aliases not working in em0

[Steve Bertrand]

Wendell Martins Borges wrote:
> I had a 7.0 server and my card worked fine, upgraded to 7.1 and aliases
> stopped working, below some information from my server.
> 
> # uname -a
> FreeBSD stewie.ramenzoni.com.br 7.1-RELEASE FreeBSD 7.1-RELEASE #0: Thu
> Jan  1 14:37:25 UTC 2009    
> root at logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
> 
> # ifconfig em0
> 
> em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
>         ether 00:15:17:16:bf:9a
>         inet 192.168.112.1 netmask 0xffffff00 broadcast 192.168.112.255
>         inet 192.168.112.181 netmask 0xffffffff broadcast 192.168.112.181
>         media: Ethernet autoselect (100baseTX <full-duplex>)
>         status: active
> 
> # cat /etc/rc.conf
> 
> ifconfig_em0="inet 192.168.112.1 netmask 255.255.255.0"
> ifconfig_em0_alias0="inet 192.168.112.181 netmask 255.255.255.255"

I'm confused. Given the /etc/rc.conf settings, the above ifconfig output
appears to be exactly what I would expect.

What is not working?

Steve