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S2989G-24TX Operation Manual

Chapter 8 Debugging and Diagnosis Configuration

8-1

Chapter 8 Debugging and Diagnosis

Configuration

8.1

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.

8.1.1

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.

8.1.2

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.

8.1.3

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