Hi
The ISP-side router needs to know that it must route the /64s to your
router.
Most of the time this is done via DHCPv6/PD (PD stands for
Prefix-Delegation). You won't be able to do this with bird.
Router advertisement do not do routing at all. It is just there to
auto-configure hosts.
Arnaud Houdelette-Langlois
Administrateur des infrastructures systèmes et réseaux
Normandie Université
+33 2 31 56 69 54
Le 26/04/2023 à 11:34, Alessandro Vesely a écrit :
On Tue 25/Apr/2023 19:12:13 +0200 Kevin P. Fleming wrote:
On Tue, Apr 25, 2023, at 12:40, Alessandro Vesely wrote:
I don't know what protocol I need. It is a new question. I should
know what protocol is using the next hop on ppp0 (default gw). I'm
not even sure what IPv6 hosts are out there; traceroute shows
nothing. Running traceroute from an external site I find that,
wherever the trace starts from, it falls into a loop:
It might be best to back up a bit here. Can you describe the
scenario: what is the network topology, and what requirements are
placed on you by any upstream or downstream networks? In addition to
those, what are your goals in using Bird?
I changed ISP, and they assigned me a /56 of IPv6 addresses. My
previous experience with IPv6 was using a tunnel offered by route48
for free. In that case, I just plugged it in and it worked. With my
new ISP, I configured a couple of addresses on the interface (ppp0,
they use PPPoE) but saw no IPv6 traffic. I opened a ticket at the
ISP, they said something wrong on my side.
I set up a /64 to use internally, and saw IPv6 works on the internal
network. One internal user even managed to synthesize an IPv6 address
in that range and connect to the server via WiFi. IPv6 on the lan is
not a problem.
I tried https://tools.keycdn.com/traceroute, and saw there is a loop.
I had seen routing loops before, in IPv4, and they were usually errors
in some static table somewhere. My ISP repeated that everything is
fine on their side. So I derived I need some routing.
Bird does not actually *route* traffic at all, please keep that in
mind. It is a routing table (FIB) manager, with a little bit of extra
functionality for IPv6 Router Advertisements and some other bits. It
gathers route information from a variety of sources, combines it
together in the ways you tell it to, and then publishes some (or all)
of it to the destinations you configure.
My understanding of radv is that it finds neighbors by itself. Should
I configure any? And can I check what hosts it found?
Since it may not even be the right tool for the problem you are
trying to solve, it would be helpful if you could describe the
problem first. With that information the Bird user community can
suggest ways Bird might be applicable, if it is.
The main problem is that my addresses, e.g. 2a02:29e1:300:e900::1, are
not reachable from the wan. Symmetrically, I don't seem to be able to
reach any external host on IPv6. The only hint that the interface
works at all on IPv6 is that nmap says "Host is up." How can I get
some visible reply from those hosts (2a02:29e1::a
2a02:29e0:109:ff00::5 2a02:29e0:255::2)?
Best
Ale
