The NE ID is a unique identifier used by NSP, in both model-driven and classic management, to identify a managed network element. The NE ID can be an IP address, a hostname, or some other identifying string depending on the NSP device adaptation. The required configuration must be present on the NE prior to its discovery.

For the SR OS family of NEs, including SR, ESS, XRS, SAR, SAS, and IXR, this unique NE ID set to the NE’s system interface loopback address. System interfaces can be single stack (IPv4 or IPv6) or dual stack (IPv4 and IPv6). Which address is designated as the NE ID is defined in  Classic management NE IDs and  MDM SR OS NE IDs.

Classic management NE IDs

Single stack classic SR OS have their NE IDs set to the system interface IPv4 or the IPv6 address depending on which is present. NEs with single-stack IPv4 system interfaces retain their current NE ID when the IPv6 address is added to the system interface.

Classic SR OS with dual stack system interfaces select the IPv4 address as the NE ID.

MDM SR OS NE IDs

Single-stack MD SR OS have their NE IDs set to the system interface IPv4 or the IPv6 address depending on which is present.

MD SR OS with dual-stack system interfaces will select the IPv6 address as the NE ID.