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Updated: Jul 31, 2026
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Understanding functional and technical aspects of Operating System (644-906 SPAUTO)
The following will be asked from you in the CISCO 644-906 exam dumps:
- Activate PIEs or SMUs
- Base assumption of EEM knowledge - understand what is possible/not possible
- Initial or recovery software installation (ROMMON variables)
- Assigning user privilege to cisco-support
- Understand about LPTS policer
- How to find a blocked process
- How to check processes like state, number of restarts, job id, pid, tid
- Understand IOS-XR versioning and installation restrictions
- With activate flag
- Understanding types of packages (Mini.PIE)
- Understand P versus PX images and the hardware they support
- Committing the configuration (with labels and comments)
- Check which packages are committed
- Understand what is LPTS
- Committing the installation path
- Understand what is active config
- Understanding types of packages (Mini.VM)
- Loading configuration
- Deactivate PIEs or SMUs
- Understand between admin user versus exec username
- Committing the configuration (using the commit confirm feature)
- Using TFTP, FTP, USB thumb drive, and hard drive as the source
- Show configuration history
- Using the parser with pipe, include, exclude, begin, regex
- How to perform process restart
- Initial or recovery software installation (Turboboot Mini.VM file)
- Using TAR file
- Assigning user privilege to root-lr
- Locate core files and moving them to a server
- Debug commands with ACL filtering
- How to use Show Tech Support commands
- Understand protected memory space versus shared memory and which area uses it
- Remove inactive packages, PIEs, or SMUs
- Check installation log
- Committing the configuration (atomic versus best effort)
- Understand when a semantic check is done
- Committing the configuration (replacing the configuration)
- How to use Show LPTS commands
- Understanding how task-based authorization work
- Check how much memory a process is using
- Understand what is target config
- Understand what configuration is in the admin plane
- Understanding types of packages (optional PIEs)
- Check how much CPU a process is using
- See what install requests are currently active
- Understand differences between owner and non-owner SDR in access to admin plane and exec plane
- Core file configuration location including hard drive and FTP
- Check which packages are active
- How to look at the memory utilization on the line card
- Understanding types of packages (SMUs)
- Assigning user privilege to root-system
- Understand when a syntax check is done
- Configure interfaces before the physical interface is available)
- Understand what configuration is in the exec plane
- How to look at the memory utilization on the route processor
- Using source flag
- Showing configuration IDs and labels
- Understand the default VRF
- Committing the configuration (show config fail)
- Show where certain processes are running
- Understanding security certificate in PIEs and SMUs
- Show policer values and drop counts in LPTS
- Going back to a previous configuration
Cisco 644-906 Exam Overview:
| Certification Vendor: | Cisco |
| Exam Name: | Implementing and Maintaining Cisco Technologies Using IOS XR |
| Exam Number: | 644-906 |
| Available Languages: | English |
| Exam Format: | Lab Exam, Practical Simulation |
| Related Certifications: | CCIE Service Provider |
| Sample Questions: | Cisco 644-906 Sample Questions |
| Exam Way: | Hands-on lab exam conducted in a proctored environment |
| Pre Condition: | Strong knowledge of Cisco Service Provider networking concepts and CCIE Service Provider track-level expertise is recommended. |
Understanding functional and technical aspects of Network Device Programmability Cisco Service Provider Solutions (644-906 SPAUTO)
The following will be asked from you in the CISCO 644-906 exam dumps:
- Construct a Python script using RESTCONF with JSON
- Diagnose model-driven dial-in/-out telemetry streams with gRPC for a Cisco IOS XR
- Construct a Python script using NETCONF with YDK
- Compare gNMI with NETCONF
- Deploy device configuration and validate operational state using Ansible playbooks
- Construct Xpath notation for a given node or instance of a node
- Deploy device configuration and validate operational state using ncclient
- Deploy device configuration and validate operational state using NetMiko
How much Implementing and Maintaining Cisco Technologies Using IOS XR (IMTXR) costs
- Passing Score: 300 or higher
- Length of Exam: 75 min
- Examination Name: Implementing and Maintaining Cisco Technologies Using IOS XR (IMTXR)
- No of Questions: 55 Questions
- Examination Fees: $200 USD
- Types of questions: Performance Based Questions
Cisco 644-906 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| MPLS and VPN Services | - L3VPN implementation - MPLS label switching fundamentals - Traffic engineering concepts |
| Routing Protocols | - IS-IS implementation - BGP configuration and policy control - OSPF configuration and optimization |
| IOS XR Architecture and Platform Fundamentals | - Process management and control/data plane separation - IOS XR system architecture overview - Device boot process and file system |
| Multicast | - PIM sparse mode configuration - Multicast routing in service provider networks |
| Quality of Service (QoS) | - Congestion management and avoidance - QoS models and architecture - Traffic classification and marking |
| Infrastructure Services | - Logging and troubleshooting tools - System management and monitoring |
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