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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network O&M | 7% | - Routine maintenance - Data collection |
| Topic 2: Advanced BGP Features | 10% | - BGP route control - Inter-domain routing optimization - Route reflectors - Advanced BGP features |
| Topic 3: Advanced Ethernet Technologies | 10% | - Ethernet security - VLANs |
| Topic 4: Network Troubleshooting | 10% | - Structured troubleshooting processes - Troubleshooting methods |
| Topic 5: Network Cutover | 7% | - Basic cutover concepts - Migration process |
| Topic 6: Advanced IGP Features | 17% | - Fast convergence - IS-IS advanced features - Route control - OSPF advanced features |
| Topic 7: MPLS Technologies | 19% | - MPLS VPN applications - MPLS forwarding - MPLS configuration - MPLS principles |
| Topic 8: IPv6 Routing | 20% | - IS-IS for IPv6 - BGP4+ - IPv6 static routes - OSPFv3 |
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NEW QUESTION # 101
On the OSPFv3 network shown in the figure, OSPFv3 is enabled on the interfaces connecting R1, R2, and R3. The router ID of each router is 10.0.X.X, where X is the number of the router. If you check detailed information about an LSA on R3, the command output shows that the LSA is generated by R2 and describes the IPv6 prefix address associated with the Router-LSA.
Answer: B
NEW QUESTION # 102
On the network shown in the figure, EBGP peer relationships are established between neighboring routers through directly connected interfaces.
* The router ID of each router is 10.0.X.X, and the AS number is 6500X, where X is the number of the router.
* Both R1 and R4 have static routes to 192.168.1.0/24, which are imported to BGP through the import- route command.
Which of the following statements are true?
Answer: A,B,C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the BGP Network Topology in the Question:
* EBGP Peering
* Each router forms EBGP peer relationships with directly connected neighbors.
* This is a fully meshed topology, meaning each router exchanges BGP routes with its adjacent routers.
* Routing Information for 192.168.1.0/24
* R1 and R4 import the static route 192.168.1.0/24 into BGP.
* Since BGP prefers the shortest AS path, traffic to 192.168.1.0/24 will follow the shortest path to R1 or R4.
Route Analysis for Each Statement:
Statement A: R6 # R5 # R4 # (Correct)
* R6 does not have a direct route to 192.168.1.0/24, so it must rely on BGP advertisements from its EBGP neighbors.
* R5 learns the route to 192.168.1.0/24 from R4.
* Therefore, R6 forwards traffic to R5, and then R5 sends it to R4.
# Correct path: R6 # R5 # R4
Statement B: R5 # R4 # (Correct)
* R5 is directly connected to R4, and since R4 advertises the 192.168.1.0/24 route via BGP,
* R5 will forward traffic directly to R4 as the shortest AS path.
# Correct path: R5 # R4
Statement C: R2 # R1 # (Correct)
* R2 is directly connected to R1 and learns the 192.168.1.0/24 route from R1 via BGP.
* Since R1 advertises the static route, R2 forwards traffic directly to R1.
# Correct path: R2 # R1
Statement D: R3 # R2 # R1 # (Correct)
* R3 is directly connected to R2 and learns the 192.168.1.0/24 route from R2 via BGP.
* Since R2 prefers R1 as the shortest AS path to 192.168.1.0/24,
* R3 will send traffic to R2, and R2 will send it to R1.
# Correct path: R3 # R2 # R1
Final Conclusion:
# A. The path for traffic from R6 to 192.168.1.0/24 is R6 # R5 # R4.
# B. The path for traffic from R5 to 192.168.1.0/24 is R5 # R4.
# C. The path for traffic from R2 to 192.168.1.0/24 is R2 # R1.
# D. The path for traffic from R3 to 192.168.1.0/24 is R3 # R2 # R1.
Thus, the correct answers are: A, B, C, D.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - BGP Best Path Selection and AS Path Preferences Huawei Official HCIP-Datacom Study Guide - EBGP Route Advertisement and Static Route Import into BGP Huawei Documentation on BGP Route Selection and Path Preference Mechanisms
NEW QUESTION # 103
OSPFv3 runs on R1 and R2, and the IPv6 addresses configured for the interfaces are marked in the figure.
