422
C
HAPTER
30: S
YSTEM
M
ANAGEMENT
C
OMMANDS
User Guidelines
The
traceroute
command takesadvantage of the error messages
generated by the devices when a datagram exceeds its time-to-live (TTL)
value.
The
traceroute
command starts by sending probe datagrams with a TTL
value of one. This causes the first device to discard the probe datagram
and send back an error message. The
traceroute
command sends several
probes at each TTL level and displays the round-trip time for each.
The
traceroute
command sends out one probe at a time. Each outgoing
packet may result in one or two error messages. A "time exceeded" error
message indicates that an intermediate device has seen and discarded the
probe. A "destination unreachable" error message indicates that the
destination node has received the probe and discarded it because it could
not deliver the packet. If the timer goes off before a response comes in,
the
traceroute
command prints an asterisk (*).
The
traceroute
command terminates when the destination responds,
when the maximum TTL is exceeded or when the user interrupts the trace
by pressing
Esc
.
Содержание 3CRUS2475 24
Страница 18: ......
Страница 40: ...40 CHAPTER 2 AAA COMMANDS ...
Страница 54: ...54 CHAPTER 3 ACL COMMANDS ...
Страница 76: ...76 CHAPTER 4 ADDRESS TABLE COMMANDS ...
Страница 165: ...show sntp status 165 g13 0 0 0 0 00 00 00 0 Feb 19 2005 vlan 1 16 1 1 2 00 15 15 16 0 LLBG Feb 19 2006 ...
Страница 166: ...166 CHAPTER 10 CLOCK COMMANDS ...
Страница 200: ...200 CHAPTER 13 LACP COMMANDS ...
Страница 208: ...208 CHAPTER 14 POWER OVER ETHERNET COMMANDS ...
Страница 262: ...262 CHAPTER 15 SPANNING TREE COMMANDS ...
Страница 278: ...278 CHAPTER 17 RADIUS COMMAND ...
Страница 281: ...show ports monitor 281 g1 8 RX TX Active g2 8 RX TX Active g18 8 RX Active ...
Страница 282: ...282 CHAPTER 18 PORT MONITOR COMMANDS ...
Страница 306: ...306 CHAPTER 19 SNMP COMMANDS ...
Страница 316: ...316 CHAPTER 20 IP ADDRESS COMMANDS ...
Страница 330: ...330 CHAPTER 22 WIRELESS ROGUE AP COMMANDS ...
Страница 350: ...350 CHAPTER 23 WIRELESS ESS COMMANDS ...
Страница 382: ...382 CHAPTER 25 SSH COMMANDS ...
Страница 400: ...400 CHAPTER 27 TACACS COMMANDS Global values TimeOut 3 ...
Страница 444: ...444 CHAPTER 31 USER INTERFACE COMMANDS ...
Страница 454: ...454 CHAPTER 32 GVRP COMMANDS ...
Страница 492: ...492 CHAPTER 34 802 1X COMMANDS ...
Страница 521: ...Troubleshooting Solutions 521 ...
Страница 522: ...522 CHAPTER 37 TROUBLESHOOTING ...