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| Section | Weight | Objectives |
|---|---|---|
| MPLS Technologies | 19% | - MPLS VPN basics - MPLS LDP and TE |
| Advanced IGP Features | 17% | - OSPF advanced capabilities - IS-IS advanced optimisations |
| Advanced BGP Features | 10% | - BGP policy controls - Route reflector and attributes |
| Advanced Ethernet Technologies | 10% | - MAC/security features - VLAN and Ethernet enhancements |
| Network O&M | 7% | - Monitoring and health metrics - Operation & maintenance best practices |
| Network Cutover | 7% | - Rollback procedures - Migration planning techniques |
| IPv6 Routing | 20% | - IPv6 static and dynamic routing - OSPFv3/IS-IS for IPv6 |
| Troubleshooting | 10% | - Network diagnostics - Issue resolution strategies |
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NEW QUESTION # 219
In the network shown in the figure, R1, R2, R4, and R5 run IS-IS, and the area number is
49.0001. R3 and R6 run IS-IS, and the area number is 49.0002. Within AS 65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, of which R2 and R5 are RRs, and R1, R4, R3, and R6 are clients. IBGP neighbor relationships are all established using the Loopback0 interface. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.X.X, where X is the device number. R1 and R4 introduce the external network 192.168.1.0/24 into BGP through the import method, and R3 and R6 introduce the external network 192.168.2.0/24 into BGP through the import method.
Which of the following descriptions are correct by default? (Multiple choice)
Answer: A,B,C,D
NEW QUESTION # 220
On the IS-IS IPv6 network shown in the figure, multi-topology is enabled on all routers. The ipv6 default-route-advertise always level-1 command is configured in the IS-IS process of R4.
Which of the following routers does not have the default route in its routing table?
Answer: B
NEW QUESTION # 221
When creating an IPv6 static route, for a point-to-point interface, the outbound interface must be specified. For a broadcast type interface, the next hop must be specified.
Answer: B
NEW QUESTION # 222
On the OSPFv3 network shown in the figure, area 1 is a common area. R2 generates an Inter-Area-Prefix- LSA to describe the routes of a network segment in the area. Such an LSA exists in both area 0 and area 1.
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine whether the statement is true or false, we need to analyze the OSPFv3 topology, the role of area types, and the behavior of Inter-Area-Prefix-LSAs. Let's break it down step by step:
* Understanding the OSPFv3 Topology and Area Types :
* The figure shows three routers (R1, R2, and R3) connected in an OSPFv3 network. R1 and R2 are in Area 0 (the backbone area), while R2 and R3 are in Area 1 (a common area, also known as a standard or regular area).
* R2 is an Area Border Router (ABR) because it connects Area 0 and Area 1. ABRs are responsible for summarizing and advertising routes between areas.
* What is a Common Area in OSPFv3? :
* A " common area " in OSPFv3 refers to a standard or regular OSPF area, as opposed to special areas like Stub, Totally Stubby, Not-So-Stubby Area (NSSA), or Totally NSSA. Common areas allow all types of LSAs, including inter-area, intra-area, and external LSAs, to be flooded within the area, except for restrictions in special area types.
* Since Area 1 is described as a " common area, " it behaves like a standard OSPF area, allowing the full exchange of LSAs, including Inter-Area-Prefix-LSAs.
* Role of Inter-Area-Prefix-LSA (Type 3 LSA in OSPFv3) :
* Inter-Area-Prefix-LSAs (Type 3 LSAs in OSPFv3) are used by ABRs to advertise prefixes from one area to another. These LSAs are critical for inter-area routing, allowing routers in one area to learn about networks in other areas.
* In this case, R2, as an ABR, generates Inter-Area-Prefix-LSAs to describe routes (network segments) in Area 1 and advertises them into Area 0. Conversely, R2 also receives Inter-Area- Prefix-LSAs from Area 0 (via R1) and advertises them into Area 1.
* Does the Inter-Area-Prefix-LSA Exist in Both Area 0 and Area 1? :
* Yes, Inter-Area-Prefix-LSAs exist in both areas because R2, as an ABR, floods these LSAs into both Area 0 and Area 1. Specifically:
* R2 generates Inter-Area-Prefix-LSAs for network segments in Area 1 and advertises them into Area 0, where R1 (in Area 0) can receive and process them.
