 | Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |
MPLS traffic engineering uses admission control to keep track of resource information. Admission control has an accounting feature that ensures that requests are not accepted when the router does not have sufficient resources to accommodate them.
Currently, bandwidth (BW) and bandwidth-related information are the only resources tracked and used for traffic engineering. Admission control determines whether a setup request can be honored for an MPLS LSP with traffic parameters.
Admission control provides bandwidth information to the IGP protocols, ISIS and OSPF. As new LSPs are created, the available bandwidth decreases. The IGPs can subsequently advertise this information and use it for SPF calculations to determine paths that satisfy the traffic requirements. You can configure readvertisement to occur periodically or when the change crosses some threshold.
| Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |