Before using this chapter, ensure that the Dual IP package is installed.

Using the Dual IP address feature, you can switch over to a secondary IP for an ESS/LSP survivable CMS when the connection to the primary Communication Manager system fails. CMS remains connected to the ESS/LSP until the connection is lost, either through a manual link reset or other interventions.

To support survivability in distributed Communication Manager environments, CMS establishes connections with ESS/LSP nodes. Only one secondary IP/host address for one alternate connection is allowed per ACD.

To use the Dual IP feature, you must use the Processor Ethernet (PE) ports instead of the C-LAN ports. Using CMS, you can arrange an alternate IP address to the survivable satellite ESS/LSP in addition to the primary link to the main Communication Manager system for each ACD. CMS establishes a link to either the primary the Communication Manager system or the secondary ESS by connecting to the primary IP address, and then to the secondary IP address when the primary IP address fails to register.