Hi @VivekSattanatha 

The KB article does not explain IP switch -- > Ip router  relationship debug 😞.

Debugging procedure

• Set the ’sa.discolog.sys_log’ system property to true.
• Run the following script in scripts-background: ​
  
  • var npm = new SNC.NetworkPathManager();
  • npm.createPhysicalConnections(ciId);
• In case of layer 2 connection between a server and switch, the ciId should be the sys id of the server.​
• In case of layer 2 connection between 2 switches, the ciId should be the sys id of one of the switches.
• Look at the debug messages to understand why the connection was not created.
• Note: The actual relation in the CMDB is created between the ports of the devices or between port of one device directly to another device (in case the target port was not found).
• The algorithm is not creating a direct relation between the server and the network device or between 2 network devices.

Also servicenow doc does not provide relation ship between IP Switch ---> IP Router.

How Layer 2 Discovery works