Comprehensive and Detailed In-Depth

NIOS supports advanced DHCP configuration, including Option Filters, which match client requests

based on DHCP options (e.g., Option 60 for Vendor Class Identifier). If Avaya and Cisco VoIP phones

require the same DHCP option (e.g., Option 66 for TFTP server), the administrator can use separate

Option Filters to distinguish the devices by their unique identifiers (like Vendor Class IDs: "Avaya" vs.

"Cisco") and assign them IPs from the same range with the shared option. This allows both device

types to coexist on the same subnet and range, eliminating the need for segregation (Option B) or

vendor intervention (Option D). Option A is overly restrictive and incorrect. This is a practical DHCP

troubleshooting scenario in the INE course.

Reference: Infoblox NIOS Administrator Guide – DHCP Option Filters; INE Course Content: NIOS DDI

DHCP Troubleshooting.

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.

Reference: Infoblox NIOS Administrator Guide – Logging Configuration; INE Course Content: NIOS

DDI Grid Troubleshooting.

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.

Reference: Infoblox NIOS Administrator Guide – Logging; INE Course Content: NIOS DDI Grid

Troubleshooting.

Comprehensive and Detailed In-Depth

DHCP Failover states determine lease assignment:

B (NORMAL): Both peers assign from their pools—full capacity for new clients. Correct.

C (COMMUNICATIONS-INTERRUPTED): Surviving peer assigns new leases within MCLT limits. Correct.

D (PARTNER-DOWN): Single peer takes full pool, assigns new leases freely. Correct.

A (RECOVER DONE): Post-recovery state before NORMAL—typically doesn’t assign until synced, but

documentation varies. Likely incorrect here unless transitional.

Practical Example: In an INE lab, test each state, monitor new client IPs, and troubleshoot capacity

limits.

Reference: Infoblox NIOS Administrator Guide – DHCP Failover States; INE Course Content: NIOS DDI

DHCP Troubleshooting.

Comprehensive and Detailed In-Depth

Global Search in NIOS (top-right search bar) offers Basic and Advanced modes:

Basic Mode Filters: Allows quick searches across Grid objects using:

DNS Name: Search by FQDN (e.g., "host.example.com"). Correct.

IP Address: Search by IPv4/IPv6 (e.g., "192.168.1.10"). Correct.

Record Type: Filter by DNS types (e.g., A, CNAME). Correct.

MAC Address: Available in Advanced mode (Data Management > Global Search > Advanced), not

Basic mode, which focuses on DNS/IP basics. Incorrect here.

Usage: Enter a term (e.g., "example.com"), select a filter, and view results (e.g., all A records).

Practical Example: In an INE lab, you’d use Basic mode to find all A records for "lab.com,"

troubleshoot DNS issues, and switch to Advanced for MAC searches.

Reference: Infoblox NIOS Administrator Guide – Global Search; INE Course Content: NIOS DDI DNS

Troubleshooting.