Additional Network Troublshooting Methods

To verify or check TCP/IP routing table, you can use route print command. To add a route until next reboot, use route add command. To add a route permanently, use route add -p command.

To check local computer’s IP related settings, type ipconfig /all. This will show all related IP information including IP address for each interface, Mac(LAN card) address, default Gateway, Subnet Mask, DHCP server IP address, and DNS server names.

To release an DHCP assigned IP address, do ipconfig /release. To renew an DHCP assigned IP address do ipconfig /renew. For many Wireless Bridges/Routers, they will need you to enter Mac address into the bridge/router to enforce the security. ipconfig /all is the command to find out Mac address.

Just as DNS maps from DNS name to IP address, ARP, or Address Resolution Protocol, maps from IP address to Mac address. To check the current ARP table of this host, use arp -a, to add an ARP entry, do arp -s. we will need to use ARP to make sure the IP we are pinging is the host we intend to ping.