snmp - 清除 SNMP 陷阱

Question

我正在编写一个 SNMPv2 代理并需要发送陷阱。

陷阱发送正常，但需要在条件恢复正常时清除陷阱。目前 SNMP 接收器保持报警状态，直到手动清除。

我是否发送了另一个 OID？我是 SNMP 新手。

Answer 1

清除逻辑在 Trap Receiver 端实现。此处的代理任务是为此目的发送另一个 SNMP 陷阱。最常用的场景是RFC1157和RFC1215中定义的linkDown / linkUp陷阱：

 linkDown TRAP-TYPE
              ENTERPRISE  snmp
              VARIABLES   { ifIndex }
              DESCRIPTION
                          "A linkDown trap signifies that the sending
                          protocol entity recognizes a failure in one of
                          the communication links represented in the
                          agent's configuration."
              ::= 2

 linkUp TRAP-TYPE
              ENTERPRISE  snmp
              VARIABLES   { ifIndex }
              DESCRIPTION
                          "A linkUp trap signifies that the sending
                          protocol entity recognizes that one of the
                          communication links represented in the agent's
                          configuration has come up."
              ::= 3