OSPF HELLO wrong mask

[Slawa Olhovchenkov]

On Wed, May 15, 2013 at 07:29:04PM +0200, Ondrej Zajicek wrote:

> On Wed, May 15, 2013 at 08:33:08PM +0400, Slawa Olhovchenkov wrote:
> > > Interesting
> > > What 'show interfaces' and 'show ospf interface' return?
> > > And also 'show status' for router id.
> > 
> > ifconfig em0 (full)
> > em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> >         options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
> >         ether 68:05:ca:0e:d3:e1
> >         inet 10.254.0.2 netmask 0xffff0000 broadcast 10.254.255.255
> >         inet6 fe80::6a05:caff:fe0e:d3e1%em0 prefixlen 64 scopeid 0x1 
> >         inet 185.17.0.1 netmask 0xffffff00 broadcast 185.17.0.255
> >         inet 185.17.1.1 netmask 0xffffff00 broadcast 185.17.1.255
> >         inet6 2a03:e2c0:0:1::1 prefixlen 64 
> >         inet 185.17.2.1 netmask 0xffffff00 broadcast 185.17.2.255
> >         inet 185.17.3.1 netmask 0xffffff00 broadcast 185.17.3.255
> >         inet 10.90.90.1 netmask 0xfffffff0 broadcast 10.90.90.15
> >         inet 193.93.192.1 netmask 0xfffffc00 broadcast 193.93.195.255
> >         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> >         media: Ethernet autoselect (1000baseT <full-duplex>)
> >         status: active
> 
> So this is a problem with multiple IPs on an iface. On BSD, we support
> just one primary address in OSPF (others are just handled as stubs).
> Lexicographically smallest address was chosen. Unfortunately the kernel
> chose a different one as a source address.

Why lexicographically smallest?
Why not first from getifaddrs() list?

> If you use multiple IPs on an iface in BSD with BIRD, you have to 
> use option 'primary' of device protocol to specify the proper one:
> http://bird.network.cz/?get_doc&f=bird-6.html#ss6.2

10x, working.