Missing IPv6 default route on protocol kernel and table master6

Bernd Naumann bernd at kr217.de
Thu Oct 6 20:39:04 CEST 2022


On 2022-10-06  15:11, Ondrej Zajicek wrote:
> On Thu, Oct 06, 2022 at 11:37:18AM +0200, Bernd Naumann via Bird-users wrote:
>> I may should have had a look at the log before :/
>>
>> ```
>> Thu Oct  6 09:32:51 2022 daemon.err bird: KRT: Received route ::/0 with
>> strange next-hop fe80::f6cc:55ff:fe42:1a94
>> ```
>>
>> But why is this a strange a next-hop? Routes with via Link-Local next-hop
>> just work fine with OSPF and BGP, whats the issue here?
> 
> Hi
> 
> That error message means the next hop was not found in interface address
> ranges. I do not see why link-local next hops should not work. What is
> your output from command 'show interfaces'?
> 

Hey Ondreh,
Thanks for having a look.

```
root at cpe:~# ip -6 addr show dev pppoe-wan
35: pppoe-wan: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1492 qdisc 
fq_codel state UNKNOWN group default qlen 3
     inet6 2003:e4:bfff:XXXX:6c2f:796c:6521:7f54/64 scope global dynamic 
noprefixroute
        valid_lft 13960sec preferred_lft 1360sec
     inet6 fe80::6c2f:796c:6521:7f54/128 scope link
        valid_lft forever preferred_lft forever

root at cpe:~# birdc show interfaces
...
pppoe-wan up (index=35)
         PtP Multicast AdminUp LinkUp MTU=1492
         93.206.5.X/32 (Preferred, opposite 62.155.247.65, scope univ)
         2003:e4:bfff:XXXX:6c2f:796c:6521:7f54/64 (Preferred, scope univ)
         fe80::6c2f:796c:6521:7f54/128 (Preferred, scope link)
...
```

I assume you are only interested in the pppoe-wan interface right?


I have to admit I have no clear knowledge about pppoe, but maybe this is 
related to my issue here.
Because I do not have LLA with `/64` on pppoe-wan, but only `/128`.
My LLA, and the GW LLA, is present as a host-route (`/128`).

Thanks again.
Bernd


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