Goal : To have two subnets in each department one for windows OS and other for non-windows OS


1) There will be two subnets :

a) Windows OS Subnet :
Which contains all the windows machines where the
IP range : 10.xx.128.0 - 10.xx.255.0
gateway : 10.xx.250.1
subnet Mask : 255.255.128.0, where xx is the dept. id.


Ex : A windows machine is CSE dept will have

IP - 10.105.206.1
Gatway : 10.105.250.1
mask : 255.255.128.0



b)The other subnet will be non-windows which will include unix, Linux, HP, Solaris, Mac OS machines

IP range : 10.xx.0.0 - 10.xx.127.0
gateway : 10.xx.1.250
subnet Mask : 255.255.128.0, where xx is the dept. id.
*****Please note that this is the same "xx" which you used to use earlier.


Ex : A linux machine is CSE dept will have

IP - 10.105.106.1
Gatway : 10.105.1.250
mask : 255.255.128.0



2) Faculty machines will be allocated with the IP addresses in the range

linux : 10.xx.5.0 - 10.xx.5.255
Windows : 10.xx.5+128.0 - 10.xx.5+128.255



3) All the labs/computer rooms are allocated with the IP addresses in the range

Linux : 10.xx.11.0 - 10.xx.30.255
Windows : 10.xx.11+128.0 - 10.xx.30+128.255

4) In case of servers :

It has been observed that most of the servers are non windows based servers but in
case if there are any windows based servers you need to change the IP address of
the server according to the information above.

For example :

Valid IP address for non-windows based server : 10.102.2.1
Valid IP address for windows based server : 10.102.220.1

In any case gateway and subnet mask need to be changed according to the information above.

5) Please note that there is no change in DNS entry so DNS will remain
same , DNS : 10.200.1.11

6) Please note that when the IP's (machines/servers) which are listed in the DNS, are changed we also need

to change the entries in the DNS correspondingly. So we request you to provide us the consolidated information

of the changed IP's.

How to change the IP's in different operating systems :


WINDOWS :

a) Go to "Network places"icon on the desktop .
b) Right click
c) Go to"Properties"
d) Click on "local area connection" icon
e) Then Right click and
f) Go to "TCP/IP and Properties" option
g) Select "Use the following Ip address" option
h) And fill all the fields.


To check whether you have entered the correct values or not
a) Go to command prompt
b) Type ipconfig/all, which will display all the values.
c) finally reboot the machine for the changes to take place.

LINUX :

a) Login as a root
b) go to /usr/sbin/setup
c) Select the "Network configuration" option
d) type the respective IP,gateway and subnet mask
e)finally reboot the machine for the changes to take place.


Note :
a)In case even after rebooting if the linux machines are unable to connect then you will probably need to
change the IP address in the file /etc/sysconfig/network-scripts/ifcfg-eth0 or ifcfg-eth1,eth2 depending

upon the type of device. Please add the subnet mask and the IP address in the above files.

Please donot add the gateway in these files.

b) Gateway should be added only in /etc/sysconfig/network.
c)To check whether all the values are entered correctly or not,type /sbin/ifconfig for the
confirmation where you would see the IP address and subnet mask.


SOLARIS :
* On solaris, update /etc/hosts, /etc/defaultrouter, /etc/defaultdomain.
* To setup the subnet mask in solaris go the following file /etc/netmasks

MAC :

1) Go to "Macintosh HD" icon which will be there by default on the desktop
2) Click on "Application" option
3) Go to "System Preferences" and then click on "Network" option and enter the values.
4) Reboot the system for the changes to take place.
5) To ensure that you have entered the correct values --
a) Open a console and type /sbin/ifconfig or
b) Go to "Application" option and then click on "utilities" and then "Network Utilities"

Please note that you need to reboot the system after changing the IP's for the changes to take place.

Otherwise you would see the cache entries and won't be able to connect to the rest of the world.