Cisco Unified Contact Center Enterprise Solution Reference ...

Chapter 11 Bandwidth Provisioning and QoS Considerations
Network Segments
OL-8669-05
Unified CCE Network Architecture Overview
The fault-tolerant architecture employed by Unified CCE requires two independent communication
networks. The private network (or dedicated path) carries traffic necessary to maintain and restore
synchronization between the systems and to allow clients of the Message Delivery Subsystem (MDS) to
communicate. The public network carries traffic between each side of the synchronized system and
foreign systems. The public network is also used as an alternate network by the fault-tolerance software
to distinguish between node failures and network failures.
Note The terms public network and visible network are used interchangeably throughout this document.
A third network, the signaling access network, may be deployed in Unified ICM systems that also
interface directly with the carrier network (PSTN) and that deploy the Hosted Unified ICM/Unified CCE
architecture. The signaling access network is not addressed in this chapter.
Figure 11-1 illustrates the fundamental network segments for a Unified CCE system with a duplexed PG
and a duplexed Central Controller (with sides A and B geographically separated).
Figure 11-1 Example of Public and Private Network Segments for a Unified CCE System
Central
Controller A
Center Controller Site
Private Network
Public Network
Central
Controller B
PG A PG B
PG Site Private Network
143807
Cisco Unified Contact Center Enterprise 7.x SRND
11-3