Assignment Window Example
This example illustrates how the Local Internet Registry (LIR)’s Assignment Window (AW) is used:
How an LIR chooses whether or not to request approval from the RIPE NCC by filling out a “PROVIDER AGGREGATABLE (PA) ASSIGNMENT REQUEST FORM” when making an assignment to an End User. To decide, the LIR has to ask itself the following question:
A: Count back 12 months to find out!
i.e. Add up all the assignments to that End User within the last 12 months (excluding assignments approved by the RIPE NCC). (let say the sum = x)
The number of additional IP addresses needed to reach your LIR's AW is the size of the assignment you can give them today without having to ask for approval. (AW-x)
Let us suppose the LIR nl.animals received an AW of /21 from the RIPE NCC.