Starting Admission Control; Admission Control Interface Table; Configuring Traffic-Engineering Resources - Juniper JUNOSE 11.2.X BGP AND MPLS Configuration Manual

JunosE 11.2.x BGP and MPLS Configuration Guide

Starting Admission Control

Admission Control Interface Table

Configuring Traffic-Engineering Resources

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Admission control operates on a router-wide basis rather than a per-virtual-router basis.
Admission control of resources begins when either of the following occurs:
You configure resource-related information about an interface, including bandwidth
(either total bandwidth or MPLS reservable bandwidth), flooding frequency, flooding
threshold, administrative weight, or attribute flags.
MPLS begins to use admission control services; for example, by attempting to set up
a constraint-based LSP.
Configuring bandwidth on an interface creates an entry for the interface in the admission
control interface table. Each entry in the table stores the following information per
interface:
Maximum (physical or line-rate) bandwidth
Maximum reservable bandwidth
The following information per IP class (currently a single, default class)
Total available (unreserved) bandwidth
Available bandwidth at each MPLS priority level
Resource flooding threshold and period
The resource flooding threshold and period together control the flooding of the resource
information by the IGP protocols, IS-IS and OSPF.
You can configure the following resource-related information about an MPLS interface
(at either the major interface or subinterface level):
Bandwidth—Total bandwidth that can be reserved on the interface
Flooding thresholds—Sets of absolute percentages of total reservable bandwidth that
trigger the new bandwidth value to be flooded throughout the network; flooding is
triggered when bandwidth increases past any up threshold value or decreases past
any down threshold value
Flooding frequency—Periodicity with which the bandwidth value is flooded, apart from
any flooding due to value changes
Administrative weight—Weight assigned to the interface that supersedes any assigned
by the IGP
Attribute flags—32-bit value that assigns the interface to a resource class and enables
a tunnel to discriminate among interfaces by matching against tunnel affinity bits
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