1742 System Management CommandsUser 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 ipv6 2001::2 init-ttl 1 max-ttl 4 max-fail 0 interval1 count 3 port 33434 size 43Traceroute to 2001::2, 4 hops max, 43 byte packets:1 2001::2 708 msec 41 msec 11 msec2 2001::2 12 msec 13 msec 12 msec3 2001::2 14 msec 9 msec 11 msecupdate bootcodeUse the update bootcode command in Privileged EXEC mode to update thebootcode on one or more switches. For each switch, the bootcode is extractedfrom the active image and programmed to flash.Syntaxupdate bootcode [unit ]•unit —Unit number.Default ConfigurationThis command has no default configuration.Command ModePrivileged EXEC mode
