Specifications

10-5
Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 10 Cisco IGX 8400 Series IP Service
IP Service—Functional Overview
Figure 10-3 Cross Connects and Links Between Switches
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:
• Bandwidth
• QoS guarantees
– Max CLR
– Max CDV
After CAC, the VSI slave accepts a connection setup command from the VSI master in the MPLS
controller, and receives connection information including service type, bandwidth parameters, and QoS
parameters. This information is used to determine an index into the VI’s selected Service Template VC
Descriptor table which establishes access to the associated extended parameter set stored in the table.
A preassigned ingress service template containing CoS Buffer links manages ingress traffic.
Switch
35712
MPLS controller
Slave
Slave
Switch
LER
LER
1
2
2
2
1
= Link
= Cross-connect
= Interslave connection
Application
Master
Application
Master
MPLS controller
Slave
Slave
Slave
Slave
Slave
= Master-slave connection