Interfaces discovered are being deleted/removed after discovery during post-processing

Products

• VMware Smart Assurance
• Network Observability

Issue/Introduction

Interfaces that are discovered during Smarts IP discovery are removed during post processing. The following entry is found in the Smarts IP log indicating device deletion after discovery:

DSCV-W-DELETE_COMPONENT-'IF-<Device_Name>/<Interface_Index> [<Interface Description>]' is no longer found on '<Device_Name>'. It is removed from topology

Environment

All Supported Smarts releases

Cause

The interface does not have an IP address.
By default, Smarts will only discover interface data for devices that have an IP address.
Interfaces that are discovered but then found to not have an IP address will be removed from the Smarts IP topology.

Resolution

You can change the default behavior so that Smarts IP will discover all Interfaces on devices whether or not the device's interface has an IP address. This can be done as follows:

• Open the tpmgr-param.conf configuration file for editing using sm_edit utility as
  

  sm_edit ../conf/discovery/tpmgr-param.conf

• Add the following line to the tpmgr-param.conf file:

  • IFTypePatternIFExt.<Device's SysOID> <INSERT IFType pattern Here>

• Save and close the tpmgr-param.conf file.
• Reload the tpmgr-param.conf file as follows:
  

  sm_tpmgr -s <IP_DOMAIN> --load-conf=tpmgr-param.conf

• Rediscover the device in Smarts IP. 
• Confirm that all Interfaces are discovered and not deleted in post-processing. 

Additional Information

You can view asl messages after enabling debug.

Debug commands:

./dmctl -s <AM-PM Domain> put ICF_TopologyManager::ICF-TopologyManager::DebugEnabled TRUE
./dmctl -s <AM-PM Domain> put ICF_TopologyManager::ICF-TopologyManager::LogDiscoveryProgress TRUE
./dmctl -s <AM-PM Domain> put ICF_TopologyManager::ICF-TopologyManager::LogTracing TRUE