Multiple IP addresses without aliasing?

Ryan Lynch ryan.b.lynch at gmail.com
Fri Aug 28 22:04:37 UTC 2009


On Fri, Aug 28, 2009 at 17:59, Mike Wright<mike.wright at mailinator.com> wrote:
> Ryan Lynch wrote:
>>
>> On Fri, Aug 28, 2009 at 17:36, Sam Varshavchik<mrsam at courier-mta.com>
>> wrote:
>>>
>>> Ryan Lynch writes:
>>>
>>>> Do the Fedora network init scripts support additional secondary IP
>>>> addresses without the use of alias labels?  Does an option for IPv4
>>>> addresses exist that works like IPV6ADDR_SECONDARIES?
>>>>
>>>> I just skimmed /usr/share/doc/initscripts-*/sysconfig.txt, but I
>>>> didn't see anything to that effect, so I'm guessing the answer is no,
>>>> and I have to use aliases and 'ifcfg-eth?:0' files.
>>>
>>> Yes, at least for IPv4. There is absolutely no support from the GUI, but
>>> you
>>> can manually install /etc/sysconfig/network-scripts/ifcfg-ethX:Y. For
>>> example, I have an ifcfg-eth1 and an ifcfg-eth1:1, with a second IP
>>> address.
>>> Just copy ifcfg-ethX to ifcfg-ethX:1, and stick in an additional IP
>>> address.
>>
>> That's exactly what I'm trying to avoid--I don't want Fedora to add
>> the 'eth0:0', 'eth0:1', etc. labels.  I'm wondering if the init
>> scripts support multiple addresses WITHOUT aliases.
>>
> I've never been able to find a solution to that that didn't require running
> another script.  /etc/rc.local is a kind of "catch all".  There are also
> /etc/sysconfig/network-scripts/ifup-post and ifdown-post.
>
> Using iproute2 certainly gives good control.
>
>  ip address add 10.20.30.40/8 dev eth0
>  ip address add 10.20.30.41/16 dev eth0
>  ip address add 10.20.30.42/24 dev eth0
>  ip address add 10.20.30.43/32 dev eth0
>  ip address add 192.168.1.1/24 dev eth0
>
> is an example of how to add addresses to an interface.
>
> You may also use the same command to setup routes for your new found
> diversity of addresses :)

I'm familiar with the manual method.  What I'm wondering, now, is
whether the init scripts support any method that achieve the same
effect.

-R




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