Once the LSP passes admission control, bandwidth is allocated to it. The bandwidth allocation procedure examines the LSPs hold priority and mean-rate settings. The amount of bandwidth specified by the mean-rate is allocated to the LSP, using reservable bandwidth available at the LSPs hold priority level.
In this example, the LSPs hold priority is three and mean-rate is 1,000 Kbps. On this interface, for priority level three, up to 10,000 Kbps can be reserved. The amount of bandwidth specified by the mean-rate (1,000 Kbps) is allocated to the LSP.
After bandwidth is allocated to this LSP, the amount of unreserved bandwidth on the interface is reduced accordingly. In the example, the reservable bandwidth array for the interface now looks like this:
|
Priority |
Unreserved Bandwidth |
|
0 |
10,000 |
|
1 |
10,000 |
|
2 |
10,000 |
|
3 |
9,000 |
|
4 |
9,000 |
|
5 |
9,000 |
|
6 |
9,000 |
|
7 |
9,000 |
|
Active : LSP with setup 6, hold 3, mean-rate 1,000 |
|
Given the bandwidth allocation above, when an LSP is established with a setup priority of three and a mean-rate of 9,500 Kbps, it would not pass admission control because only 9,000 Kbps is available at priority 3.