vs IPv6 communication

[GreenMatter]

I'm not able to set CARP VIPs for link local addresses (https://docs.opnsense.org/manual/how-tos/carp.html#setup-virtual-ipv6-link-local-address) to make IPv6 communication flowing. RA announces current, physical link local ipv6 address as router which is different than CARP VIP. I've tried setting fe80::/64 and fe80::1/64  as CARP VIP without any luck...

But as I use tunnelbroker I can't use my ipv4 WAN interface to set up CARP VIP (https://docs.opnsense.org/manual/how-tos/carp.html#setup-virtual-ipv6-global-unicast-address) and I think this should have been my GIF interface...(?) And if I set next hop, either tunnel remote or local address as CARP VIP address, VIP remains as disabled...

How to set it up properly?

[Patrick M. Hausen]

fe80::/64 is not a valid address but fe80::1/64 should be fine. I use fe80::<VLAN ID>/64 everywhere.

Please show a screenshot of

- the interface configuration of both units
- the CARP VIP configuration on the active/master (should propagate to the standby once you do a configuration sync)

[GreenMatter]

- the interface configuration of both units
- the CARP VIP configuration on the active/master

So, I adjusted local link addresses - as per your advice to make sure they are different

I couldn't attached screenshots here as limit is only 250 kB (?)
Link to listed below screenshots: https://imgur.com/a/r9RSFma
Master interface: 
Backup interface:
CARP VIP global (I had multicast, same issue, so I tried unicast)
CARP VIP local:


VHID groups are fine, initially I synchronised CARP VIPs, later I changed them to unicast.
So, where's mistake???

[Patrick M. Hausen]

I block so called image hosting sites, sorry.

This works.

Interface configuration on the primary node:



CARP VIP:



Radvd config:



HTH,
Patrick

[GreenMatter]

Radvd config:

Thanks!
Can you confirm, do you use: Services -> Router Advertisements? Because I don't have any dropdown list to choose from...

[Patrick M. Hausen]

I use Services: Router Advertisements. I don't recognise your screen shot.

[meyergru]

Patrick, my settings look like the one above, as well. Your seems to be from an old version or the business version. There is no dropdown in "Source Adress" with 26.1.4, not even when a CARP VIP exists on the interface.

[Patrick M. Hausen]

Yes, the setup in question is BE 25.10.