Hi,
I've got very simple config:
-- bird.conf --
log "/var/log/bird.log" { debug, trace, info, remote, warning, error, auth,
fatal, bug };
debug protocols all;
router id 172.0.0.1;
protocol kernel {
learn;
persist;
scan time 20;
export all;
}
protocol device {
scan time 10;
}
protocol static {
route 0.0.0.0/0 drop;
}
protocol ospf MyOSPF {
export all;
area 0.0.0.0 {
interface "dummy*" {
};
};
area 10.0.0.0 {
nssa;
interface "eth*" {
type nbma;
};
};
}
-- end --
If area 10.0.0.0 is commented it works as expected:
bird> s o l
Global
Type LS ID Router Age Sequence Checksum
0005 192.168.54.255 172.0.0.1 3 80000001 c588
0005 192.168.55.0 172.0.0.1 3 80000001 ba92
0005 0.0.0.0 172.0.0.1 3 80000001 cb22
0005 10.155.74.255 172.0.0.1 3 80000001 cc31
Area 0.0.0.0
Type LS ID Router Age Sequence Checksum
0001 172.0.0.1 172.0.0.1 2 80000001 ac9b
bird>
but if I uncomment it (area 10) default route is disapearing:
bird> sh ro
0.0.0.0/0 blackhole [static1 01:34] ! (200)
via 10.5.2.1 on eth0 [kernel1 23:50] (10)
10.5.2.0/24 dev eth0 [MyOSPF 23:51] * I (150/10) [172.0.0.1]
10.155.74.0/24 via 10.155.74.5 on tun0 [kernel1 23:50] * (10)
192.168.54.0/24 via 10.155.74.5 on tun0 [kernel1 23:50] * (10)
192.168.55.0/24 via 10.155.74.5 on tun0 [kernel1 23:50] * (10)
172.0.0.1/32 dev dummy0 [MyOSPF 23:51] * I (150/0) [172.0.0.1]
bird> s o l
Global
Type LS ID Router Age Sequence Checksum
0005 192.168.54.255 172.0.0.1 2 80000001 c588
0005 192.168.55.0 172.0.0.1 2 80000001 ba92
0005 10.155.74.255 172.0.0.1 2 80000001 cc31
Area 0.0.0.0
Type LS ID Router Age Sequence Checksum
0001 172.0.0.1 172.0.0.1 1 80000001 af97
0003 10.5.2.255 172.0.0.1 1 80000001 e2b1
Area 10.0.0.0
Type LS ID Router Age Sequence Checksum
0001 172.0.0.1 172.0.0.1 1 80000001 22b7
0003 172.0.0.1 172.0.0.1 1 80000001 847d
bird>
If the area 10.0.0.0 is stub or nssa default route is propagated in ospf.
After changing area 10 to normal area and reconfiguring bird log says:
<TRACE> MyOSPF: Going to remove LSA Type: 0005, Id: 0.0.0.0, Rt: 172.0.0.1,
Age: 3600, Seqno: 0x7fffffff
<TRACE> MyOSPF: Flushing AS-external-LSA for 0.0.0.0/0
<TRACE> MyOSPF: Flushing summary-LSA (id=0.0.0.0, type=3)
<TRACE> MyOSPF: Going to remove LSA Type: 0003, Id: 0.0.0.0, Rt: 172.0.0.1,
Age: 3600, Seqno: 0x7fffffff
<TRACE> MyOSPF: Flushing AS-external-LSA for 0.0.0.0/0
Why 0.0.0.0/0 is removed from ospf while other kernel routes not?
How redistribute it in multiple areas?
other info:
localhost:/tmp# ip ro sh
10.155.74.5 dev tun0 proto kernel scope link src 10.155.74.6
10.155.74.0/24 via 10.155.74.5 dev tun0
192.168.54.0/24 via 10.155.74.5 dev tun0
192.168.55.0/24 via 10.155.74.5 dev tun0
10.5.2.0/24 dev eth0 proto kernel scope link src 10.5.2.2
default via 10.5.2.1 dev eth0
lo: 127.0.0.1/8
eth0: 10.5.2.2/24
tun0: 10.155.74.6 peer 10.155.74.5/32
dummy0: 172.0.0.1/32
regards,
--
Łukasz
