viveks wrote:
> hi,
>
> I want to configure multiple ip's for a single nic with each ip on a
> different subnet. I want this to persist across system reboots. How do i do
> this (by editing which file can i do this)?
Assuming you have disabled NWAM, it's quite simple. If your NIC is
named (say) "e1000g0", and you currently have /etc/hostname.e1000g0 to
configure its address, just create /etc/hostname.e1000g0:1 to configure
a logical interface (also known as an "alias" on other operating
systems), /etc/hostname.e1000g0:2 for another, and so on.
Note that it's not necessary for logical interfaces to be on the same
network. They can all be on separate subnets.
Note also that you can specify the subnet mask in the /etc/hostname.*
file. You can use something like:
echo 10.2.5.1/24 > /etc/hostname.e1000g0:1
Furthermore, those files actually just contain a set of ifconfig
options, so see the ifconfig(1M) man page for details.
The above sets up the system to establish the interfaces at boot time.
To set them up without rebooting, just use ifconfig, like so:
ifconfig e1000g0:1 plumb 10.2.5.1/24 broadcast + up
If you haven't disabled NWAM, then you won't be able to do this with the
current version of NWAM integrated in OpenSolaris.
> I have gone through a lot of docs and searched enough, but couldn't find a
> solution.
> I know how to configure multiple ip's for a nic on the same subnet.
>
> Also, can the /etc/netmasks file contain multiple entries?
Yes, but don't bother. /etc/netmasks is a horror show.
> If i want to assign a netmask for an ip address, which file should i edit?
>
> How can i assign mutiple gateway's?
Sure. You can set multiple hard-coded default routes by adding multiple
addresses to the /etc/defaultrouter file.
Or, if you need something other than just default ("0/0") routes, use
the route(1M) "-p" flag to establish permanent routes.
Better still, if your network is complicated, use a routing protocol.
That's what routing protocols are for, and using one means that you have
much finer-grained control over your routing situation.
> Can i assign a gateway for a particular nic instead of specifying the default
> router?
No, I don't think that makes sense. That's not quite how IP works.
Routes are used to find interfaces, not the other way around.
--
James Carlson 42.703N 71.076W <[email protected]>
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