|
This diagnostic utility determines the route taken to a destination by
sending Internet Control Message Protocol (ICMP) echo packets with varying
Time-To-Live (TTL) values to the destination. Each router along the path is
required to 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 is supposed to send 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. The route is
determined by examining the ICMP Time Exceeded messages sent back by
intermediate routers. However, some routers silently drop packets with expired
TTL values and are invisible to tracert. tracert [-d] [-h maximum_hops] [-j computer-list]
[-w timeout] target_name Parameters -d Specifies not to resolve addresses to computer names. -h maximum_hops Specifies maximum number of hops to search for target. -j computer-list Specifies loose source route along computer-list. -w timeout Waits the number of milliseconds specified by timeout for each reply. target_name Name of the target computer. |