Viewing Layer 2 Neighbors

The Neighbors page (Device Viewer > Device/Network Explorer > Neighbors) lists devices that NetMRI determines to be adjacent to the device at Level 2. This feature does not describe neighboring devices at Level 3.

Layer 2 neighbors can report a substantial body of information. Typically, only the VLAN ID, VLAN Name, Neighbor (in its resolved DNS name), and the Neighbor Interface ID are reported. You can display many more data columns, including (but not limited to) the following:

• VRF Name: The listed name of the local interface's VRF network, if applicable.

• Neighbor VRF Name: The listed name of the neighboring interface's VRF, if applicable.

• Neighbor Network View: The listed name of the neighboring device's network view, if the device is in a different network view.

• Network View: The network view to which the device belongs.

• Root Bridge Address: This is the MAC address ID of the root bridge in the spanning tree.

• Interface MAC and Neighbor MAC: These are MAC addresses of the listed local and neighboring interfaces.

• Neighbor Type: These are typically Switch or Switch-Router in NetMRI.

• Device Assurance: The probability that NetMRI has correctly identified the type of a given device.

• Ifindex: The local interface index value into the SNMP table (ifTable).

• Interface Type: Typically appears as ethernet-csmacd on switched-Ethernet networks.

• Neighbor Location: A plain-language notation of the physical location of the device associated with the neighboring interface.

• Neighbor ifindex: The index value into the SNMP table (ifTable) that the L2 neighbor is associated with.