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Configuration template

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

A configuration template is a standardized configuration definition that describes the desired state of a device or system.

A configuration template is a standardized definition of a device’s desired configuration. A central configuration-management server combines the template with device-specific variables to generate and apply configurations. section 25.2

Configuration templates support centralized management by:

  • Reusing one structure for devices with similar configurations while substituting values such as hostnames and interface addresses. section 25.2
  • Applying template or variable changes to the appropriate managed devices. section 25.2
  • Comparing active configurations with the expected template-defined state to detect deviations and enforce standards. section 25.2
hostname {{hostname}}                    #1
ntp server 172.16.1.1
ip name-server 192.168.23.8
logging host 172.25.25.12
router ospf 1
 auto-cost reference-bandwidth 10000
interface GigabitEthernet 0/0
 ip address {{g0/0addr}} {{g0/0mask}}    #2
 ip ospf 1 area 0
interface GigabitEthernet 0/1
 ip address {{g0/1addr}} {{g0/1mask}}    #3
 ip ospf 1 area 0
 ip helper-address 10.0.0.63

This template uses variables for hostname and interface addressing while retaining shared routing, NTP, DNS, logging, and OSPF configuration. section 25.2

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes
Defines templates, variables, generated configurations, and conformity checks without detailing a specific management-tool implementation.
Examples
Uses similar-router configurations, Cisco-style interface templates, and R1-specific YAML variable values.
What you can do after
Apply reusable configurations and diagnose deviations from centrally defined device standards.
How it connects
Connects configuration management tools with variables, centralized servers, configuration drift, and desired state.

Related concepts

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 2 Advanced Networking and Security. The section links point to the parts of the book it draws on.