Migrating from ETR to STP-only CTN
In this chapter we describe how to migrate an existing External Timer Reference (ETR) network configuration to an STP-only CTN configuration and present the migration results. The starting point is an existing ETR network configuration consisting of one or more servers and Sysplex Timers. The intermediate status is a Mixed CTN, first in ETR timing mode, then in STP timing mode, preparing the migration to an STP-only CTN.
 
Important:
An IBM System zEC12 server cannot be in the same CTN as z9 or previous ...

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