[Wylug-discuss] Semi-OT - Extending the LAN

[Anne Wilson]

On Monday 15 Aug 2005 12:54, Jim Jackson wrote:
> On Wed, 10 Aug 2005, Anne Wilson wrote:
> > Another fine mess I've got myself into :-)  OK - the position at the
> > moment is this:
> >
> > The lan uses ip range 192.168.0, whereas the new router defaults to
> > 192.168.1.  I changed the IP of one of the Mandrake boxes because I'm
> > more familiar with that than with the XP box, and accessed the setup
> > pages.  I made all the changes I thought necessary, then set its IP to
> > a 192.168.0 setting.  Somewhere among those settings I did something
> > stupid, because the wan light went crazy.  At that point I decided
> > that a factory reset was in order so that I could start again. 
> > Unfortunately I can no longer access the setup pages at all.  It
> > doesn't respond either to the factory default 192.168.1.1 or the
> > 192.168.0.2 that I gave it.
> >
> > I may have to sleep on this in the hope of enlightenment.
>
> A quick tip for people, when they need to connect to a box whose default
> address is on another network. Simply configure your main etherent port
> with a secondary IP address on the same network as the box.
> In effect you put your ethernet interface in both networks and can now
> speak to everything. If you enabled ip forwarding, you can make a one
> interface router :-)
>
> secondary addresses are specified by adding an ':' seperated field to
> the interface name. eth0 has secondary addresses eth0:1 , eth0:2 ....
> etc You can specify several addresses. If you do this dynamically with
> ifconfig (see below) then on a reboot all is back to normal. If you want
> these addresses to be permanent then you'd probably have to fiddle with
> the start up scripts.
>
> Eg.
>
> [root at cslin146 root]# ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:11:11:37:8B:38
>            inet addr:129.11.146.146  Bcast:129.11.147.255 
> Mask:255.255.252.0 inet6 addr: fe80::211:11ff:fe37:8b38/64 Scope:Link
>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>            RX packets:151489874 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:55415487 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:3341132838 (3186.3 Mb)  TX bytes:46789904 (44.6 Mb)
>            Interrupt:16
>
> [root at cslin146 root]# ifconfig eth0:1 192.168.10.1
>
> [root at cslin146 root]# ifconfig -a
> eth0      Link encap:Ethernet  HWaddr 00:11:11:37:8B:38
>            inet addr:129.11.146.146  Bcast:129.11.147.255 
> Mask:255.255.252.0 inet6 addr: fe80::211:11ff:fe37:8b38/64 Scope:Link
>            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>            RX packets:151490457 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:55415747 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:3341234121 (3186.4 Mb)  TX bytes:46832819 (44.6 Mb)
>            Interrupt:16
>
> eth0:1    Link encap:Ethernet  HWaddr 00:11:11:37:8B:38
>            inet addr:192.168.10.1  Bcast:192.168.10.255 
> Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:1000
>            RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>            Interrupt:16
>
I wish I had known about this earlier, but with the box gone back I can't 
use any of these tips at the moment.  They are all being noted for future 
use, though.  Thanks to all

Anne
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