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Date: Tue, 20 Jan 2009 09:29:45 -0500
From: Steve Bertrand <steve@ibctech.ca>
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To: "Patrick M. Hausen" <hausen@punkt.de>
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Cc: freebsd-stable@freebsd.org,
	Wendell Martins Borges <wendell@ramenzoni.com.br>
Subject: Re: aliases not working in em0
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Patrick M. Hausen wrote:
> Hi, all,
> 
> On Tue, Jan 20, 2009 at 08:52:18AM -0500, Steve Bertrand wrote:
>> For how long? On a 7.0-R box, it works ok with a /32 prefix len:
>>
>> %ifconfig
>> re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>>         options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
>>         ether 00:0f:b5:80:53:85
>>         inet 208.70.104.210 netmask 0xffffff00 broadcast 255.255.255.192
>>         inet 208.70.104.211 netmask 0xffffff00 broadcast 255.255.255.255
> 
> Did you manually edit the ifconfig output? The broadcast addresses
> should both be 208.70.104.255 for the shown prefixes and netmasks.

Hmmm... thats my bad. I have a fsck-up in my rc.conf on that box...

ifconfig_re0="inet 208.70.104.210 255.255.255.192"
ifconfig_re0_alias0="inet 208.70.104.211 255.255.255.255"

I guess when one leaves out the 'netmask' keyword, the next parameter
after the IP becomes the broadcast address.

I'm actually quite surprised and perplexed as to how this box has been
able to communicate to other prefixes on the network :)

Thanks for the keen eye. You've most certainly saved me some future anguish!

Steve