ARP cache in windows 7/Vista/XP/2000/Server 2003/2008

The Address Resolution Protocol (ARP) is very crucial for TCP/IP network communication. If you begin to notice network connectivity problems such as particular web pages not loading or not being able to ping certain IP addresses then clearing your ARP cache is a good place to start.The TCP/IP ARP Command component provides the functionality to add, delete, or display the IP address for Media Access Control (MAC) address translation.

To flush/Delete the ARP cache in windows 7/Vista/XP/2000/Server 2003/2008 follow this procedure
 
Click on Start—>Run—> type the following command click ok
 
netsh interface ip delete arpcache
 
Dynamic ARP cache entries update persist for 2-20 minutes depending on the system.
 
Windows 2003 Server = 10 minutes
 
Windows 2000 professional/Server = 10 minutes
 
Windows XP = 2 minutes
 
Solaris = 5 minutes
 
Delete IP address using arp command
 
arp -d <ip address>
 
Example
 
arp -d 10.1.1.2
 
Display arp table
 
arp -a
 
Add static entry to ARP table
 
arp -s <ip address> <mac address>
 
Example
 
arp -s 157.55.85.212 00-aa-00-62-c6-09