Error: update_remote_trap_directors failed with model 0x0 in Spectrum

Products

• Network Observability

Issue/Introduction

When deleting a device from a remote landscape, Spectrum fails notifying the TrapDirector to remove the device from its Remote Forwarding Cache.

This leaves the device in the remote forwarding cache and should age out (Remote Forwarding Cache Age Out time), however, in some instances users
   might be replacing devices with newer models and the same IP. When the new model is discovered TrapDirector still routes traps for that IP to the old
   model_handle resulting not seeing the trap events on the new model.

Alert Manager Debug (VNM.OUT) may show the following error after deleting the device.

ERROR MESSAGE:
"CsAlertFwdMgr::update_remote_trap_directors() failed while sending update to remote server, model = 0x0"

Environment

NetOps Spectrum 24․3․8 

Cause

ROOT CAUSE:

The device deletion notification fails to carry the necessary context to clear the cache automatically․ The Trap Director receives an empty Model Handle (0x0) instead
   of the correct reference, causing the cache removal to fail․

Resolution

WORKAROUND:

• Manually clear the Remote Forwarding Cache on the MLS VNM model. This will trigger a new Distributed Find and should locate the new device with its new model_handle.
  

 

Fix:

• Spectrum_24.03.08.D323a (being verified)