Re: virtual interfaces

[Adam Aube <aaube01@baker.edu>]

Antonio Rodriguez wrote:
> On Sun, Dec 05, 2004 at 11:07:55PM +1100, Sam Watkins wrote:
>> On Sat, Dec 04, 2004 at 11:07:08AM -0500, Antonio Rodriguez wrote:

>> > 1. adding the needed paragraph to /etc/network/interfaces to reflect
>> > the virtual iface with 'anotherIP',
>> > 2. adding the corresponding file in /etc/apache2/sites-available,
>> > 3. creating the symlink in /etc/apache2/sites-enabled
>> > 4. stopping, starting, reloading again networking and apache2

>> > still can't get the added domain to respond. My question is: is there
>> > any other step that I am missing, or should I make the assumption that
>> > the 'anotherIP' is not pointing to my physical machine?

>> Did you type "ifconfig" to check that the IP alias is set up?
>> it should show up as eth0:1 or whatever number you gave it.

>> can you ping the new IP address from the machine running apache2?
>> what about from a different machine?

> Here is what happens:
> dedicated-deb-17boom:/etc/apache2# ping 'anotherIP'
> PING 'anotherIP' ('anotherIP') 56(84) bytes of data.
>>From 'mainIP' icmp_seq=1 Destination Host Unreachable
>>From 'mainIP' icmp_seq=2 Destination Host Unreachable
>>From 'mainIP' icmp_seq=3 Destination Host Unreachable

> It seems to be a configuration problem in my side, here is what I
> have:

> dedicated-deb-17boom:/etc/apache2# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:01:29:94:A2:1B
>           inet addr:'mainIP'  Bcast:'mainIPfragment'.255 

> eth0:0    Link encap:Ethernet  HWaddr 00:01:29:94:A2:1B
>           inet addr:'anotherIP'  Bcast:'mainIPfragment'.255 

Here's the problem - eth0 and eth0:0 are identical, so you have defined the
interface twice.

> and also 'cat /etc/network/interfaces' shows

> # The secondary network interface (virtual 1)
> auto eth0:0
> iface eth0:0 inet static

Change these to eth0:1 and you should be all set.

Adam