Static routes stuck in dormant state (interface discovery broken?)

[Kenth Eriksson]

On Tue, 2018-09-18 at 14:27 +0200, Ondrej Zajicek wrote:
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> On Tue, Sep 18, 2018 at 08:38:56AM +0000, Kenth Eriksson wrote:
> > Hi!
> > 
> > I'm using BIRD 2.0.2 and have trouble with static routes that gets
> > stuck in dormant state.  It looks as the problem happens if the
> > static route is pushed into BIRD config before the interface
> > exists. BIRD detects when interfaces go up and down, but misses
> > when interfaces are added. The only way I have found to kick BIRD
> > out if this state is to issue another configure command after the
> > interface exists.
> > 
> > Reproducing this is very easy, simply add a static route over a
> > sub-interface that is not yet created, this leaves the route in
> > dormant state
> 
> Hi
> 
> Works for me:
> 
> # ./birdc -l show static static4
> BIRD v2.0.2-40-g0ed3129f-x ready.
> 10.10.10.0/24
>     dev ve0.10 (dormant)
> 
> # ./birdc -l show route 10.10.10.0/24
> BIRD v2.0.2-40-g0ed3129f-x ready.
> Network not found
> 
> 
> # vconfig add ve0 10
> Added VLAN with VID == 10 to IF -:ve0:-
> 
> # ifconfig ve0.10 up
> 
> 
> # ./birdc -l show static static4
> BIRD v2.0.2-40-g0ed3129f-x ready.
> 10.10.10.0/24
>     dev ve0.10
> 
> # ./birdc -l show route 10.10.10.0/24
> BIRD v2.0.2-40-g0ed3129f-x ready.
> Table master4:
> 10.10.10.0/24        unicast [static4 14:21:18.093] * (200)
>     dev ve0.10
> 
> Although i am trying it on current int-new Git branch, i don't see
> any
> relevant changes since v2.0.2
> 
> Could you try it with enabled 'debug all' for static and device
> protocols
> and report the logs?
> 
> --
> Elen sila lumenn' omentielvo
> 
> Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
> OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3,
> wwwkeys.pgp.net)
> "To err is human -- to blame it on a computer is even more so."

See traces below; the static protocol picks up the interface when I'm
reconfiguring BIRD. This happens for PPC32 with libc-2.12.2.so and
Linux 4.14.51+. But I'm also able to see this on x86 (4.14.70).  

2018-09-18 15:25:33.304 <TRACE> device1: Scanning interfaces
2018-09-18 15:25:38.303 <TRACE> device1: Scanning interfaces
2018-09-18 15:25:43.304 <TRACE> device1: Scanning interfaces
2018-09-18 15:25:44.299 <INFO> Reconfiguring
2018-09-18 15:25:44.299 <TRACE> static1 > added [best] 172.24.1.0/24
unicast
2018-09-18 15:25:44.299 <TRACE> static1: Reconfigured
2018-09-18 15:25:44.299 <TRACE> device1: Reconfigured
2018-09-18 15:25:44.299 <INFO> Reconfigured

Can you give me your git sha you are running on? I can re-test on that
and see if it makes a difference.

Thanks,
Kenth