NEIP addresses help managed terminals to access the NEs and allow addressing between NEs in IP networking. An NEIP address consists of a network number and a host number. A network number uniquely identifies a physical or logical link. All NEs along the same link have the same network number. A network number is obtained using the AND operation on the 32-bit IP address and corresponding subnet mask.
The NEIP address is derived from the NEID when the NE is initialized. The NEIP address is in the format 140.subnet number.basic ID. The vendor has assigned 140.x.y.z for Nokia routers.
For example, if the NEID is 0x09BFE0, which is 1001.10111111.11100000 in binary format, the NEIP address is derived as follows.
The subnet number is represented by the 8 most significant bits 00001001, which is 9 in decimal format. 9 is the default value.
The basic ID is represented by the 16 least significant bits 10111111.11100000, which is 191.224 in decimal format.
The NEIP address derived from the NEID 0x09BFE0 is 140.9.191.224.
Until the NEIP is configured manually, the NEIP address is derived from the NEID; changes to the NEID cause the associated NEIP address to change. After the NEIP address is configured manually, that NEIP no longer changes when the associated NEID changes.