Specifications

Chapter 2 Managing the GSS from the CLI
Changing the GSSM Role in the GSS Network
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Cisco Global Site Selector Administration Guide
OL-5480-01
Changing the GSSM Role in the GSS Network
The GSS software supports two GSSM devices in a single GSS network, with one
GSSM acting as the primary GSSM and the second GSSM acting as a standby
device. The standby GSSM is capable of temporarily taking over the role of the
primary GSSM in the event that the primary GSSM is unavailable (for example,
you need to move the primary GSSM or you want to take it offline for repair or
maintenance).
Using the CLI, you can manually switch the roles of your primary and standby
GSSM devices at any time.
Before switching GSSM roles, note the following guidelines:
• You must configure and enable both a primary and a standby GSSM in your
GSS network. Do not attempt to switch GSSM roles until you configure and
enable both a primary and a standby GSSM (refer to the Cisco Global Site
Selector Getting Started Guide).
• Ensure that the designated primary GSSM is either offline or configured as a
standby GSSM before you attempt to enable the standby GSSM as the new
primary GSSM. Having two primary GSSM devices active at the same time
may result in the inadvertent loss of configuration changes for your GSS
network. Although DNS request routing continues to function in such a
situation, GUI configuration changes made on one or both primary GSSM
devices may be lost or overwritten and is not communicated to the GSS
devices. If this dual primary GSSM configuration occurs, the two primary
GSSM devices change to standby mode. You must then reconfigure the
original deployed primary GSSM as the primary GSSM.
• The switching of roles between the designated primary GSSM and the
standby GSSM is intended to be a temporary GSS network configuration until
the original primary GSSM is back online. Use the interim primary GSSM to
monitor GSS network behavior and, if necessary, to make configuration
changes.
This section contains the following procedures:
• Switching the Roles of the Primary and Standby GSSM Devices
• Reversing the Roles of the Interim Primary and Standby GSSM Devices