Инструкции По Установке для 3com S7906E

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1-5 
To do… 
Use the command… 
Remarks 
Enable sending of 
ICMP timeout 
packets 
ip ttl-expires enable 
Required 
Disabled by default. 
Enable sending of 
ICMP destination 
unreachable packets 
ip unreachables enable 
Required 
Disabled by default. 
tracert [ -a source-ip | -f first-ttl | -m max-ttl | 
-p
 port | -q packet-number | -vpn-instance 
vpn-instance-name | -w timeout ] * host 
Display the routes 
from source to 
destination 
tracert ipv6 [ -f first-ttl | -m max-ttl | -p port | 
-q packet-number -w timeout ] * host 
Required 
Use either approach 
The tracert command is 
applicable in an IPv4 
network; the tracert ipv6 
command is applicable in an 
IPv6 network. 
Available in any view 
 
 
For the introduction to the tracert lsp command, refer to MPLS Basics Commands in the MPLS 
Volume
 
System Debugging 
Introduction to System Debugging 
The device provides various debugging functions. For the majority of protocols and features supported, 
the system provides corresponding debugging information to help users diagnose errors. 
The following two switches control the display of debugging information: 
Protocol debugging switch, which controls protocol-specific debugging information. 
Screen output switch, which controls whether to display the debugging information on a certain 
screen. 
As 
 illustrates, suppose the device can provide debugging for the three modules 1, 2, and 3. 
Only when both the protocol debugging switch and the screen output switch are turned on can 
debugging information be output on a terminal.