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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced IGP Features | 17% | - IS-IS advanced features and convergence - OSPF advanced features and optimization - IGP route selection and control |
| Topic 2: Advanced Ethernet Technologies | 10% | - Ethernet OAM and protection mechanisms - VLAN stacking and QinQ - Advanced link aggregation and reliability |
| Topic 3: Network Cutover and Migration | 7% | - Migration strategies and risk control - Service switchover and verification |
| Topic 4: Network O&M | 7% | - Performance optimization and capacity planning - Network monitoring and management tools |
| Topic 5: IPv6 Routing | 20% | - OSPFv3 and IS-IS for IPv6 - IPv6 addressing and transition technologies - BGP4+ and IPv6 route deployment |
| Topic 6: Advanced BGP Features | 10% | - Route reflectors and confederations - BGP path control and filtering - BGP route attributes and policies |
| Topic 7: Network Troubleshooting | 10% | - Fault diagnosis and analysis methods - Troubleshooting routing and switching issues |
| Topic 8: MPLS Technologies | 19% | - MPLS protection and fast reroute - MPLS basics and label distribution - MPLS VPN and traffic engineering |
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NEW QUESTION # 142
Service routes of an enterprise are transmitted on the network. Some configurations of PE1 and PE2 are shown in the figure. Which of the following LSAs may CE2 receive?
Answer: A,B
NEW QUESTION # 143
On the OSPF network shown in the figure:
* Area 1 is a common area .
* Area 2 is a totally NSSA (Not-So-Stubby Area) .
* Area 3 is an NSSA .
* R5 imports the external route 10.0.5.5/32 into OSPF .
Which of the following routers have the route 10.0.5.5/32 in their routing tables?
Answer: A,B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPF Areas and Route Propagation in the Network:
* OSPF Area Types in the Question:
* Area 0 (Backbone Area) : Connects all areas and distributes routing information.
* Area 1 (Standard Area) : Regular OSPF area that can receive and forward external routes.
* Area 2 (Totally NSSA - Totally Not-So-Stubby Area) :
* Does not allow external routes except for a default route injected by the ABR.
* Area 3 (NSSA - Not-So-Stubby Area) :
* Allows external routes as Type 7 LSAs but does not accept Type 5 LSAs.
* How External Routes Are Advertised in This Scenario:
* R5 (in Area 3) imports 10.0.5.5/32 as an external route into OSPF.
* Since Area 3 is an NSSA , the external route is advertised as a Type 7 LSA (not Type 5).
* The ABR (R1) converts the Type 7 LSA into a Type 5 LSA and advertises it into Area 0.
* Once in Area 0 , this Type 5 LSA can be distributed to other areas except totally stubby or totally NSSA areas .
Route Distribution Analysis:
* R5 (Area 3) # R1 (Area 0, ABR) :
* R5 generates a Type 7 LSA for 10.0.5.5/32 .
* R1 (ABR) converts this Type 7 LSA into a Type 5 LSA and injects it into Area 0 .
* R2 (Area 0) # R3 (Area 0) :
* Since Area 0 allows external Type 5 LSAs , R2 and R3 receive 10.0.5.5/32 . # R2 and R3 have the route.
* R6 (Area 1) # Connected to Area 0 :
* Area 1 is a common area , meaning it can receive external Type 5 LSAs. # R6 has the route.
* R4 (Area 2 - Totally NSSA) :
* Totally NSSA areas do NOT accept Type 5 or Type 7 LSAs .
* Instead, they receive only a default route from the ABR (R3).
* Since R4 does not receive external routes explicitly, it does NOT have 10.0.5.5/32 . # R4 does NOT have the route.
Final Conclusion:
* # R2, R3, and R6 have the route 10.0.5.5/32 .
* # R4 does not have the route because Area 2 is a Totally NSSA and only gets a default route .
Thus, the correct answer is:
# R2, R3, and R6 have the route 10.0.5.5/32 in their routing tables.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPF Route Types and Area Behavior Huawei Official HCIP-Datacom Study Guide - OSPF LSA Types and Route Filtering in NSSA & Totally NSSA Areas Huawei Documentation on Type 7 to Type 5 LSA Conversion in NSSA Areas
NEW QUESTION # 144
In a BGP/MPLS IP VPN network, when a PE device advertises VPNv4 routes, which of the following information will it carry? (Multiple choice)
Answer: A,B,D
NEW QUESTION # 145
In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a normal area, and area 3 is an NSSA area. The IPv6 address of the R6 Lopback0 interface is 2000::6/128. The Router ID of each device is 10.0.XX, where X is the device number. "stub no-summary" is configured in area 1 of R2. Which of the following descriptions is correct?
Answer: C
NEW QUESTION # 146
The routing policy tools that can be used by BGP mainly include Filterpolicy and oRoute-policy.
Fiterpolicy can only filter routes, Rote - policy can only modify routes
Answer: B
NEW QUESTION # 147
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