SNMP Scripts Overview

Junos OS SNMP scripts provide the flexibility to support custom MIBs that are not implemented in the Junos operating system (Junos OS). SNMP scripts are triggered automatically when the SNMP manager requests information from the SNMP agent for an unsupported object identifier (OID) that is mapped to an SNMP script. The script acts like an SNMP subagent, and the system sends the return value from the script to the network management system (NMS).

Note:

SNMP must be configured on the device before SNMP scripts can provide values for OIDs.

Table 1 lists SNMP script tasks and where to find details.

Table 1: SNMP Script Tasks
SNMP Script Task	Find Details Here
Get started with the SLAX script language	SLAX Overview Understanding Extension Functions in Junos OS Automation Scripts
Develop SNMP scripts	Required Boilerplate for SNMP Scripts Example: Process Unsupported OIDs with an SNMP Script
Configure SNMP scripts	Enable an SNMP Script snmp
Debug SNMP scripts	Trace SNMP Script Processing on Devices Running Junos OS
Manage SNMP scripts	Store Scripts in Flash Memory Understanding Limits on Executed Event Policies and Memory Allocation for Scripts
Add security for SNMP scripts	Configure Checksum Hashes for an SNMP Script

SNMP scripts are based on the Junos XML management protocol and the Junos XML API, which are discussed in Junos XML Management Protocol and Junos XML API Overview. You can write SNMP scripts in Python, Extensible Stylesheet Language Transformations (XSLT), or Stylesheet Language Alternative syntaX (SLAX). SNMP scripts written in SLAX and XSLT use XPath to locate the operational objects to inspect and use XSLT constructs to specify the actions to perform on those objects. The actions can change the output or execute additional commands based on the output.

SNMP Scripts Overview

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