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

[Ondrej Zajicek]

On Tue, Sep 18, 2018 at 02:14:35PM +0000, Kenth Eriksson wrote:
> On Tue, 2018-09-18 at 14:27 +0200, Ondrej Zajicek wrote:
> > CAUTION: This email originated from outside of the organization. Do
> > not click links or open attachments unless you recognize the sender
> > and know the content is safe.
> > 
> > 
> > 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

So there are no log messages when interface is created and enabled?


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

I am running on a043f2d79488cdfbc4d97ac0bad4926d29bf9a82 (int-new branch)

-- 
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."