announce IPV4 loopback via an OSPF v3 backbone

[Benoit Chesneau]

correction: the error message is not related particularly to bird but seems related to this issue in latest freebsd release: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275341

Once fixed though, I have the same results. routes are not applied to the kernel. ospfv3. Applying a `/31` to the point to point interface:

```
vlan200: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 150
0
options=4600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6,MEXTPG>
ether 9a:c7:bd:e8:62:dc
inet 10.200.1.1 netmask 0xfffffffe broadcast 255.255.255.255
inet6 fe80::98c7:bdff:fee8:62dc%vlan200 prefixlen 64 scopeid 0x4
groups: vlan
vlan: 200 vlanproto: 802.1q vlanpcp: 0 parent interface: iavf0
media: Ethernet autoselect (10Gbase-SR <full-duplex>)
status: active nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
```

allows the route to be shared . Configuration is :

```
protocol ospf v3 ospfv4 {
ipv4 {
import filter ospf_import;
export filter ospf_export;
};

area 0 {
interface "lo1" { stub yes; };
interface "vlan200" {
type ptp;
cost 10;
};
};}
```

Benoît Chesneau, Enki Multimedia
—
t. +33608655490

Sent with [Proton Mail](https://proton.me/) secure email.

On Sunday, March 31st, 2024 at 01:42, Benoit Chesneau <benoitc at enki-multimedia.eu> wrote:

> I get the same result as well. On freebsd when starting I also get this message " Cannot find next hop address".
>
> Benoît
>
> On Saturday, March 30th, 2024 at 16:04, Pim van Pelt via Bird-users <bird-users at network.cz> wrote:
>
>> Hoi,
>>
>> On 3/30/24 15:50, Pim van Pelt wrote:
>>
>>> OSPFv3 adjacency did establish, but no routes were exchanged (also none with filter 'export all; import all;') --
>>
>> As a quick follow up to this: routes are exchanged, but they are not emitted to the kernel.
>> root at vpp0-2:~# birdc show ospf state
>> BIRD 2.14 ready.
>>
>> area 0.0.0.0
>>
>> router 192.168.10.2
>> distance 0
>> router 192.168.10.3 metric 5
>> stubnet 192.168.10.2/32 metric 0
>> stubnet 192.168.10.2/32 metric 0
>> stubnet 192.168.10.2/32 metric 0
>> external 192.168.10.2/32 metric2 10000
>> external 192.168.10.0/24 metric2 10000
>>
>> router 192.168.10.3
>> distance 5
>> router 192.168.10.2 metric 5
>> stubnet 192.168.10.3/32 metric 0
>> stubnet 192.168.10.3/32 metric 0
>> stubnet 192.168.10.3/32 metric 0
>> external 192.168.10.3/32 metric2 10000
>> I am not seeing any Netlink route messages for any of the LSAs from neighbor 192.168.10.3 (colored in red above).
>> Could it be that when using an ipv4 channel with OSPFv3, Bird ought to program these across address families?
>>
>> pim at vpp0-2:~$ sudo ip ro add 192.168.10.3/32 via inet6 fe80::5054:ff:fef0:1130 dev e1
>> groet,
>> Pim
>>
>> --
>> Pim van Pelt
>> PBVP1-RIPE -
>> https://ipng.ch/
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