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After you have associated a CLAN or Processor Ethernet host name or IP address with the switch connection, you may optionally populate the Survivability Hierarchy list. If your Communication Manager High Availability configuration employs the use of an Enterprise Survivable Server (ESS or survivable core server) or a Local Survivable Processor (LSP or survivable remote server), the ESS or the LSP should be added to the hierarchy. The Survivability Hierarchy list specifies the precedence of ESS or LSP nodes within the selected switch connection.