Nortel CallPilot User Manual page 40

40 Chapter 4 Using the operating system online diagnostic tools
4
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:
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Tracert syntax
tracert [-d] [-h maximum_hops] [-j host_list]
Tracert parameters
The tracert command uses the following parameters:
Parameter
-d
-h maximum_hops
-j host-list
-w timeout
target_name
To run the tracert command from the operating system
Copyright © 2007, Nortel Networks
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Type Exit to exit the Command Prompt window.
Tracert sends Internet Control Message Protocol (ICMP) echo 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.
When the TTL on a packet reaches 0, the router sends back an 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 on 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.
[-w timeout] [target_name]
Nortel CallPilot
201i Server Maintenance and Diagnostics
NN44200-705 01.01 Standard
5.0 23 February 2007
—End—
Description
Specifies not to resolve addresses to hostnames.
Specifies the maximum number of hops to search for
the target.
Specifies a loose source route along the host list.
Waits the number of milliseconds specified by the
timeout for each reply.
The name of the target host.
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