1740 System Management CommandsCommand ModeUser Exec mode and Privileged EXEC modeUser GuidelinesTraceroute operates by sending a sequence of Internet Control MessageProtocol (ICMP) echo request packets. The time-to-live (TTL) value, is usedin determining the intermediate routers through which the packet flowstoward the destination address. Routers decrement a packet’s TTL value anddiscard packets whose TTL equals 0. On discarding a packet, the routerreturns an ICMP time exceeded message to the source.ExamplesThe following example discovers the routes that packets will actually takewhen traveling to the destination specified in the command.(console) # traceroute 10.240.10.115 init-ttl 1 max-ttl 4 max-fail 0 interval1 count 3 port 33434 size 43Traceroute to 10.240.10.115, 4 hops max, 43 byte packets:1 10.240.4.1 708 msec 41 msec 11 msec2 10.240.10.115 0 msec 0 msec 0 msecHop Count = 1 Last TTL = 2 Test attempt = 6 Test Success = 6traceroute ipv6Use the traceroute command in Privileged EXEC mode to discover the IProutes that packets actually take when traveling to their destinations.Syntaxtraceroute ipv6ipv6address |hostname [ initTtlinitTtl ] [ maxTtlmaxTtl ] [maxFailmaxFail ] [ intervalinterval ] [ countcount ] [ portport ] [ sizesize][source {src-ip-address|vlanvlan-id|loopbackloop-id}]•ipv6address— Valid IPv6 address of the destination host.•hostname— Hostname of the destination host. (Range: 1–158 characters). Thecommand allows spaces in the host name when specified in double quotes. Forexample, console(config)#snmp-server host "host name"•initTtl— The initial time-to-live (TTL); the maximum number of router hopsbetween the local and remote system (Range: 0–255). the default is 1.
