How can i get a different IP address for wireless connection [closed]

Question

I always get same IP address for my wireless adapter.

so far i have tried

• ipconfig /dnsflush followed by ipconfig /renew
• net stop dnscache

but it still keeps getting me the same ip address.

does our router at workplace store mac address of machine & then assign same ip address again.

is there a way i can get completely different ip address for my win 7 32 bit laptop

Answer 1

It depends how the sysadmin has configured the DHCP server. From Wikipedia

dynamic allocation: A network administrator assigns a range of IP addresses to DHCP, and each client computer on the LAN is configured to request an IP address from the DHCP server during network initialization. The request-and-grant process uses a lease concept with a controllable time period, allowing the DHCP server to reclaim (and then reallocate) IP addresses that are not renewed.

automatic allocation: The DHCP server permanently assigns a free IP address to a requesting client from the range defined by the administrator. This is like dynamic allocation, but the DHCP server keeps a table of past IP address assignments, so that it can preferentially assign to a client the same IP address that the client previously had.

static allocation: The DHCP server allocates an IP address based on a table with MAC address/IP address pairs, which are manually filled in (perhaps by a network administrator). Only clients with a MAC address listed in this table will be allocated an IP address.

For details you may refer the RFC 2132

Answer 2

I believe you need to set static ip address in place of DHCP configured.

RHEL / Red hat / Fedora / CentOS Linux Static IP Configuration

Edit /etc/sysconfig/network-scripts/ifcfg-eth0

# Intel Corporation 82573E Gigabit Ethernet Controller (Copper)
DEVICE=eth0
BOOTPROTO=static
DHCPCLASS=
HWADDR=00:30:48:56:A6:2E
IPADDR=192.168.1.10
NETMASK=255.255.255.0
ONBOOT=yes

For wlan0 you just have to find the appropriate file name. I believe its wlan0.

Alternate solution

You can also tell DHCP to not assign the particular IP address to the machine.