Seems you didn't read my email carefully....
Here is what I wrote:

"Now I did the following set of operations:
1) ifconfig bla0 10.0.5.1 netmask 255.255.255.0
This changed the last entry in the "ifconfig -a" output to

bla0: flags=8800<SIMPLEX, MULTICAST> mtu 1500
        inet 10.0.5.1    netmask 0xffffff00

At the same time in the routing output is the following entry added:
Destination        Gateway            Flags     Refs     Use    Mtu
Interface
10.0.5/24          10.0.5.1              U           0        0         -
bla0

and now I could see the problem in /var/log/messages:
rtinit: wrong ifa (oxaaaaaa) was (oxbbbbbb)"


As you can see the command that I gave was 
"ifconfig bla0 10.0.5.1 netmask 255.255.255.0"

Please help
Rade
----- Original Message ----- 
From: <itojun@iijlab.net>
To: Radivoje Todorovic <radivojet@jaspur.com>
Cc: <tech-net@netbsd.org>
Sent: Tuesday, June 19, 2001 7:00 PM
Subject: Re: Bug or Feature 


> 
> >and now I could see the problem in /var/log/messages:
> >rtinit: wrong ifa (oxaaaaaa) was (oxbbbbbb)
> 
> what is the EXACT command you issued here?
> 
> itojun
>