5• Enable sending of ICMPv6 destination unreachable packets on the destination device. If thedestination device is an H3C device, execute the ipv6 unreachables enable command. For moreinformation about this command, see Layer 3—IP Services Command Reference.Tracert configurationFollow the step below to configure tracert:To do… Use the command… RemarksIPv4 network:tracert [ -a source-ip | -f first-ttl | -mmax-ttl | -p port | -q packet-number| -w timeout ] * hostDisplay the routes from source todestination IPv6 network:tracert ipv6 [ -f first-ttl | -m max-ttl |-p port | -q packet-number | -wtimeout ] * hostRequiredUse one of the commandsAvailable in any viewSystem debuggingIntroduction to system debuggingThe device provides various debugging functions. For the majority of protocols and features supported,the system provides debugging information to help users diagnose errors.The following two switches control the display of debugging information:• Protocol debugging switch: Controls protocol-specific debugging information.• Screen output switch: Controls whether to display the debugging information on a certain screen.Displaying debugging informationAs 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 switchand the screen output switch are turned on.
