3com 3CRUS2475 Manuale Utente

C

HAPTER

 30: S

YSTEM

 M

ANAGEMENT

 C

OMMANDS

The following table describes characters that may appear in the 
traceroute command output.

The telnet User EXEC mode command enables logging on to a host that 
supports Telnet.

telnet {ip-address | hostname} [port] [keyword1......] 

■

ip-address — IP address of the destination host.

■

hostname — Host name of the destination host. (Range: 1-158 
characters)

■

port — A decimal TCP port number, or one of the keywords listed in 
the Ports table in the User Guidelines.

■

keyword — One or more keywords listed in the Keywords table in the 
User Guidelines.

The default port is the Telnet port (decimal23) on the host.

User EXEC mode

*

The probe timed out.

?

Unknown packet type.

A

Administratively unreachable. Usually, this output 
indicates that an access list is blocking traffic.

F

Fragmentation is required and DF is set.

H Host 

unreachable. 

N

Network unreachable. 

P

Protocol unreachable. 

Q

Source quench.

R

Fragment reassembly time exceeded.

S

Source route failed.

U

Port unreachable.