The Traceroute [Destination Ip] Cisco command

Cisco's 'traceroute [destination_ip]' command is a powerful network diagnostic tool used to trace the route taken by packets from a source to a specified destination IP address. It accomplishes this by sending a series of probe packets with increasing Time-to-Live (TTL) values to the destination IP address.

The command is executed from a source device, typically a router or a switch, using the following syntax:

traceroute [destination_ip] [options]


The 'traceroute' command works by sending a series of User Datagram Protocol (UDP) probe packets to the destination IP address with a progressively increasing TTL value. Each probe packet has a TTL value that determines how many network hops it can traverse before being discarded. When a probe packet reaches a router with a TTL value of 0, the router discards the packet and sends an Internet Control Message Protocol (ICMP) Time Exceeded message back to the source device.

By analyzing the ICMP Time Exceeded messages, the 'traceroute' command can determine the path taken by the probe packets to reach the destination IP address. The command displays the IP addresses of the routers or network devices that forward the probe packets, as well as the round-trip time (RTT) for each hop.

The 'traceroute' command is a valuable tool for network administrators to troubleshoot connectivity issues, identify network congestion, and detect routing loops. It can be used on various Cisco equipment, including routers, switches, and firewalls, that run the Cisco IOS operating system.

traceroute [destination_ip] Usage Examples

The syntax for traceroute [destination_ip] command in Cisco is:

traceroute [destination_ip] [additional_parameters]

The following are some examples of the traceroute [destination_ip] command:

traceroute -m 30
traceroute -w 5
traceroute -s
traceroute -i GigabitEthernet0/1
traceroute -d
traceroute -p 443
traceroute -mtu 1000
traceroute -t 0x18