* Similarly, R2 receives Inter-Area-Prefix-LSAs for network segments in Area 0 (from R1) and advertises them into Area 1, where R3 (in Area 1) can receive and process them.
* Since Area 1 is a common area (not a stub or NSSA), it allows Inter-Area-Prefix-LSAs to be flooded within the area, ensuring that routers like R3 can learn about routes in Area 0, and routers like R1 can learn about routes in Area 1.
* Verifying the Statement :
* The statement claims that R2 generates an Inter-Area-Prefix-LSA to describe the routes of a network segment in Area 1, and such an LSA exists in both Area 0 and Area 1. This is accurate because:
* R2, as an ABR, generates Inter-Area-Prefix-LSAs for Area 1's network segments and floods them into Area 0.
* R2 also receives and floods Inter-Area-Prefix-LSAs from Area 0 into Area 1.
* Therefore, Inter-Area-Prefix-LSAs describing routes in Area 1 exist in both Area 0 and Area 1, making the statement true.
* Conclusion :
* The statement is true because Inter-Area-Prefix-LSAs generated by R2 for Area 1's network segments are flooded into both Area 0 and Area 1, and Area 1, being a common area, allows these LSAs to exist within it.
References to HCIP-Datacom-Advanced Routing & Switching Technology Documents :
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Section on OSPFv3: OSPF Area Types, Inter-Area Routing, and LSA Types (specifically Inter-Area-Prefix-LSA, Type 3 LSA).
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Chapter on OSPF Routing Protocols: ABR Behavior, Common Areas, and LSA Flooding Mechanisms.
NEW QUESTION # 223
The router ID of R4 is 10.0.4.4. The LSA shown in the figure is displayed in the LSDB of R4.
Which of the following statements are true about the LSA?
Answer: A,C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the LSA Table in the Figure
The LSDB (Link-State Database) of R4 displays an Intra-Area-Prefix-LSA for Area 0.0.0.1. The table contains:
* Three LSAs originating from R4 (10.0.4.4)
* Prefixes referencing both Router-LSAs and Network-LSAs
* Different Sequence Numbers and Checksums, indicating multiple link-state changes OSPFv3 LSA Types Relevant to the Question
* Router-LSA (Type 1)
* Generated by every router to describe its links within an area.
* Network-LSA (Type 2)
* Generated only by the Designated Router (DR) for multi-access networks (such as Ethernet).
* Advertises all routers connected to the same segment.
* Intra-Area-Prefix-LSA (Type 9)
* Advertises IPv6 prefixes associated with a Router-LSA (Type 1) or Network-LSA (Type 2).
Analysis of Each Statement
A). The three LSAs belong to area 1. # (True)
* The table explicitly shows " Intra-Area-Prefix-LSA (Area 0.0.0.1) " , meaning all LSAs are for Area 1.
* The Link State IDs also indicate intra-area advertisements.
# Statement A is correct.
B). Area 1 is a stub area. # (False)
* There is no indication that Area 1 is a stub area.
* Stub areas do not receive Type 5 (External) LSAs, and the LSDB does not show Type 3 (Inter-Area) LSAs either.
* Network-LSAs (Type 2) are not typically seen in stub areas unless explicitly configured.
# Statement B is incorrect.
C). No OSPFv3 neighbor relationship is established on at least one link of R4. # (True)
* One LSA references a Router-LSA, while two reference Network-LSAs.
* A Router-LSA alone suggests that R4 has at least one point-to-point or unnumbered link with no OSPFv3 adjacency.
* This means R4 has an interface with no neighbor (e.g., a passive interface or down link).
# Statement C is correct.
D). R4 is the DR on a link. # (True)
* The presence of Network-LSAs (Type 2) indicates that a multi-access link exists.
* Since R4 is the origin of the Network-LSA, it must be the DR (Designated Router) for that link.
# Statement D is correct.
Final Conclusion:
# A. The three LSAs belong to area 1. (True)
# B. Area 1 is a stub area. (False)
# C. No OSPFv3 neighbor relationship is established on at least one link of R4. (True)
# D. R4 is the DR on a link. (True)
Thus, the correct answers are: A, C, D.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPFv3 LSA Types and DR/BDR Election Huawei Official HCIP-Datacom Study Guide - OSPFv3 Neighbor States and Link Types Huawei Documentation on OSPFv3 LSAs and Stub Area Configurations
NEW QUESTION # 224
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