Connection Admission Control; Figure 23-4 Cross-Connects And Links Between Switches - Cisco BPX 8620 Installation And Configuration Manual

Overview: How VSI Works

Figure 23-4 Cross-Connects and Links between Switches

CPE

Connection Admission Control

When a connection request is received by the VSI slave, it is first subjected to a Connection Admission
Control (CAC) process before being forwarded to the FW layer responsible for actually programming
the connection. The granting of the connection is based on the following criteria:
LCNs available in the VSI partition:
•
•
QoS guarantees:
•
•
•
When the VSI slave accepts (that is, after CAC) a connection setup command from the VSI master in the
MPLS controller, it receives information about the connection including service type, bandwidth
parameters, and QoS parameters. This information is used to determine an index into the VI's selected
Service Template's VC Descriptor table thereby establishing access to the associated extended parameter
set stored in the table.
Ingress traffic is managed differently and a preassigned ingress service template containing CoS Buffer
links is used.
Cisco BPX 8600 Series Installation and Configuration
23-6
MLPS controller
Application
Master
Slave
Slave
Slave
2
= Link
1
2 = Cross-connect
Qbin
Service Class
max CLR
max CTD
max CDV
Chapter 23
MLPS controller
Application
Master
Slave
Slave
1 2
Slave
Switch
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Configuring BXM Virtual Switch Interface
Slave
Switch
CPE