Question

Difficulty: MediumRemote Access and Out-of-Band Management

A network administrator is designing an out-of-band (OOB) management architecture for edge router console access and remote reboot capabilities during a primary network outage. Which of the following solutions should be implemented to achieve full OOB administrative control and power management under these conditions? (Select TWO).

  1. Connect device RS-232 console ports to a centralized terminal server linked to an auxiliary cellular modem networkAnswer
  2. B
    Deploy Telnet across primary Ethernet interfaces to maintain low-overhead remote command-line access
  3. Install a smart switched Power Distribution Unit (PDU) connected to an independent out-of-band management networkAnswer
  4. D
    Enable SNMPv2c read-write community strings over primary LAN interfaces for remote system resets

Answer

The correct architecture requires connecting device serial console ports to a terminal server and deploying a smart switched PDU on an independent out-of-band network.
Out-of-band (OOB) management operates independently of the primary production network. Connecting device serial console ports to a terminal server grants command-line interface access even if the primary operating system or network link drops. Furthermore, deploying a smart switched PDU allows remote administrators to power-cycle unresponsive hardware over the dedicated OOB path when software-based reboots are impossible.

Step-by-Step Solution

1
Evaluate the requirement for console access during network link failures.
In-band IP services fail when WAN links go down, requiring serial console access aggregated through a terminal server over an out-of-band connection.
Terminal servers provide access to the hardware CLI independently of the primary IP routing stack and network interfaces.
2
Evaluate remote power management needs for hung or frozen appliances.
Switched PDUs afford out-of-band power-cycling capabilities to hard-reset unresponsive network devices.
If an operating system crashes completely, software commands will not respond, necessitating physical power interruptions via a managed PDU.

Key Concept

Out-of-Band Management (OOB) Architecture
Rate this question