There are some differences with the way the traceroute command is implemented in the various operating systems this document discusses. This message lets the source know that the packet traverses that particular router as a hop When a router in the middle of the path finds a packet with TTL = 1, it responds with an Internet Control Message Protocol (ICMP) "time exceeded" message to the source. 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-addresscommand 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. Conventionsįor more information on document conventions, refer to the Cisco Technical Tips Conventions. If your network is live, make sure 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 12.2(27) Readers of this document should have basic knowledge of one of these operating systems: This utility comes with your host operating system (for example, Linux or Microsoft (MS) Windows), as well as with Cisco IOS® Software. Delivered-To: The final recipient of the email in this header.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.X-Google-Smtp-Source: Shows the email transferring using a Gmail SMTP server.X-Received: Differs from "Received" in that it is considered non-standard that is to say, it might not be a permanent address, such as a mail transfer agent or Gmail SMTP server.
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