Cisco 642-887 : Implementing Cisco Service Provider Next-Generation Core Network Services

  • Exam Code: 642-887
  • Exam Name: Implementing Cisco Service Provider Next-Generation Core Network Services
  • Updated: May 30, 2026
  • Q & A: 231 Questions and Answers

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Reference: http://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/642-887-spcore.html

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Cisco 642-887 Exam Topics:

SectionWeightObjectives
QOS in a Service Provider IP NGN Environment38%1 Describe the DiffServ and IntServ QoS models

2 Describe the QoS mechanisms (classification and marking, congestion management and avoidance, traffic policing and shaping)

3 Describe IPv6 Flow Label

4 Describe trust boundaries in enterprise and SP environments

5 Describe Cisco MQC for QoS configurations

6 Describe hierarchical QoS configurations

7 Describe the Cisco NBAR feature for discovering network protocols and for packets classifications

8 Describe the typical Edge PE routers and Core P routers QoS requirements

9 Implement classification and marking in an inter-domain network using QPPB on Cisco IOS-XR and IOS-XE

10 Implement class-based markings on Cisco IOS-XR and IOS-XE

11 Implement QoS pre-classify on tunnel interface on Cisco IOS-XR and IOS-XE

12 Implement CB-WFQ on Cisco IOS-XR and IOS-XE

13 Implement LLQ on Cisco IOS-XR and IOS-XE

14 Implement WRED on Cisco IOS-XR and IOS-XE

15 Implement traffic policing on Cisco IOS-XR and IOS-XE

16 Implement traffic shaping on Cisco IOS-XR and IOS-XE

17 Describe LPTS and hardware rate limiters on Cisco IOS-XR routers

18 Describe MPLS EXP bits

19 Describe MPLS QoS implementation concepts and models

20 Implement MPLS DiffServ tunneling on Cisco IOS-XR and IOS-XE

21 Troubleshoot QoS IOS-XR and IOS-XE configuration errors
MPLS/LDP in a Service Provider IP NGN Environment22%1 Describe MPLS traffic engineering (TE) concepts

2 Describe MPLS TE constraint-based path computations

3 Describe the details of MPLS TE tunnels, including path setup procedures and path maintenance

4 Describe methods of assigning traffic into MPLS TE tunnels

5 Implement MPLS TE tunnels on Cisco IOS-XR and IOS-XE

6 Implement MPLS TE bandwidth control on Cisco IOS-XR and IOS-XE

7 Implement MPLS TE link and node protections on Cisco IOS-XR and IOS-XE
MPLS/LDP in a Service Provider IP NGN Environment32%1 Describe the CEF, FIB, LFIB and LIB tables on Cisco routers

2 Describe MPLS labels and label stack operations on Cisco routers

3 Describe LDP operations in Cisco routers

4 Describe MPLS OAM (MPLS LSP ping and MPLS traceroute)

5 Describe MPLS applications in service provider environment

6 Implement LDP on Cisco IOS-XR and IOS-XE

7 Implement LDP high availability features on Cisco IOS-XR and IOS-XE

8 Troubleshoot LDP on IOS-XR and IOS-XE configuration errors
Transport Technologies8%1 Describe the SP core transition from ATM/SONET/SDH based backbone to
packet based IP/MPLS backbone

2 Implement 10/40/100 Gigabit Ethernet Interfaces on Cisco IOS-XR routers

3 Describe DWDM, IPoDWDM and ROADM

4 Implement IPoDWDM controller/interface on Cisco IOS-XR routers

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