SOLVED (was Re: Problem clarification (was: Problems with vlan + carp + alias))

[Peter Jeremy]

On 2008-Jun-27 22:59:56 +0200, Giulio Ferro <auryn at zirakzigil.org> wrote:
>Peter Jeremy wrote:
>> The kernel should send out gratuitous ARP requests whenever you assign
>> an address to an interface.  You could confirm that this is happening
>> by tcpdumping the interface whilst you add aliases.
>>   
>I have bad news for you all: this doesn't seem to happen for alias
>interfaces.  I've just tried to replicate what happened days
>ago. I've verified that only the base (non alias) interface sends
>proper is-at messages. The aliases don't....

I'm not seeing this on physical interfaces.  I can't immediately verify
this on VLAN interfaces but could at work next week.

Adding 192.168.123.253 as an alias on FreeBSD 7.0-STABLE (mid May):
08:21:39.899113 00:0f:b0:74:9c:a3 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: arp who-has 192.168.123.253 tell 192.168.123.253

Adding 192.168.123.253 as an alias on FreeBSD 6.3-PRERELEASE:
08:24:21.077266 00:12:0e:20:2b:ad > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: arp who-has 192.168.123.253 tell 192.168.123.253

-- 
Peter Jeremy
Please excuse any delays as the result of my ISP's inability to implement
an MTA that is either RFC2821-compliant or matches their claimed behaviour.
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