Generic trap handling

Certain devices generate traps of various generic types. How the probe handles each trap depends on its type.

The following table describes the handling of each generic trap type.

Table 1. Generic trap handling
Generic trap	Handling
Generic trap-type 0- Cold Start	`Summary` field set to `Cold Start` `AlertGroup` field set to `Generic` `Severity` field set to `4`
Generic trap-type 1- Warm Start	`Summary` field set to `Warm Start` `AlertGroup` field set to `Generic` `Severity` field set to `4`
Generic trap-type 2 - Link Down	`Summary` field set to `Link Down` `Alert Key` set to the `$1` varbind (`ifIndex`) `AlertGroup` field set to `Generic` `Severity` field set to `5` `Identifier` field set to `Node name` plus `Agent` plus `generic trap` plus `specific trap` plus `ifIndex.`
Generic trap-type 3 - Link Up	`Summary` field set to `Link Up` `Alert Key` set to the `$1` varbind (`ifIndex`) `AlertGroup` field set to `Generic` `Severity` field set to `2` `Identifier` field set to `Node name` plus `Agent` plus `generic trap` plus `specific trap` plus `ifIndex.`
Generic trap-type 4 - Authentication	By default, Authentication traps are not discarded.
Generic trap-type 5 - EGP Neighbor Loss	`Summary` field set to `EGP Neighbor Loss` `AlertGroup` field set to `Generic` `Severity` field set to `3`.