Re: Multiple IPs on a single network interface

[Johan Ehnberg <johan@ehnberg.net>]

This is definitely not a Solaris only feature. I don't know about 
Solaris that much, though.

Here's the relevant part from my /etc/network/interfaces:

auto lo eth0 eth1eth0:1 eth1:1

iface eth1 inet static
address 192.168.0.1
netmask 255.255.255.0

iface eth1:1 inet static
address 192.168.0.100
netmask 255.255.255.0  


Note that without including an interface the "auto" line, you'll have to 
bring it up yourself:

ifup [interface]

or

ifconfig [interface] up


Here's the relevant part from ifconfig:

eth1      Link encap:Ethernet  HWaddr 00:...
         inet addr:192.168.0.1  Bcast:192.168.0.255  Mask:255.255.255.0
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:1641124 errors:32 dropped:0 overruns:0 frame:36
         TX packets:1756695 errors:0 dropped:0 overruns:0 carrier:42
         collisions:40861 txqueuelen:100
         RX bytes:556431159 (530.6 MiB)  TX bytes:1737110125 (1.6 GiB)
         Interrupt:9 Base address:0xfc80

eth1:1    Link encap:Ethernet  HWaddr 00:... 
         inet addr:192.168.0.100  Bcast:192.168.0.255  Mask:255.255.255.0
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         Interrupt:9 Base address:0xfc80


Hope this helps, and if not, just ask for more.


David De Graff wrote:

> Johan,
>
> This method's not working for me, have tried a few variations but no luck.
> Have you done this with Debian? It looks more like something for Solaris.
>
> Dave
>
> ----- Original Message -----
> From: "Johan Ehnberg" <johan@ehnberg.net>
> To: "David De Graff" <debian@platformglobal.com>;
> <debia-user@lists.debian.org>
> Sent: Thursday, August 08, 2002 1:18 AM
> Subject: Re: Multiple IPs on a single network interface
>
>
> > Just a little note:
> > Configuring this is easy:
> > look at your /etc/network/interfaces:
> >
> > iface eth0 inet static
> > address    192.168.0.1    (IP of interface)
> > netmask    255.255.255.0
> > [other relevant lines, if needed]
> >
> > Configuring your alias/virtual interface is done the same way:
> >
> > iface eth0:0 inet static
> > address    192.168.0.2    (IP of virtual interface)
> > netmask    255.255.255.0
> > [other relevant lines, if needed]
> >
> >
> > David De Graff wrote:
> >
> > > That's it! Thanks - simple, direct, and on target.
> > >
> > > Now if we can just make the relevant docs more like that...
> > >
> > > Dave
> > >
> > > ----- Original Message -----
> > > From: "Cameron Hutchison" <camh+dl@xdna.net>
> > > To: "Debian User List" <debian-user@lists.debian.org>
> > > Sent: Thursday, August 08, 2002 12:32 AM
> > > Subject: Re: Multiple IPs on a single network interface
> > >
> > >
> > > > Once upon a time David De Graff said...
> > > >
> > > > > I need to configure a woody server to run multiple IPs on a single
> > > ethernet
> > >
> > > > > interface. Have been digging and digging through the web and various
> > > docs,
> > >
> > > > > and don't see a clear answer.
> > > > >
> > > > > I'd appreciate any pointers to clear docs on this, or an explanation of
> > > how
> > >
> > > > > to configure it.
> > > > I believe all you need to do is configure the interface ethx:1.
> > > >
> > > > eg. if you want to add another IP address to eth0, run this:
> > > > # ifconfig eth0:1 192.168.0.2 netmask 255.255.255.0
> > > >
> > > > Substitute interface names and IP addresses accordingly.
> > > >
> > > > If you need another IP address, configure interface ethx:2, etc.
> > > >
> > > > This all works for me on unstable with kernel 2.4.18.
> > > >
> > > > --
> > > > Cameron Hutchison (camh+dl@xdna.net) | Onward To Mars
> > > >
> > > >
> > > > --
> > > > To UNSUBSCRIBE, email to debian-user-request@lists.debian.org
> > > > with a subject of "unsubscribe". Trouble? Contact
> > > listmaster@lists.debian.org