Infoblox NIOS-DDI-Expert Exam Questions Instant Access

Question 1

By default, how do peers in an Infoblox DHCP Failover association operate in NORMAL mode?

AThe primary peer answers roughly half of the lease requests and the secondary answers the other half

BWhichever peer receives the request first will answer the request

CThe primary answers all lease requests up to the utilization threshold, then the secondary answers requests

DThe primary answers all lease requests

Answer : A

Comprehensive and Detailed In-Depth

DHCP Failover in NIOS ensures redundancy and load balancing between primary and secondary peers in NORMAL mode:

Default Behavior: The lease pool is split (typically 50/50 unless customized via 'split' settings), and each peer manages its portion. Clients send DHCPDISCOVER broadcasts, and relays (or direct requests) distribute them to both peers. The peers coordinate via TCP 647, ensuring:

Primary answers from its half.

Secondary answers from its half.

Load is roughly balanced (not precisely 50/50 due to relay behavior).

Options:

A: Matches the default split-pool design, where peers share the load. Correct.

B: 'First come, first serve' isn't how failover works---peers don't race; they use pool allocation. Incorrect.

C: No utilization threshold triggers a switch---both peers serve concurrently from their pools. Incorrect.

D: Primary-only answering defeats failover's redundancy and balancing. Incorrect.

Practical Example: In an INE lab, you'd configure a 50/50 split, simulate client requests, and troubleshoot lease distribution via DHCP logs, verifying NORMAL mode behavior.

Question 2

Which CSV export format is recommended for tasks that involve data manipulation and reimporting to the NIOS Grid?

AInfoblox CSV Import Format

BStandard CSV (Visible) Format

CBoth formats are equally suitable

DNeither format is suitable for data manipulation

Answer : A

Comprehensive and Detailed In-Depth

NIOS supports two CSV export formats in Grid Manager (Data Management > Export):

Infoblox CSV Import Format: Structured specifically for NIOS, with headers matching import fields (e.g., 'fqdn,ip_address,mac_address'). Includes all necessary metadata for reimporting, making it ideal for editing (e.g., in Excel) and reuploading via the Data Import Wizard (DIW).

Standard CSV (Visible) Format: A human-readable format showing only visible Grid Manager data, lacking the full structure for reimport. It's better for reporting or external analysis, not manipulation/reimport.

Why A: The Infoblox format ensures compatibility with NIOS's import process, preserving object relationships and mandatory fields (e.g., marked with *). Editing and reimporting in this format maintains data integrity.

Option Analysis:

B: Standard format isn't designed for reimport---missing fields cause import failures. Incorrect.

C: They serve different purposes; only Infoblox format suits reimporting. Incorrect.

D: Infoblox format is suitable, so this is false. Incorrect.

Practical Example: In an INE lab, you'd export DNS records in Infoblox CSV format, update IPs, and reimport to test bulk management, a Grid deployment skill.

Question 3

Which syslogs can be used to view boot-up messages from the last reboot of an Infoblox appliance? Choose 3 answers

ASyslog via the remote console

BSyslog that has been redirected to an external syslog server

CSyslog via the serial console

DSyslog via the NIOS GUI

Answer : A, B, C

Comprehensive and Detailed In-Depth

Boot-up messages from an Infoblox appliance are logged in the syslog, which records system events like reboots. These logs can be accessed in multiple ways:

A (Remote Console): SSH or remote console access (e.g., via 'show log syslog' CLI command) shows syslog entries, including boot messages.

B (External Syslog Server): If configured, NIOS redirects syslog to an external server, preserving boot messages for review.

C (Serial Console): Direct serial connection during boot captures real-time syslog output, including startup messages.

D (NIOS GUI): The GUI provides a syslog viewer (Grid > Grid Manager > Logs), but it's not designed for real-time boot message capture and may not show full historical detail unless explicitly exported. The INE course emphasizes troubleshooting via logs, including these methods.

Question 4

An administrator redirects audit log output to syslog on an Infoblox appliance. This audit log output will be logged on any defined remote syslog servers.

