Hi,

On NetBSD/powermac have a program where I use ioctl SIOCAIFADDR to add
an alias to lo0. I add 192.168.127.26/255.255.255.0. Ifconfig -A lo0
then tells me:

lo0: flags=8009<UP,LOOPBACK,MULTICAST> mtu 33228
        inet 127.0.0.1 netmask 0xff000000
        inet alias 192.168.127.26 netmask 0xffffff00

And netstat -rn:

127                127.0.0.1          UGRS        0        0  33228 lo0
127.0.0.1          127.0.0.1          UH          1       64  33228 lo0
192.168.127.26     192.168.127.26     UH          0        0  33228 lo0

This looks perfectly alright to me, but when I try to ping
192.168.127.26, I get:

PING 192.168.127.26 (192.168.127.26): 56 data bytes
ping: sendto: No route to host
ping: sendto: No route to host
^C


Now, if I add the same alias, using ifconfig:

ifconfig lo0 192.168.127.26 netmask 255.255.255.0 alias

I get the exact same output from ifconfig -A lo0 and netstat -rn as
when I added it using my program, but now I can suddenly ping it. 

I've been trying to read the source of ifconfig to see if it does
anything more than SIOCAIFADDR to set the alias, but I can't see that
it does. Can anyone enlighten me on this? 


Greetings,

Tomas