Cisco Unified Contact Center Enterprise Solution Reference ...
Cisco Unified Contact Center Enterprise Solution Reference ...
Cisco Unified Contact Center Enterprise Solution Reference ...
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<strong>Cisco</strong> <strong>Unified</strong> CallManager Redundancy<br />
10-8<br />
<strong>Cisco</strong> <strong>Unified</strong> <strong>Contact</strong> <strong>Center</strong> <strong>Enterprise</strong> 7.x SRND<br />
Chapter 10 Sizing <strong>Cisco</strong> <strong>Unified</strong> CallManager 4.x and 5.x Servers<br />
Table 10-1 lists the types of servers you can use for <strong>Cisco</strong> <strong>Unified</strong> CallManager for <strong>Unified</strong> CCE<br />
deployments, the main characteristics, and typical agent limits. These limits are not guaranteed to be<br />
possible in all deployment scenarios, but in normal call center deployments, these limits are typically<br />
possible. However, in all cases you must use the <strong>Cisco</strong> <strong>Unified</strong> CallManager Capacity Tool to verify that<br />
a specific system design will be supported.<br />
Table 10-1 Types of <strong>Cisco</strong> <strong>Unified</strong> CallManager Servers that Support <strong>Unified</strong> CCE<br />
Server Type Characteristics <strong>Unified</strong> CCE Recommendation<br />
Standard server:<br />
Single processor<br />
Up to a maximum of 100 agents<br />
MCS-7825<br />
Single power supply (not hot-swap)<br />
Non-RAID hard disk (not hot-swap)<br />
(Not recommended for mission-critical<br />
call centers above 50 agents)<br />
High-availability standard server: Single processor<br />
Up to a maximum of 250 agents<br />
MCS-7835 with battery-backed<br />
write cache (BBWC) installed<br />
Redundant power supplies (hot-swap)<br />
Redundant SCSI RAID hard disk array<br />
(hot-swap)<br />
(Maximum of 125 agents without<br />
BBWC installed)<br />
High-performance server:<br />
Dual processors<br />
Up to a maximum of 500 agents<br />
MCS-7845 with battery-backed<br />
write cache (BBWC) installed<br />
Redundant power supplies (hot-swap)<br />
Redundant SCSI RAID hard disk arrays<br />
(hot-swap)<br />
(Maximum of 250 agents without<br />
BBWC installed)<br />
The <strong>Cisco</strong> MCS-7815 server is not supported with <strong>Unified</strong> CCE deployments, but lab or demo setups<br />
can use this server. It is, however, a supported <strong>Cisco</strong> <strong>Unified</strong> CallManager platform for <strong>Cisco</strong><br />
<strong>Cisco</strong> <strong>Unified</strong> Communications deployments only.<br />
<strong>Cisco</strong> <strong>Unified</strong> CallManager Redundancy<br />
With <strong>Cisco</strong> <strong>Unified</strong> CallManager, you can choose from the following two redundancy schemes:<br />
2:1—For every two primary subscribers, there is one shared backup subscriber.<br />
1:1—For every primary subscriber, there is a backup subscriber.<br />
Due to the higher phone usage in contact centers and the increased downtime required during upgrades,<br />
the 2:1 redundancy scheme is not recommended for CallManager deployments with <strong>Unified</strong> CCE.<br />
Figure 10-1 illustrates these two options. This illustration only shows call processing subscribers and<br />
does not show publisher, TFTP, music on hold (MoH), or other servers. For details on additional cluster<br />
deployment and redundancy options, refer to the latest version of the <strong>Cisco</strong> <strong>Unified</strong> Communications<br />
<strong>Solution</strong> <strong>Reference</strong> Network Design (SRND) Guide, available at www.cisco.com/go/srnd.<br />
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