The router IDs of R1 and R2 are 10.0.1.1 and 10.0.2.2, respectively.
Which of the following statements is true?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding Intra-Area-Prefix-LSA (Type 9) in OSPFv3
* OSPFv3 uses the Intra-Area-Prefix-LSA (Type 9) to advertise IPv6 prefixes associated with either:
* A Router-LSA (Type 1) # Describes links and interfaces.
* A Network-LSA (Type 2) # Advertises multi-access networks (if a Designated Router exists).
* Each router generates one Intra-Area-Prefix-LSA to advertise its own IPv6 prefixes.
Prefix Analysis for Each Router
R1's IPv6 Prefixes:
* 2000:12::1/64
* 2001:12::1/64
* 2002:12::1/64
* 2003:12::/64 (Shared link with R2)
* Total Prefixes in R1's Intra-Area-Prefix-LSA = 4
# R1 advertises four prefixes in its Intra-Area-Prefix-LSA.
R2's IPv6 Prefixes:
* 2003:12::2/64 (Shared link with R1)
* Total Prefixes in R2's Intra-Area-Prefix-LSA = 1
# R2 advertises only one prefix in its Intra-Area-Prefix-LSA.
Checking Each Option:
# A. The Intra-Area-Prefix-LSA generated by R2 describes three prefixes. (# False, R2 only has one prefix).
# B. The Intra-Area-Prefix-LSA generated by R1 describes four prefixes. (# True, R1 has four prefixes).
# C. The Intra-Area-Prefix-LSA generated by R2 describes four prefixes. (# False, R2 only has one prefix).
# D. The Intra-Area-Prefix-LSA generated by R1 describes three prefixes. (# False, R1 has four prefixes).
Final Conclusion:
# B. The Intra-Area-Prefix-LSA generated by R1 describes four prefixes.
Thus, the correct answer is: B. The Intra-Area-Prefix-LSA generated by R1 describes four prefixes.
NEW QUESTION # 104
On the IS-IS IPv6 network shown in the figure, if you check the LSDB on R1, the command output shows that R1 is the DIS.
Answer: B
Explanation:
To determine whether R1 is the DIS (Designated Intermediate System) in IS-IS, you analyze the LSDB (Link-State Database) output from the command:
bash
CopyEdit
display isis lsdb
In IS-IS, the DIS creates and advertises Pseudonode LSPs with the LSP ID format:
perl
CopyEdit
< system-id > . < 00-FF > . < 00 >
In the output shown:
scss
CopyEdit
0000.0000.0001.00-00* < - Normal LSP (R1)
0000.0000.0001.01-00* < - Pseudonode LSP (indicates R1 is DIS)
0000.0000.0002.00-00 < - Normal LSP (R2)
# The LSP 0000.0000.0001.01-00 * is a Pseudonode LSP , and it belongs to R1 (0000.0000.0001). This LSP is only generated by the DIS on a broadcast network segment.
# The presence of the Pseudonode LSP for R1 confirms that:
* R1 is acting as the DIS .
* The asterisk (*) next to the LSPs also means R1 owns them and they are local to R1 .
# Final answer: A. TRUE
Official Huawei Extract:
" In IS-IS, the DIS is responsible for generating a Pseudonode LSP on broadcast networks. The LSP ID of a Pseudonode ends with .01-00. The presence of this LSP in the LSDB confirms that the router is acting as the DIS. "
- [Huawei HCIA-Datacom Certification Guide - IS-IS Chapter: DIS and LSP Types]
NEW QUESTION # 105
The interface address of an OSPFv3 router is 2000::1/128. In which of the following types of LSAs is this prefix likely to appear? (Multiple choice)
Answer: A,D
NEW QUESTION # 106
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