Nortel Networks 1005r User Manual
June 2007
Using Windows online diagnostic tools
1005r Server Maintenance and Diagnostics
51
To run the ping command from Windows
1
Click Start > Programs > Accessories > Command Prompt.
Result: The Command Prompt dialog box appears.
2
Type ping <destination IP address> (for example, ping
200.286.32.0) or ping <computer name>.
200.286.32.0) or ping <computer name>.
3
Press Enter.
Result: The system displays the ping results.
4
Type Exit to exit the Command Prompt dialog box and return to
Windows.
Windows.
The tracert command
This utility determines the route taken to a destination.
How tracert works
The tracert utility follows several steps to complete its task:
The tracert utility follows several steps to complete its task:
Tracert sends Internet Control Message Protocol (ICMP) echo
packets with varying Time-To-Live (TTL) values to the destination.
packets with varying Time-To-Live (TTL) values to the destination.
Each router along the path must decrement the TTL on a packet by
at least 1 before forwarding it, so the TTL is effectively a hop count.
at least 1 before forwarding it, so the TTL is effectively a hop count.
When the TTL on a packet reaches 0, the router sends back an
ICMP Time Exceeded message to the source system.
ICMP Time Exceeded message to the source system.
Tracert determines the route by sending the first echo packet with a
TTL of 1, and incrementing the TTL by 1 each subsequent
transmission until the target responds or the maximum TTL is
reached.
TTL of 1, and incrementing the TTL by 1 each subsequent
transmission until the target responds or the maximum TTL is
reached.
Tracert then examines the ICMP Time Exceeded messages sent
back by intermediate routers.
back by intermediate routers.