Connection Admission Control; Figure 23-4 Cross Connects And Links Between Switches; Table - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 23 Configuring BXM Virtual Switch Interfaces

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.
Service templates used for egress traffic are described here.
Ingress traffic is managed differently and a pre-assigned ingress service template containing CoS Buffer
links is used.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
MLPS controller
Application
Master
Slave
Slave
Slave
2
= Link
1
2 = Cross-connect
Qbin
Service Class
max CLR
max CTD
max CDV
MLPS controller
Application
Master
Slave
Slave
1 2
Slave
Switch
Cisco BPX 8600 Series Installation and Configuration
Overview: How VSI Works
Slave
Switch
CPE
23-13