How is it possible to check the activation status of GMRE on a node?

The supervision state, displayed in the "Supervision State" column of the Network Element (NE) list within the Nokia NFM-T (Network Functions Manager - Transport), is the primary indicator of the management status of a node. For a node to be in a "Managed" state, the NFM-T must have established and maintained successful communication via the management control plane. In Nokia optical networks, this communication relies on the Generic Management Routing Engine (GMRE). If GMRE is not activated or is malfunctioning, the NFM-T cannot communicate with the node, causing its supervision state to change to "Unreachable". Therefore, this state directly reflects the operational status of GMRE.

A. A ping request only verifies basic IP layer (Layer 3) connectivity to the node's management interface; it does not confirm that the GMRE application is active and functioning correctly.
B. The NFM-T graphical user interface does not have a column named "ControlPlane status" in the node list; the correct column for this information is "Supervision State".
D. The color of the node's icon indicates the highest severity of active alarms on that node (e.g., red for critical), not its management supervision or GMRE status.

1. Nokia Network Services Platform (NSP) Network Functions Manager - Transport (NFM-T) R21.11 User Guide, Document ID: 3HE-17311-AAAA-TQZZA, Edition 01.

Reference: Chapter 4, "Working with network elements", Section: "Network element list". This section details the columns in the NE list, including "Supervision State". It describes the "Managed" and "Unreachable" states, which are direct consequences of the health of the management communication path provided by GMRE.

2. Nokia 1830 Photonic Service Switch (PSS) Engineering and Planning Guide, Release 11.2, Document ID: 3KC-53111-AAAA-TCZZA, Edition 01.

Reference: Chapter 10, "DCN Engineering", Section: "GMRE". This chapter explains that GMRE is fundamental for the control plane that supports the DCN. It states, "The NFM-T uses the DCN to communicate with the 1830 PSS NEs for management purposes." The failure of this communication, which GMRE underpins, results in the node becoming unmanaged or unreachable in the NFM-T.