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On Wed, Oct 29, 2003 at 08:54:54AM +0100, frederic.buche@xxxxxxxxxx wrote:
> This loopback interface (lo:0) has the hidden parameter set.
>
> eth0 = 192.168.121.240
> eth0:1 = 192.168.121.242
> lo:0 = 192.168.121.242
>
> If the interface eth0:1 is not mounted I would expected that a ping on
> 192.168.121.242 do not reply.
> But it does.
>
> Perhaps I do not have understood exactly the purpose of "hidding", but I
> thought this architecture coud work.
If you stetup looks like this
eth0 = 192.168.121.240
lo:0 = 192.168.121.242
And the loopback interface is hidden.
Then this machine should not respond to arp requests for 192.168.121.242.
Check the arp packets using tcpdump -n -e -i eth0 arp and host 192.168.121.242
to see what machines are responding to arp requests for 192.168.121.242
Also, examine the arp table on the host that is sending the ping
packets, perhaps the mac address is cached.
--
Horms
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