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Cisco 644-906 Exam : Implementing and Maintaining Cisco Technologies Using IOS XR

644-906 actual test
  • Exam Code: 644-906
  • Exam Name: Implementing and Maintaining Cisco Technologies Using IOS XR
  • Updated: Jun 02, 2026
  • Q & A: 77 Questions and Answers
  • PDF Demo
  • PC Test Engine
  • Online Test Engine
  • Total Price: $59.99  

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Understanding functional and technical aspects of Control Plane (644-906 SPAUTO)

The following will be asked from you in the CISCO 644-906 exam dumps:

  • Configure a simple pass_all policy for those eBGP neighbors
  • Modify interface counter load interval
  • Compare to regular show command
  • Configure Multicast NSF
  • Configure additional interfaces to be part of non-backbone area
  • Execute a show bgp command using a route-policy to modify the output.
  • Enable RSVP on interfaces
  • Configuring exec timeout
  • Configure eBGP neighbors for IPv4 routing
  • Configure one iBGP peer to support 6PE type functionality by adding addressfamily IPv6 labeled-unicast
  • Display a specific entry and explain AS path and next-hop information
  • Re-sequence an ACL
  • Configuring local logging device/archiving
  • Add two VRFs into BGP and redistribute static routes into BGP for VPNv4
  • Securing vty line and vty access
  • Display the peer summary status for IPv4 and IPv6
  • Configure static routes for IPv4 unicast in the global table
  • Configure interfaces to be part of the backbone area
  • Configure MoFRR
  • Enable ISIS for IPv4 unicast routing
  • Verify vty access-group configuration
  • Determine the status of the routing adjacencies
  • Enable some but not all of the IPv4 enabled interfaces for IPv6 routing
  • Configure the ISIS NET
  • Configure router to run LDP
  • Configure Multicast VPN
  • Display the IPv4 BGP table
  • Create a route policy that adds a community where the community is used as a parameter when the policy is called
  • Configure P2MP-TE for IP Multicast
  • Display OSPF database and determine which links are present
  • Enable ISIS for IPv6 unicast routing
  • Configure one iBGP neighbor as an IPv6-only neighbor with IPv6 peer addresses
  • Troubleshoot packet drops
  • Display the topologies for IPv4 and IPv6. Why are they different?
  • Configuring terminals for logging display (term mon)
  • Understand and monitor interface counters
  • Modify an existing applied ACL
  • Configure interfaces for ISIS routing
  • Create a route policy that checks for an AS from the AS-set and adds a community for matching routes
  • Monitor ACL counters
  • Add VPNv4 capability to one iBGP peer
  • Monitoring logging buffer and filtering messages
  • Configure PIM-SM, PIM-SSM, PIM-SSM range
  • Verify AAA permissions upon command failure (i.e., debug aaa)
  • Configure OSPF to support traffic engineering extensions
  • Configuring AAA command accounting
  • Display the IPv4 unicast route table
  • Configure non-default metric on some interfaces
  • Configure an autonomous system number for BGP to use
  • Define an AS-set for use in RPL
  • Create a route-policy that uses an inline prefix-set and changes the local preference when a match is found
  • Configuring line templates, vty pools
  • Determine status of neighbors
  • Configuring logging facility
  • Clear interface counters
  • Configure iBGP neighbors with the typical configuration to use loopback addresses for peering
  • Configuring syslog server host as logging destination
  • Describe the difference in processing of transit packets versus locally destined packets
  • Configure neighbor logging so adjacency changes can be monitored
  • Configuring AAA authentication - using TACACS+ and local as fallback
  • Determine status if interfaces are configured for ISIS
  • Apply ACLs in debug commands
  • Enable LDP on interfaces
  • Configure BGP to support IPv4 routing
  • Determine status of OSPF interfaces
  • Implementing TACACS+ - assigning tasks groups and privileges
  • Understand the information stored in a forwarding table entry
  • Configure BGP to support IPv6 routing
  • Configuring logging buffer
  • Turn and debugging for ISIS adjacencies and explain the information shown
  • Use neighbor-groups for identical configuration sections on multiple peers
  • Execute show command to verify status of LDP neighbors
  • Configure static routes in for IPv4 unicast in two different VRFs
  • Verify that communities are added as expected
  • Configure MSDP for interconnecting PIM-SM domains
  • Configure router to log neighbor events
  • Implement ACLs to filter traffic on an interface
  • Configure one iBGP neighbor to exchange both IPv4 and IPv6 prefixes over an IPv4 session
  • Determine how much memory the BGP process uses Configure RPL
  • Understand the flow of packets through a router
  • Configure static-RP, Auto-RP and BSR for PIM-SM
  • Configuring AAA command authorization - Using TACACS+ and local as fallback

