Cisco WS-X4604-GWY - VoIP Gateway Especificaciones descargar pdf (Pagina 91)

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Cisco IP Telephony Network Design Guide

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Chapter 3 Cisco CallManager Clusters

Intercluster Communication

To ensure that only a single Cisco CallManager is active at a time, all devices

should be assigned to a single Cisco CallManager redundancy group. This

Cisco CallManager redundancy group consists of a prioritized list of up to three

Cisco CallManagers. For a centralized call processing cluster, only a single

Cisco CallManager redundancy group is recommended, and it should be the

default group. In the example shown in Figure 3-10, the redundancy group

consists of three Cisco CallManagers, with A as the primary, B the secondary, and

C the tertiary Cisco CallManager.

Figure 3-10 Cisco CallManager Redundancy Group Configuration

A typical centralized call processing model might deploy only two

Cisco CallManagers. In this case, Cisco recommends that the normally inactive

(secondary) Cisco CallManager be the publisher. For a cluster of three

Cisco CallManagers, we recommend a dedicated publisher (tertiary) with IP

phones and gateways assigned to the primary and secondary Cisco CallManagers.

Figure 3-11 depicts a hybrid deployment model in which a campus cluster is

interconnected with two clusters that perform centralized call processing. This

example shows that multiple centralized call processing clusters can be deployed

and interconnected using H.323. Connectivity to the campus cluster is also

achieved using H.323. If intercluster call admission control is required, a

gatekeeper can be assigned.

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 91