Bird2 not distributing IPv6 address on dummy to OSPF

[NitrouZ]

Hi,

For some reason MikroTik have problem when using /127-/128. It will works
well when using /126.

Br,
Dewangga

On Tue, 28 Sep 2021 at 16.12 Blažej Krajňák <blazej.krajnak at gmail.com>
wrote:

> Hello everyone,
>
> I just found that neighbour router Mikrotik has the LSA in table. So I
> incorrectly mentioned that Bird2 is not advertising route. But that
> route does not appear in Mikrotik routing table. I compared the same
> configuration with Quagga (which works correctly) and the difference
> between LSAs is LA option bit.
>
> NOT WORKING:
> referenced-LS-type=Router LSA
> referenced-LS-ID=0
>     prefix=2a02:6ca3:0:2::25/128 options=01000000  (LA)
>
>
> WORKING:
> referenced-LS-type=Router LSA
> referenced-LS-ID=0
>     prefix=2a02:6ca3:0:2::2/128 options=00000000
>     prefix=2a02:6ca3:0:2::3/128 options=00000000
>     prefix=2a02:6ca3:0:2::4/128 options=00000000
>
>
> According to RFC5340:
>
> LA-bit
>       The "local address" capability bit.  If set, the prefix is
>       actually an IPv6 interface address of the Advertising Router.
>       Advertisement of local interface addresses is described in
>       Section 4.4.3.9.  An implementation MAY also set the LA-bit for
>       prefixes advertised with a host PrefixLength (128).
>
> So does it mean that Mikrotik does not understand "MAY implementation"
> of LA-bit for host PrefixLength (128)?
>
> ut 28. 9. 2021 o 1:15 Blažej Krajňák <blazej.krajnak at gmail.com>
> napísal(a):
> >
> > Hello,
> >
> > I just installed fresh Debian 11 server and I need to distribute IPv6
> > /128 address from dummy1 interface to OSPF. Direct protocol see that
> > address, but neighbour not. Am I missing something?
> >
> >
> > ip -6 route
> > 2a02:6ca3:0:2::25 dev dummy1 proto bird metric 32 pref medium
> > 2a02:6ca3:0:2::25 dev dummy1 proto kernel metric 256 pref medium
> >
> > bird> show route table master6
> > Table master6:
> > 2a02:6ca3:0:2::25/128 unicast [ospf2 00:32:34.008] I (150/0)
> [172.20.12.25]
> > dev dummy1
> >
> >
> > log syslog all;
> > router id 172.20.12.25;
> > protocol device {
> > }
> > protocol direct {
> >         disabled;               # Disable by default
> >         ipv4;                   # Connect to default IPv4 table
> >         ipv6;                   # ... and to default IPv6 table
> > }
> > protocol kernel {
> >         ipv4 {
> >               export all;
> >         };
> > }
> > protocol kernel {
> >         ipv6 {
> >                export all;
> >         };
> > }
> > protocol static {
> >         ipv4;
> > }
> > protocol static {
> >         ipv6;
> > }
> > protocol ospf v2 {
> >         ipv4 {
> >                 import all;
> >         };
> >         area 0 {
> >                 interface "ens192" {
> >                         type broadcast;
> >                 };
> >                 interface "dummy1" {
> >                         stub;
> >                 };
> >         };
> > }
> > protocol ospf v3 {
> >         ipv6 {
> >                 import all;
> >         };
> >         area 0 {
> >                 interface "ens192" {
> >                         type broadcast;
> >                 };
> >                 interface "dummy1" {
> >                         stub;
> >                 };
> >         };
> > }
>
> --
Sent from iDewangga Device
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