Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & physical platforms portfolio.

Admission control

Admission control examines the LSPs setup priority and mean-rate settings to determine whether the LSP can be activated.

To pass admission control, the reservable bandwidth available at the LSPs setup priority level must be greater than the value specified by its mean-rate.

For example, when the maximum reservable bandwidth on an interface is 10,000 Kbps and no LSPs are currently active, the amount of reservable bandwidth on the interface for each priority level would be as follows:

Priority Unreserved Bandwidth
0 10,000
1 10,000
2 10,000
3 10,000
4 10,000
5 10,000
6 10,000
7 10,000
Active LSPs: None

The LSR receives a Resv message for an LSP that has a configured setup priority of six and a hold priority of three. The mean-rate specified for this LSP is 1,000 Kbps. For priority level 6, up to 10,000 Kbps can be reserved. Because the configured mean-rate for this LSP is only 1,000 Kbps, the new LSP passes admission control.