Traffic Management; Connection Admission Control; Table 3: Scheduling Priorities For Traffic Classes - Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual

For more information, see chapter Configuring Layer 2 Services over MPLS in JUNOSe
BGP and MPLS Configuration Guide.
NOTE: The E120 and E320 routers do not support ATM over MPLS with VCC cell
relay encapsulation in the current release.

Traffic Management

The scheduling priority for traffic classes depends on the type of router that you
have. Table 3 on page 7 describes the scheduling priorities for each type of router.

Table 3: Scheduling Priorities for Traffic Classes

The level of support for traffic management depends on the specific I/O module or
IOA. See "Supported Features" on page 12.

Connection Admission Control

ATM networks use connection admission control (CAC) to determine whether to
accept a connection request, based on whether allocating the connection's requested
bandwidth causes the network to violate the traffic contracts of existing connections.
CAC is a set of actions that the network takes during connection setup or
renegotiation.
The router supports CAC on PVCs on major ATM interfaces. This implementation of
CAC determines available bandwidth based on port subscription bandwidth. The
router maintains available bandwidth for each major ATM port. Bandwidth for VP
tunnels is included in CAC computations.
Scheduling Priority ERX7xx Models, ERX14xx
(from Highest to Models, or the ERX310
Lowest) Broadband Services Router
1 The following traffic classes are
prioritized equally:
CBR
VBR-RT
2 The following traffic classes are
prioritized equally:
VBR-NRT
UBR with a peak cell rate
(PCR)
3 UBR without PCR
4 –
Chapter 1: Configuring ATM
E120 and E320 routers
CBR
VBR-RT
VBR-NRT
UBR with or without PCR
Overview
7