Re: Virtual Networking Interface Problem
On Monday 06 August 2007, Anson Gardner wrote:
> On Monday 06 August 2007 12:12, Hal Vaughan wrote:
> > I've been working on a project with some Linksys routers. New
> > routers are set to use the IP address 192.168.1.1 and my network
> > uses the 172.16.*.* address space. I've had this in my
> > workstation's /etc/network/interfaces file:
> >
> > auto eth0
> > iface eth0 inet static
> > address 172.16.7.11
> > netmask 255.255.255.0
> > gateway 172.16.7.1
> >
> > To access the Linksys routers when I first get them, I added this:
> >
> > auto eth0:0
> > iface eth0:0 inet static
> > address 192.168.1.128
> > netmask 255.255.255.0
> > gateway 172.16.7.1
> >
> > Then I restarted my network and I have eth0:0 with the address
> > 192.168.1.128. Using route gives this (edited for space):
> >
> > Kernel IP routing table
> > Destination Gateway Genmask Flags Metric Ref
> > Use Iface
> > 172.16.7.0 * 255.255.255.0 U 0 0 0
> > eth0 192.168.1.0 * 255.255.255.0 U 0 0
> > 0 eth0 link-local * 255.255.0.0 U 1000 0
> > 0 eth0 default fw.loc.lan 0.0.0.0 UG 0 0
> > 0 eth0 default fw.loc.lan 0.0.0.0 UG 0
> > 0 0 eth0
> >
> > (fw.loc.lan is the firewall between my LAN and the Internet.)
> >
> > I don't see any reference to eht0:0 at all. I don't know if that
> > matters.
> >
> > After restarting my network, I can't reach anything on the
> > Internet.
> >
> > Does it matter that route doesn't seem to see a difference between
> > eth0 and eth0:0?
> >
> > What do I need to do to be able to do this and not lose access to
> > domains on the other side of my gateway? Why does it change
> > routing so my computer doesn't work through the regular gateway
> > I've set?
> >
> > Thanks!
> >
> > Hal
>
> You don't need to specify the gateway for eth0:0.
Okay, took it out and it works just fine without it.
I had this working before, but couldn't remember the settings. I knew
it was something simple. I had other suggestions in private email from
well meaning people, but they were a lot of work. I wasn't about to go
through and change my entire network to a different range just for the
5 minutes it takes to log in to the router so I can change its address.
Even though I had searched and not found the answer, I was sure it was
only a minute or two of work if I knew what to do.
> I also needed to configure devices that had distinct ip address
> values by default. I had a similar setup until recently when I
> switched to using ip syntax instead of the 'old way.' Here's a sample
> of my interfaces file:
>
> address 123.456.789.2
> netmask 255.255.255.252
> gateway 123.456.789.1
> up ip addr add 10.1.250.15/24 brd 10.1.250.255 dev eth0 label eth0:0
> up ip addr add 10.10.10.15/24 brd 10.10.10.255 dev eth0 label eth0:1
>
> aptitude install iproute
> man ip
> See if something like that will work for you.
I will be looking into that, but it'll be later in the week before I
have time to try it.
Thanks!
Hal
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