IBM 990 - Manual (Page 173)

Chapter 7. Sysplex functions 161
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Figure 7-2 z990 SE workplace: External Timer Reference Configuration panel
The network ID configured on the z990 must match the actual Sysplex Timer network ID to
which the server is connected. If the network ID entered on the SE panel does not match the
network ID that was assigned to the Sysplex Timer, the timer port enters a semi-operation
state. In this state, the port is disabled from stepping, but still receives configuration data from
the attached Sysplex Timer.
The ETR status information panel, shown in Example 7-1, displays the configuration status.
After IPL, the configuration can be identified to any attached z/OS image by issuing the
Display ETR command. The command output identifies the ETR configuration, including ETR
ID and ETR Network ID (see the following example).
Example 7-1 Display ETR
D ETR
IEA282I 16.30.19 ETR STATUS 686
SYNCHRONIZATION MODE = ETR CPC SIDE = 0
CPC PORT 0 <== ACTIVE CPC PORT 1
OPERATIONAL OPERATIONAL
ENABLED ENABLED
ETR NET ID=00 ETR NET ID=00
ETR PORT=11 ETR PORT=11
ETR ID=04 ETR ID=03