User's Manual

76-1
Chapter 76 Monitor and Debug
When the users configures the switch, they will need to verify whether the configurations are correct and the
switch is operating as expected, and in network failure, the users will also need to diagnostic the problem.
Switch provides various debug commands including ping, telnet, show and debug, etc. to help the users to
check system configuration, operating status and locate problem causes.
76.1 Ping
Ping command is mainly used for sending ICMP query packet from the switches to remote devices, also for
check the accessibility between the switch and the remote device. Refer to the Ping command chapter in the
Command Manual for explanations of various parameters and options of the Ping command.
76.2 Ping6
Ping6 command is mainly used by the switch to send ICMPv6 query packet to the remote equipment,
verifying the accessibility between the switch and the remote equipment. Options and explanations of the
parameters of the Ping6 command please refer to Ping6 command chapter in the command manual.
76.3 Traceroute
Traceroute command is for testing the gateways through which the data packets travel from the source device
to the destination device, so to check the network accessibility and locate the network failure.
Execution procedure of the Traceroute command consists of: first a data packet with TTL at 1 is sent to the
destination address, if the first hop returns an ICMP error message to inform this packet can not be sent (due
to TTL timeout), a data packet with TTL at 2 will be sent. Also the send hop may be a TTL timeout return, but
the procedure will carries on till the data packet is sent to its destination. These procedures is for recording
every source address which returned ICMP TTL timeout message, so to describe a path the IP data packets
traveled to reach the destination.
Traceroute Options and explanations of the parameters of the Traceroute command please refer to traceroute
command chapter in the command manual.
76.4 Traceroute6
The Traceroute6 function is used on testing the gateways passed through by the data packets from the
source equipment to the destination equipment, to verify the accessibility and locate the network failure. The
principle of the Traceroute6 under IPv6 is the same as that under IPv4, which adopts the hop limit field of the
ICMPv6 and IPv6 header. First, Traceroute6 sends an IPv6 datagram (including source address, destination