Types of traps
Traps are administrative messages sent from network devices such as routers that indicate that the device or its connections have started or stopped.
The Trap finder discovers devices by listening for SNMP traps and extracting IP addresses from those traps. The different types of traps are described in Table 1.
| Number | Name | Description |
|---|---|---|
| 0 | coldStart trap | A coldStart trap signifies that the sending protocol entity is reinitializing itself such that the agent's configuration or the protocol entity implementation may be altered. |
| 1 | warmStart trap | A warmStart trap signifies that the sending protocol entity is reinitializing itself such that neither the agent configuration nor the protocol entity implementation is altered. |
| 2 | linkDown trap | A linkDown trap is generated by the failure of a recognized communication link. |
| 3 | linkUp trap | A linkUp trap is generated when a communication link that was formerly down comes alive. |
| 4 | authenticationFailure trap | An authenticationFailure trap is generated by a protocol message that has not been authenticated by the recipient, for example, an incorrect password. |
| 5 | egpNeighborloss trap | An egpNeighborLoss trap signifies that an Exterior Gateway Protocol (EGP) neighbor for which the sending protocol entity was an EGP peer has been marked down and the peer relationship is no longer valid. |
| 6 | enterprise-specific trap | An enterprise-specific trap signifies that the sending protocol entity recognizes that an enterprise-specific event has occurred. |