H3C Technologies H3C SecBlade LB Cards - Manual (Page 14)

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hoplimit-expires enable command on the devices. For more information about this command, see
Network Management Command Reference.
• Enable sending of ICMPv6 destination unreachable packets on the destination device. If the
destination device is an H3C device, execute the ipv6 unreachables enable command. For more
information about this command, see Network Management Command Reference.
Using a tracert command to identify failed or all nodes in a
path
Execute tracert commands in any view.
Task Command Remarks
Display the
routes from
source to
destination.
• For an IPv4 network:
tracert [ -a source-ip | -f first-ttl | -m max-ttl | -p port | -q
packet-number | -vpn-instance vpn-instance-name | -w timeout ]
* host
• For an IPv6 network:
tracert ipv6 [ -f first-ttl | -m max-ttl | -p port | -q packet-number |
-vpn-instance vpn-instance-name | -w timeout ] * host
Use either
approach.
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 switches control the display of debugging information:
• Protocol debugging switch—Controls whether to generate the protocol-specific debugging
information.
• Screen output switch—Controls whether to display the debugging information on a certain screen.
As shown in Figure 3 , 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
displayed on a terminal (including console or VTY). You can also send debugging information to other
destinations. For more information, see "Configuring the information center."