SNR S2940-8G-v2, Руководство по настройке

Страница: 412 / 420

SNR S2940-8G-v2 Switch Configuration Guide
Monitor and Debug
Chapter 66
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.
66.1 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.
66.2 Ping6
Ping6 command is mainly used by the switch to send ICMPv6 query packet to the remote equip-
ment, verifying the accessibility between the switch and the remote equipment. Options and ex-
planations of the parameters of the Ping6 command please refer to Ping6 command chapter in
the command manual.
66.3 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 net-
work 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.
412