I am running Linux AS4 Update version. I have one lan card and the primary IP-Address is 192.168.0.215 & subnet is 255.255.255.0

Now I want to assign an alternative IP-Address on the same card & the IP I want to assign is 192.168.15.215.

I run the following command from root user
ifconfig eth0:1 192.168.15.215 netmask 255.255.255.0 up

Now when I ping this IP 192.168.15.215 From Windows machine then its reply me & properly reply comming from this Ip. But when I want to access this Ip by \\192.168.15.215 from run prompt then it gave me error.
The specified network name is no longer available..

I already restart the machine & network service but the problem remains same.

Please guide.

You should make sure to start samba AFTER the address is added, so it binds to it.

I restart the samba service but nothing happens with problem.

Then check the samba config. Maybe it binds explicitly to eth0's address (and not to 0.0.0.0). Another thing to check are packet filtering rules (iptables).

i think, you shold add a virtula interface

First you will have to define a virtual interface to have that interface available on every reboot...

# cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0

and edit the new file ifcfg-eth0:0 with the desired configuration. Then make sure that samba bind to all interfaces...

# vi /etc/samba/smb.conf

and make sure you have