301B: BIG-IP LTM Specialist: Maintain and TroubleshootDemo

By F5 · Question Mode

QuestionQ15

Identify and Resolve LTM Device Issues

A high-availability (HA) pair configuration relies only on the hardwired serial-cable connection to determine device state. A power outage affects the PDU that powers the active unit. The standby unit assumes the active role as expected.

How can the peer unit determine that the active unit is unavailable?

  • A voltage loss on serial cable
  • B no data stream received on serial port
  • C no response on management interface
  • D no heartbeat packets received on self IPs
Explanation

Hardwired serial failover uses a voltage heartbeat sent between the two units. When the active unit loses power, its voltage signal on the serial failover cable disappears; the standby peer detects that voltage loss and takes over.

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