How to Prepare For Implementing and Maintaining Cisco Technologies Using IOS XR (IMTXR)

Preparation Guide for Implementing and Maintaining Cisco Technologies Using IOS XR (IMTXR)

Introduction

This exam tests a candidate's knowledge of implementing, verification testing, and maintaining Cisco core and edge technologies, using the IOS XR based router platforms, which include the CRS, ASR 9000, and the XR12000 routers. The Implementing and Maintaining Cisco Technologies using IOS XR (IMTXR) (646-906) exam is the exam associated with the IOS XR Specialist certification. A 90-minute exam with 65‒75 questions, the exam tests a candidate's knowledge of implementing, verification testing, and maintaining Cisco core and edge technologies, using the IOS XR based router platforms, which include the CRS, ASR 9000, and the XR12000 routers. CISCO 644-906 practice exams and CISCO 644-906 practice test will help to understand and memorize the concepts and detailed answers and solutions.

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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:

  • How to find a blocked process
  • How to use Show LPTS commands
  • Deactivate PIEs or SMUs
  • How to check processes like state, number of restarts, job id, pid, tid
  • Debug commands with ACL filtering
  • Show policer values and drop counts in LPTS
  • Base assumption of EEM knowledge - understand what is possible/not possible
  • Committing the configuration (show config fail)
  • Understanding types of packages (Mini.PIE)
  • Assigning user privilege to root-system
  • Understand P versus PX images and the hardware they support
  • How to look at the memory utilization on the line card
  • Using source flag
  • Understand what is LPTS
  • Understanding types of packages (optional PIEs)
  • Understand about LPTS policer
  • Using the parser with pipe, include, exclude, begin, regex
  • Understand differences between owner and non-owner SDR in access to admin plane and exec plane
  • Understand what configuration is in the admin plane
  • Understand what is target config
  • Assigning user privilege to cisco-support
  • Understand when a syntax check is done
  • With activate flag
  • Check how much memory a process is using
  • How to look at the memory utilization on the route processor
  • Initial or recovery software installation (ROMMON variables)
  • Check how much CPU a process is using
  • How to use Show Tech Support commands
  • Understand what is active config
  • Understand between admin user versus exec username
  • Understand IOS-XR versioning and installation restrictions
  • Show where certain processes are running
  • Understand protected memory space versus shared memory and which area uses it
  • Committing the installation path
  • Check which packages are active
  • Understand the default VRF
  • Check which packages are committed
  • Committing the configuration (replacing the configuration)
  • Loading configuration
  • Understanding types of packages (SMUs)
  • Initial or recovery software installation (Turboboot Mini.VM file)
  • Show configuration history
  • Understand what configuration is in the exec plane
  • Check installation log
  • Activate PIEs or SMUs
  • Committing the configuration (using the commit confirm feature)
  • Assigning user privilege to root-lr
  • Configure interfaces before the physical interface is available)
  • Committing the configuration (with labels and comments)
  • Going back to a previous configuration
  • Locate core files and moving them to a server
  • Remove inactive packages, PIEs, or SMUs
  • Showing configuration IDs and labels
  • See what install requests are currently active
  • Understanding how task-based authorization work
  • How to perform process restart
  • Using TFTP, FTP, USB thumb drive, and hard drive as the source
  • Understanding security certificate in PIEs and SMUs
  • Core file configuration location including hard drive and FTP
  • Understanding types of packages (Mini.VM)
  • Using TAR file
  • Committing the configuration (atomic versus best effort)
  • Understand when a semantic check is done

Reference: http://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/specialist-imtxr.html

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