Description:
  This command sets the community read-only and read-write strings.
Form:
  Command Handler: SYSD
  SNMPVAR | SNMPVAR | SNMPVAR [[NAME] VALUE]
  Argument list:
  NAME            DEFAULT VALUE      DESCRIPTION
  rocommunity     adtec              Read-only community string
  rwcommunity     none               Read-write community string
  trapcommunity   public             used with snmp trap messages
  trap2sink       localhost          the address of the trap monitor
Response:
  "OK\r\n" to acknowledge receipt of command, and
  [Reply Info]  if required by the command
  "ERROR- [Description]\r\n" if error, ending command
  "\r\n" concludes modify responses (empty line)
Examples:
   Show all:
   *.SYSD SNMPVAR 
    Response is: OK\r\n
                 SNMPVAR ROCOMMUNITY = adtec\r\n
                 SNMPVAR RWCOMMUNITY = none\r\n
                 SNMPVAR TRAPCOMMUNITY = public\r\n
					  SNMPVAR TRAPSINK = localhost\r\n
                 \r\n    
   Get RWCOMMUNITY:
   *.SYSD SNMPVAR RWCOMMUNITY
    Response is: OK\r\n
                 SNMPVAR RWCOMMUNITY = none\r\n
                 \r\n    
   
   Set RWCOMMUNITY                
   *.SYSD SNMP RWCOMMUNITY mysecret
    Response is: OK\r\n
                 \r\n    
Notes:
  SNMP Version 2 is default.