Adding Additional Ip's to same interface

[jared71]

Hello,

Is there any way to add additional IP addresses to the same physical interface. I know you can add up to 255 using the ifconfig command, however, I was looking for a configuration change (such as a config file) that stuck around after a reboot.

Any help would be greatly appreciated.

Jared

 

[unixkid]

With Solaris 2.x it is possible to configure multiple IP addresses for a single physical interface. This allows a machine with a single ethernet card to appear as an entire network of different machines.

In order to configure the lance ethernet (le0 or hme0) device to support more than one ip address, do the following:

1. Create entries in /etc/hosts for each hostname your physical machine will appear as.

128.195.10.31 myhost
128.195.10.46 myhost2
128.195.10.78 myhost3

2. Create /etc/hostname.le0:n files that contain the hostname for the virtual host n. Note that hostname.le0:0 is the same as hostname.le0

/etc/hostname.le0 (Contains name myhost)
/etc/hostname.le0:1 (Contains name myhost2)
/etc/hostname.le0:2 (Contains name myhost3)

or

/etc/hostname.hme0 --> 10/100Mbit/sec high speed interface
/etc/hostname.hme0:1
/etc/hostname.hme0:2

The above changes will cause the virtual hosts to be configured at boot time. You can also directly enable/modify a logical hosts configuration by running ifconfig directly on one of the logical hosts by using the le0:n naming scheme.

% ifconfig le0:1 up
% ifconfig le0:1 129.153.76.72
% ifconfig le0:1 down

or

% ifconfig hme0:1 up
% ifconfig hme0:1 129.153.76.72
% ifconfig hme0:1 down