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:
Q: How many IP addresses can I assign today to an End User without having to ask for an approval?
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)
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.
nl.animals has 3 End Users: Redfox Ltd, Greenfish Ltd and Pinkcat Ltd.
In the diagrams below the timelines are horizontal. The number of IP addresses that can be assigned directly at any time (without needing approval from the RIPE NCC) is represented by the height of the shaded area. Assignments are represented by boxes and vertical arrows. Pink boxes represent assignments requested from the RIPE NCC.
CLICK THESE DIAGRAMS FOR LARGER VERSIONS
Note that assignments that have been requested from the RIPE NCC (represented by pink boxes) are not counted when adding up all assignments made for a certain End User within the LIR’s AW.