bgpd bug with announcing /24 networks.

[Xavier Beaudouin]

Hi there,

I currently use openbsd bgpd (w/ openbsd 3.6) with announcing /24 but it
seems that bgpd removes the /24 when announcing to peers.

Config :


peer="10.1.1.1"

# global configuration
AS 65789
router-id 10.218.105.1
holdtime 180
holdtime min 3
listen on 10.1.1.2
listen on 10.218.105.1
#fib-update no
fib-update yes
# route-collector yes
log updates
network 10.218.105.0/24

neighbor $peer {
        remote-as       65345
        descr           Peer 1
        multihop        20
        local-address   10.1.1.2
        announce        self
}

# filter out prefixes longer than 24 or shorter than 8 bits
deny from any
allow from any prefixlen 8 - 24

# do not accept a default route
deny from any prefix 0.0.0.0/0

# filter bogus networks
deny from any prefix 10.0.0.0/8 prefixlen >= 8
deny from any prefix 172.16.0.0/12 prefixlen >= 12
deny from any prefix 192.168.0.0/16 prefixlen >= 16
deny from any prefix 169.254.0.0/16 prefixlen >= 16
deny from any prefix 192.0.2.0/24 prefixlen >= 24
deny from any prefix 224.0.0.0/4 prefixlen >= 4
deny from any prefix 240.0.0.0/4 prefixlen >= 4


Result on a peer :

*  10.218.105.0    10.1.1.2                          0 65789 i

As we see we don't get any /24 announce

example of a /24 announce of peer:

*> 10.18.208.0/24   10.28.3.183         1000             0 65257 i
*> 10.18.210.0/24   10.28.3.183         1000             0 65257 i

Is there any problem on my configuration or is this a software bug ?

Thanks,
/Xavier