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Troubleshoot SNMP

Use the following commands to troubleshoot potential SNMP issues:

cumulus@switch:~$ net show snmp-server status
Simple Network Management Protocol (SNMP) Daemon.
---------------------------------  ------------------------------------------------------------------------------------
Current Status                     failed (failed)
Reload Status                      enabled
Listening IP Addresses             localhost
Main snmpd PID                     0
Version 1 and 2c Community String  Configured
Version 3 Usernames                Not Configured
Last Logs (with Errors)            -- Logs begin at Thu 2017-08-03 16:23:05 UTC, end at Fri 2017-08-04 18:17:24 UTC. --
                                   Aug 04 18:17:19 cel-redxp-01 snmpd[8389]: Error opening specified endpoint ""
                                   Aug 04 18:17:19 cel-redxp-01 snmpd[8389]: Server Exiting with code 1
---------------------------------  ------------------------------------------------------------------------------------
cumulus@switch:~$ net show configuration snmp-server
  readonly-community public access default
  readonly-community allpass access any
  readonly-community temp2 access
  readonly-community temp2 access
  trap-destination community-password public version 2c
  trap-link-up check-frequency 10