8. Network Glue common questions

Why was there no hierarchy found in my network diagram (e.g. all devices are attached to a single node?) Why were IP addresses discovered but not MAC addresses?

If SNMP hasn’t yet been enabled on all or some of your network devices, then your network diagram will not display the proper hierarchy. Further, enabling SNMP can be a helpful troubleshooting tool. In the device matching page, you can see if SNMP has worked for a particular device and toggle the settings to work towards a solution. Please refer to our Guide to successful Network Glue deployment KB article for details on SNMP.

Also, check if you have Group Policy (GPO) configured in your Active Directory (AD) on your network. If so, note that you will be able to enable SNMP only ones for all devices throughout the network GPO. If you do not have GPO enabled, you will need to enable SNMP for every device separately.

What does a network diagram with proper hierarchical structure look like? In contrast, what does an incorrectly structured network diagram look like?

Example of a correct/good hierarchical structure:


Example of an incorrect/poor hierarchical structure:


Why aren’t the devices discovered by Network Glue matching to my existing IT Glue configurations?

If your Network Glue devices are not matching to your IT Glue configurations, this means that either your MAC addresses are not documented within IT Glue or, the MAC addresses were not discovered by Network Glue.

Network Glue and IT Glue matching logic is dependent on matching the MAC addresses of the devices. If the MAC address is not available for a particular device in either platform, then matching will be unsuccessful. In this case, refer to our Guide to Network Glue device matching KB article and manually match the devices.

Why are some of my network devices not being discovered by Network Glue?

Your firewall monitors and controls your network traffic based on a set of predetermined security rules. Your subnets can be configured in a very tightly secured fashion. Some of the subnet configuration rules ensure that not just any tool can discover the devices on your network without explicit permission. As such, the rules may be preventing Network Glue or any other network discovery/monitoring tool from discovering all your devices. In this case, you will need to install an additional collector per subnet to identify undiscovered devices on the undiscovered subnets. Network Glue allows you to install an unlimited number of collectors.

What does a good network topography look like? How should the network devices be related to each other on a network diagram?

Example of a good network topography:


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