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

Thu, 15 Dec 2011 10:30:00 GMT

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 Example arp -d 10.1.1.2 Display arp table arp -a Add static entry to ARP table arp -s Example arp -s 157.55.85.212 00-aa-00-62-c6-09

Manually Set a Static IP Address

Thu, 15 Dec 2011 10:23:00 GMT

In Windows Server 2008 Core installation, the only way to setup IP Address eithe Static or DHCP is from the command line. The following procedure helps setting the IP Address from the command Line using “netsh”. This procedure works in Windows Server 2008 (No core installation as well), Windows Server 2003, Windows XP, Windows Vista. To setup Static IP Address: From the command prompt: 1. Type C:\Users\Administrator> netsh interface ipv4 show interfaces Idx Met MTU State Name — — —– ———– ——————- 1 50 4294967295 connected Loopback Pseudo-Interface 1 10 20 1500 connected Local Area Connection This should show the Network Connections. We are looking for the name here. On mine, I have one LAN interface and is named as “Local Area Connection” 2. To set a static IP Address type the following command C:\Users\Administrator>netsh interface ipv4 set address name=”Local Area Connect ion” source=static address=192.168.0.5 mask=255.255.255.0 gateway=192.168.0.1 The syntax is netsh interface ipv4 set address name=”” source=static address= mask= gateway= Where: ID is the name of the LAN Connection StaticIP is the static IP address that you are setting SubnetMask is the subnet mask for the IP address DefaultGateway is the default gateway 3. Now set the DNS Servers one at a time with the followind command. For each DNS server, increase the index number. C:\Users\Administrator>netsh interface ipv4 add dnsserver name=”Local Area Conne ction” address=192.168.0.1 index=1 C:\Users\Administrator>netsh interface ipv4 add dnsserver name=”Local Area Conne ction” address=192.168.0.10 index=2 The syntax is netsh interface ipv4 add dnsserver name=”” address=index=1 Where: ID is the name of the Network Connection DNSIP is the IP address of your DNS server This should do. To confirm, do an “ipconfig” Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controller Physical Address. . . . . . . . . : 00-1D-09-D4-2C-8F DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.0.5(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 192.168.0.10 127.0.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled Set IP through DHCP Server To set the DHCP Server, from the command line C:\Users\Administrator> netsh interface ipv4 set address name=”Local Area Connection” source=dhcp Syntax is netsh interface ipv4 set address name=”ID” source=dhcp where ID is the name of the Network Connection

Global Internet Business Solutions ~ GIBS

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

Manually Set a Static IP Address