Typically, each router in the path towards the destination decrements the TTL field by one unit while it forwards these packets. If you execute the traceroute ip-address command on a source device (such as a host, or a router acting as a host), it sends IP packets toward the destination with Time To Live (TTL) values that increment up to the maximum specified hop count. This utility comes with your host operating system (for example, Linux or Microsoft (MS) Windows), as well as with Cisco IOS Software. The traceroute command allows you to determine the path a packet takes in order to get to a destination from a given source by returning the sequence of hops the packet has traversed. Conventionsįor more information on document conventions, refer to the Cisco Technical Tips Conventions. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. The information in this document applies to these software and hardware versions:Ĭisco Router that runs Cisco IOS Software Release 12 Readers of this document must have basic knowledge of one of these operating systems: This document describes how the traceroute command operates on different systems.
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