SBGW creates EventModels using IP Address instead of Hostname due to snmpTrapAddress varbind

Products

• Network Observability

Issue/Introduction

When using the Southbound Gateway (SBGW) in DX NetOps Spectrum, EventModels are created using the network (IP) address for the model name, even if the following conditions are met:

• The map_traps_to_ip_header attribute is set to true on the EventAdmin model.
• Event Variable 1 contains a valid hostname string.

Environment

• DX NetOps Spectrum (All Versions)
• Southbound Gateway (SBGW)

Cause

This is Functionality as Designed (FAD). When an incoming SNMP trap contains the snmpTrapAddress varbind (1.3.6.1.6.3.18.1.3), Spectrum prioritization logic uses this address for the EventModel name. This varbind takes precedence over the hostname provided in Event Variable 1.

Resolution

To ensure EventModels are named using the hostname from Event Variable 1, use one of the following workarounds:

1. Modify the Trap Source: Configure the sending device or application to exclude the snmpTrapAddress (1.3.6.1.6.3.18.1.3) varbind from the trap payload.
2. Cleanup Existing Models: After modifying the trap source, delete the incorrectly named EventModels in Spectrum. They will be recreated using the hostname upon the arrival of the next trap.