H3C Technologies H3C SecPath F1000-E - Manual (Page 20)

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• Enable sending of ICMP destination unreachable packets on the destination device. If the
destination device is an H3C device, execute the ip unreachables enable command.
For more information about the ip ttl-expires enable and ip unreachables enable commands, see
System Management and Maintenance Command Reference.
Using a tracert command to identify failed or all nodes in a path
Step Command Remarks
1. Enter system view. system-view N/A
2. Display the routes from
source to destination.
• For IPv4 networks:
tracert [ -a source-ip | -f first-ttl | -m max-ttl | -p
port | -q packet-number | -vpn-instance
vpn-instance-name | -w timeout ] * host
• For IPv6 networks:
tracert ipv6 [ -f first-ttl | -m max-ttl | -p port | -q
packet-number | -vpn-instance
vpn-instance-name | -w timeout ] * host
Required.
Available in any view.
System debugging
The device supports debugging for the majority of protocols and features and provides debugging
information to help users diagnose errors.
Debugging information control switches
The following two switches control the debugging information output:
• Protocol debugging switch—Controls protocol-specific debugging information.
• Screen output switch—Controls whether to display the debugging information on a certain screen.
As shown in Figure 7 , assume that the device can provide debugging for the three modules 1, 2, and 3.
The debugging information can be output on a terminal only when both the protocol debugging switch
and the screen output switch are turned on.
Output of debugging information depends on the configurations of the information center and the
debugging commands of each protocol and functional module. Debugging information is typically
output on a terminal (including console or VTY) for display. You can also send debugging information to
other destinations. For more information, see "Configuring the information center."