PLANET XGS3-24040 - Manual (Page 62)

Chapter 4 Basic Switch Configuration
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Scenario 5: The IPv6 address of the NMS is 2004:1:2:3::2; the IPv6 address of the switch (Agent) is
2004:1:2:3::1. The NMS network administrative software uses SNMP protocol to obtain data from the switch.
The configuration on the switch is listed below:
Switch(config)#snmp-server enable
Switch(config)#snmp-server community rw private
Switch(config)#snmp-server community ro public
Switch(config)#snmp-server securityip 2004:1:2:3::2
The NMS can use private as the community string to access the switch with read-write permission, or use
public as the community string to access the switch with read-only permission.
Scenario 6: NMS will receive Trap messages from the switch (Note: NMS may have community string
verification for the Trap messages. In this scenario, the NMS uses a Trap verification community string of
dcstrap).
The configuration on the switch is listed below:
Switch(config)#snmp-server host 2004:1:2:3::2 v1 dcstrap
Switch(config)#snmp-server enable traps
4.4.6 SNMP Troubleshooting
When users configure the SNMP, the SNMP server may fail to run properly due to physical connection failure
and wrong configuration, etc. Users can troubleshoot the problems by following the guide below:
 Good condition of the physical connection.
 Interface and datalink layer protocol is Up (use the “show interface” command), and the connection
between the switch and host can be verified by ping (use “ping” command).
 The switch enabled SNMP Agent server function (use “snmp-server” command)
 Secure IP for NMS (use “snmp-server securityip” command) and community string (use “snmp-server
community” command) are correctly configured, as any of them fails, SNMP will not be able to
communicate with NMS properly.
 If Trap function is required, remember to enable Trap (use “snmp-server enable traps” command). And
remember to properly configure the target host IP address and community string for Trap (use
“snmp-server host” command) to ensure Trap message can be sent to the specified host.
 If RMON function is required, RMON must be enabled first (use “rmon enable” command).
 Use “show snmp” command to verify sent and received SNMP messages; Use “show snmp status”
command to verify SNMP configuration information; Use “debug snmp packet” to enable SNMP
debugging function and verify debug information.
If users still can’t solve the SNMP problems, Please contact our technical and service center.