ATrue

BFalse

Answer : A

Comprehensive and Detailed In-Depth

Audit log redirection in NIOS:

Setup: In Grid Manager (Administration > Logs > Syslog), enable ''Redirect audit log to syslog.'' Audit events (e.g., config changes) merge into syslog.

Behavior: If remote syslog servers are defined (Grid > Grid Properties > Syslog Servers), all syslog data---including audit logs---is sent there.

Why True: Redirection ensures audit logs reach all configured remote servers alongside local syslog.

Practical Example: In an INE lab, redirect audit logs, change a DNS record, verify syslog on a remote server, and troubleshoot logging.

Question 5

You are asked to provide a support bundle while on the phone with Infoblox Technical Support. What can you do to get one?

ACreate a database backup and extract the support bundle from it

BUse the CLI command 'set support_bundle' to get it

CRetrieve it from the GM interface by navigating to Grid Manager and downloading from the toolbar

DInfoblox Technical Support must generate it

Answer : B

Comprehensive and Detailed In-Depth

Generating a support bundle for diagnostics:

B: CLI command set support bundle (space, not underscore) generates and downloads a bundle (.tar.gz) with logs, configs, etc. Correct with typo adjustment.

A: Backup is separate (Grid > Backup)---no bundle extraction. Incorrect.

C: GUI offers download (Grid > Grid Manager > Toolbar > Download Support Bundle), but question specifies action---CLI fits phone context. Partially correct but not best.

D: Support assists but doesn't generate---user action required. Incorrect.

Practical Example: In an INE lab, run set support bundle, transfer it via SCP, and troubleshoot with support.

Question 6

A firewall change has interrupted the DHCP Failover communication between two DHCP Failover peers. Both peers are still online and can communicate to clients, but the state is now COMMUNICATIONS INTERRUPTED. What should the administrator do?

ANothing

BPlace the Primary peer into PARTNER-DOWN

CPlace the secondary peer into PARTNER-DOWN

DChange split value

Answer : C

Comprehensive and Detailed In-Depth

DHCP Failover peers sync leases via TCP 647. A firewall blocking this shifts the state to COMMUNICATIONS-INTERRUPTED:

State Impact:

Both peers serve existing clients and limited new leases (via MCLT).

No sync occurs, risking lease conflicts if prolonged.

Best Action: Manually set one peer to PARTNER-DOWN (Grid > DHCP > Failover > Edit), giving the other full pool control to avoid conflicts.

Why Secondary: Conventionally, the secondary is set to PARTNER-DOWN, letting the primary take over as the authoritative peer (per Infoblox best practices).

Options:

A: Doing nothing risks conflicts if new leases exceed MCLT capacity. Incorrect long-term.

B: Primary to PARTNER-DOWN cedes control to secondary, less standard. Incorrect.

C: Secondary to PARTNER-DOWN empowers primary, aligning with failover design. Correct.

D: Changing split value doesn't address sync loss. Incorrect.

Practical Example: In an INE lab, you'd simulate this, set secondary to PARTNER-DOWN, and troubleshoot lease consistency post-firewall fix.

Question 7

How can an administrator access the NIOS Online Documentation through the Grid Manager UI?

AFrom Administration > Logs > Toolbar > Download

BFrom Tools > Download Support bundle

CFrom Tools > Download Admin guide

DFrom Help > Documentation > NIOS Online Documentation

Answer : D

Comprehensive and Detailed In-Depth

NIOS Online Documentation is accessible via Grid Manager:

D: Help > Documentation > NIOS Online Documentation opens a browser to the latest NIOS docs (e.g., Admin Guide) hosted online or locally. Correct.

A: Logs > Download is for syslog/support bundles, not docs. Incorrect.

B: Tools > Support Bundle is diagnostics, not documentation. Incorrect.

C: No ''Download Admin guide'' option exists under Tools. Incorrect.

Practical Example: In an INE lab, you'd access docs via Help to troubleshoot a Grid join issue, testing resource navigation.

Infoblox Qualified NIOS DDI Expert - INE NIOS-DDI-Expert Exam Questions