Cisco WS-X4604-GWY - VoIP Gateway Especificaciones descargar pdf (Pagina 77)

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Cisco IP Telephony Network Design Guide

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Chapter 3 Cisco CallManager Clusters

Cluster Operation and Scalability Guidelines

Intracluster Communication

There are two primary kinds of intracluster communications within a

Cisco CallManager cluster (Figure 3-1). The first is a mechanism for distributing

the database that contains all the device configuration information. The

configuration database (Microsoft SQL 7.0) is stored on a publisher and

replicated to the subscriber members of the cluster. Changes made on the

publisher are communicated to the subscriber databases, ensuring that the

configuration is consistent across the members of the cluster as well as facilitating

spatial redundancy of the database.

The second intra-cluster communication is the propagation and replication of

run-time data such as registration of IP phones, gateways, and DSP resources.

This information is shared across all members of a cluster and assures the

optimum routing of calls between members of the cluster and associated

gateways.

Figure 3-1 Intracluster Communications

SQL

database

Intracluster

run-time data

Publisher

Subscriber

SubscriberSubscriber

Subscriber

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 77