Assume the following values:

• LIVTIME=15
• SRQTIME=15
• SRQRETRY=3

If an EE connection is not receiving data from the partner for 15 seconds (LIVTIME), VTAM® sends a test frame to test the connection. If the test does not receive a response within 15 seconds (SRQTIME), VTAM repeats this up to three more times (SRQRETRY). If after the third retry attempt no response has been received, the EE connection is disconnected. VTAM uses the following formula: LIVTIME + (SRQTIME* (SRQRETRY+1)). In this example, it would take roughly 75 seconds to disconnect the EE connection. Figure 1 shows the Enterprise Extender inactivity flows.

• a. Initial LIVTIME interval expires and no inbound HPR traffic is detected by this EE endpoint during this 15-second interval.
• b. The Logical Data Link Control (LDLC) layer sends a TEST request to the EE partner to determine whether the partner is still there. This is the initial TEST, which is not considered a retry. The LIST=DETAIL output for the D EEDIAG,SRQRETRY command will display the initial test as attempt number zero in message IST2074I.
• c. After each TEST request is sent, VTAM waits a period of time equal to the SRQTIME value (15 seconds in this example).
• d. No response is received from the partner within the SRQTIME interval. The LDLC layer sends another TEST. This is considered the second retry attempt up to a maximum of SRQRETRY value (three retries for this example).
• e. After each TEST request is sent, VTAM waits a period of time equal to the SRQTIME value (15 seconds in this example).
• f. No response is received from the partner within the SRQTIME interval. The LDLC layer sends another TEST request. This is considered the third retry attempt, which is the final retry in this example.
• g. After each TEST request is sent, VTAM waits a period of time equal to the SRQTIME value (15 seconds in this example).
• h. No response is received from the partner within the SRQTIME interval. The LDLC layer sends another TEST request. This is considered the third retry attempt, which is the final retry in this example.
• i. After the final TEST request is sent, VTAM waits a period of time equal to the SRQTIME value (15 seconds in this example). Because this was the final retry attempt, and no response was received from the partner EE node, the EE connection is terminated with message IST1430I.