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Technology Refresh Example 2: Production HDS/Distributor AW Upgraded Before the Central Controller Upgrade
Maintenance Window

In the second example, the production HDS/Distributor AW is upgraded before the central
controller upgrade maintenance window. If a secondary HDS/Distributor AW is not available,
a release 5.0 or release 6.0 temporary HDS/Distributor AW is set up to enable real-time reporting
and configuration between the time that the Side A HDS/Distributor AW is upgraded and the
time that the Upgraded HDS/Distributor AW is upgraded and the time the CallRouter, Logger,
and Distributor AW are brought into service.

For a technology refresh upgrade of an HDS/Distributor AW, it is only necessary to bring the
source HDS off-line during the backup/restore and registry export process.

Note: Instead of configuring and deploying a temporary release 5.0 or release 6.0
HDS/Distributor AW, you also have the option of bringing the source HDS back on line. This
option is not recommended if maximum reporting capacity and functionality is required during
upgrade, since the intent is to upgrade the Side A HDS/Distributor AW well in advance of the
Central Controller upgrade maintenance window. If you do choose this option, ensure the Logger
purge setting is long enough to prevent data loss.

None.

Upgrade the production
system to the required
baseline.

None.

1

No impact on the production
system.

Create the Active
Directory environment.

None.

2

No impact on the production
system.

Set up the new hardware.

None.

3

Required to enable configuration
and real-time reporting until the

Set up a temporary
release 5.0(0) or release
6.0(0) HDS/Distributor
AW.

1 hour

4

upgraded CallRouter, Logger, and
HDS/Distributor AW are brought
into service.

If a Side B HDS/Distributor AW is
available and the reporting capacity
of two HDSs is not required, it is

Upgrade Guide Cisco ICM/IPCC Enterprise & Hosted Editions Release 7.0(0)