CLI Reference Guide

1742 System Management Commands
User Guidelines
Traceroute operates by sending a sequence of Internet Control Message
Protocol (ICMP) echo request packets. The time-to-live (TTL) value, is used
in determining the intermediate routers through which the packet flows
toward the destination address. Routers decrement a packet’s TTL value and
discard packets whose TTL equals 0. On discarding a packet, the router
returns an ICMP time exceeded message to the source.
Examples
The following example discovers the routes that packets will actually take
when traveling to the destination specified in the command.
(console) # traceroute ipv6 2001::2 init-ttl 1 max-ttl 4 max-fail 0 interval
1 count 3 port 33434 size 43
Traceroute to 2001::2, 4 hops max, 43 byte packets:
1 2001::2 708 msec 41 msec 11 msec
2 2001::2 12 msec 13 msec 12 msec
3 2001::2 14 msec 9 msec 11 msec
update bootcode
Use the update bootcode command in Privileged EXEC mode to update the
bootcode on one or more switches. For each switch, the bootcode is extracted
from the active image and programmed to flash.
Syntax
update bootcode [ unit ]
• unit —Unit number.
Default Configuration
This command has no default configuration.
Command Mode
Privileged EXEC mode
2CSNXXX_SWUM200.book Page 1742 Tuesday, December 10, 2013 1:22 PM