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If you are unable to
contact to a remote server, there are two common tools that you can use. Use
the
ping
command to verify that a host computer can connect to the TCP/IP network and
network resources. Use the
tracert
command to examine the route taken to a destination.
To
Test Connections by Using Ping.exe
When troubleshooting, you can use ping to verify IP-level
connectivity. You should perform the following steps when using ping:
- Ping the loopback address to verify that TCP/IP is
configured correctly on the local computer - ping 127.0.0.1
- Ping the IP address of the local computer to verify that it was added to
the network correctly - ping IP_address_of_local_host
- Ping the IP address of the default gateway to verify that the default
gateway is functioning and that you can communicate with a local host on the
local network - ping IP_address_of_default_gateway
- Ping the IP address of a remote host to verify that you can communicate
through a router - ping IP_address_of_remote_host
If you can ping a remote computer's
IP but not the ComputerName (Time out), this is
likely caused by a
name resolution failure, rather than network connectivity.
You need to check the network settings such as DHCP, DNS, WINS and NetBIOS
over TCP/IP.
If you cannot ping
both IP and ComputerName, 1)
Ping the loopback address
(by using the ping 127.0.0.1
command) to verify that TCP/IP is installed and working correctly on the local
computer.
2) Ping the IP address of
the local computer to verify that it was added to the network correctly.
3) Ping the IP address of
the default gateway to verify that the gateway is functional and it is
possible to connect to a local host on the local network. You can obtain the
IP address of the local default gateway by using the
ipconfig
/renew command.
4) Ping the IP address of
another remote host to verify that you can communicate through a router.
To
Test Connections by Using Tracert.exe
Tracert.exe is a route-tracing utility that you can use to
determine the network path to a destination. To determine the path that a
packet takes on the network and where that path may be ending.
For example, your LAN works fine but no one can access the Internet. You may
want to use tracert to determine the network path to a Internet
destination like yahoo.com before you call your ISP. You can use tracert to
examine the results to determine the length of time that the packet took to
reach each network segment and the point at which the connection may stop
working.
PathPing
display all routers along the way
Using PathPing can displays information for the destination computer and
all routers along the way. For example, to display the information of all
router paths to yahoo.com, use command pathping yahoo.com.
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