Weird behavior on Bird 2.0.8 with Wireguard PtP links and OSPFv3

[Skyler Mäntysaari]

Hi there,

I'm not sure if anyone else has seen this issue but I have been getting 
this issue repeatably today, where OSPFv3 just stops working due to "bad 
DBDES packet from nbr", I haven't changed anything and it has been 
working fine for months.

What's the best way to troubleshoot this?

The neighbor starting with 193. is a Debian 10 machine, 185 and 
192.168.2.1 are EdgeOS running Bird 2.0.8.

2021-08-31 17:23:53 <RMT> ospfv3_v4: Bad DBDES packet from nbr 
192.168.2.1 on wg0 - I-bit mismatch (7)
2021-08-31 17:23:53 <RMT> ospfv3_v6: Bad DBDES packet from nbr 
193.xxx.xxx.223 on wg1 - I-bit mismatch (7)
2021-08-31 20:38:41 <RMT> ospfv3_v6: Bad DBDES packet from nbr 
185.xxx.xxx.130 on wg0 - too late for DD exchange (7)

OSPF3 configuration:
-------------------------------------------------------------------------------------------------
protocol ospf v3 ospfv3_v4 {
         ipv4 {
          import filter internel_prefixes;
          export filter internel_prefixes;
          #export where (source = RTS_STATIC) || (source = RTS_DEVICE);
         };

         area 0.0.0.0 {
            interface "lo*" { stub; };
            interface "tun0" { type ptp; cost 10; stub no; };
            interface "wg0" { type ptp; cost 20; stub no; };
            interface "wg1" { type ptp; cost 30; stub no; };
         };
}

protocol ospf v3 ospfv3_v6 {
         ipv6 {
          import filter internel_prefixes;
          export filter internel_prefixes;
          #export where (source = RTS_STATIC) || (source = RTS_DEVICE);
         };

         area 0.0.0.0 {
            interface "lo*" { stub; };
            interface "tun0" { type ptp; cost 10; stub no; };
            interface "wg0" { type ptp; cost 20; stub no; };
            interface "wg1" { type ptp; cost 30; stub no; };
         };
}
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