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"snmpwalk: Unknown user name" error on VSX when using SNMPv3
Symptoms
  • 'snmpwalk -v 3 -u UserName ...' command on VSX fails with:

    snmpwalk: Unknown user name
  • 'snmpwalk -v 3 -u UserName ...' command succeeds only when executed immediately after adding a new SNMPv3 USM user.
    After reboot, or restarting of SNMP Agent, the command fails.

Solution
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