Template:FAQ:Applications 13

Assuming that the access control settings should allow this, another possibility for the 'sysLocation' and 'sysContact' objects is that you've got a configuration option in the 'snmpd.conf' file which already sets the corresponding value there.

Earlier versions of the Net-SNMP agent would allow you to write to these objects, but the new value would be forgotten the next time the agent was re-started. More recent versions of the agent reject such write requests if there's a value configured via the 'snmpd.conf' file. If there isn't such a config setting, then the write request will succeed (assuming suitable access control settings), and the new value will be retained the next time the agent restarts.