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Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q412-Q417):

NEW QUESTION # 412
On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. The import-route isis level-2 into level-1 command is configured on R2 and R5. In AS 65000, R1, R3, R4, and R6 each establish iBGP peer relationships with R2 and R5. R2 and R5 are RR (Route Reflectors), and R1, R4, R3, and R6 are the iBGP peer relationship clients. The iBGP peer relationship ID is 10.0.0.X/32, where X is the number of the iBGP router. R1 and R4 import the external route 192.168.1.0/24 to BGP through the import-route command, and R3 and R6 import the external route
192.168.2.0/24 to BGP through the import-route command. Which of the following statements are true?

A. The routing table of R1 contains the route 192.168.2.0/24.
B. The routing table of R1 contains two equal-cost default routes.
C. The routing table of R4 contains two equal-cost default routes.
D. The route 192.168.2.0/24 in the routing table of R4 has two different outbound interfaces.

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:This question involves a complex network topology with IS-IS, iBGP, and route reflection, requiring an understanding of routing protocols, area boundaries, and route distribution. Let's analyze each statement step-by-step to determine which is true, based on HCIP-Datacom principles.
Network Overview:
* IS-IS Configuration:
* IS-IS runs on R1, R2, R4, and R5 in area 49.0001 (Level-1/Level-2).
* IS-IS runs on R3 and R6 in area 49.0002 (Level-2 only, as implied by the figure).
* The import-route isis level-2 into level-1 command on R2 and R5 allows Level-2 routes (from area 49.0002) to be injected into Level-1 routers (R1, R4) in area 49.0001.
* BGP Configuration:
* AS 65000 uses iBGP with R2 and R5 as Route Reflectors (RRs), and R1, R3, R4, and R6 as clients.
* iBGP peer relationships use IP addresses 10.0.0.X/32, where X is the router number (e.g., R1 =
10.0.0.1/32, R4 = 10.0.0.4/32, etc.).
* R1 and R4 import the external route 192.168.1.0/24 into BGP using import-route.
* R3 and R6 import the external route 192.168.2.0/24 into BGP using import-route.
* Topology Insights:
* The figure shows R2 and R5 as central hubs connecting Level-1/Level-2 IS-IS areas and serving as RRs for iBGP.
* R1 and R4 are in area 49.0001 (Level-1/Level-2), while R3 and R6 are in area 49.0002 (Level-2).
* External routes (192.168.1.0/24 and 192.168.2.0/24) are injected into BGP and distributed via iBGP.
Analyzing Each Statement:
A: The routing table of R4 contains two equal-cost default routes.
* Analysis:
* In IS-IS, default routes (0.0.0.0/0) are typically generated by Level-2 routers and propagated to Level-1 routers if configured (e.g., via default-route-advertise).
* R4 is a Level-1/Level-2 router in area 49.0001. It can learn default routes from R2 or R5 (Level-2 routers) if they advertise a default route.
* However, the question does not indicate that R2 or R5 are configured to advertise default routes, nor does it specify equal-cost paths to a default route.
* Given the import-route isis level-2 into level-1 on R2 and R5, Level-2 routes (including defaults, if any) are injected into Level-1, but there's no evidence of two equal-cost default routes in R4's routing table.
* Additionally, IS-IS prefers the closest Level-2 router for default routes, and the topology suggests a single path (e.g., via R2 or R5), not two equal-cost paths.
* Conclusion: This statement is false.
B: The route 192.168.2.0/24 in the routing table of R4 has two different outbound interfaces.
* Analysis:
* The route 192.168.2.0/24 is an external route imported into BGP by R3 and R6 (in area 49.0002) using import-route.
* As RRs, R2 and R5 reflect this route to their iBGP clients, including R4 (in area 49.0001).
* However, iBGP routes do not modify the next-hop by default unless next-hop-self is configured on the RR. The next-hop for 192.168.2.0/24 from R3/R6 would typically point to R3 or R6, not R2 or R5, unless modified.
* R4, as an iBGP client, receives the route but needs an IGP (IS-IS) path to the next-hop (R3 or R6).
* The import-route isis level-2 into level-1 on R2 and R5 allows R4 to learn IS-IS routes from area
49.0002, but the question does not indicate multiple equal-cost paths to R3 or R6 from R4.
* In IS-IS, unless explicitly configured for equal-cost multipath (ECMP) with the same cost to R3 and R6, R4 would use a single outbound interface to reach 192.168.2.0/24.
* The topology suggests a single path (e.g., via R2 or R5) to area 49.0002, not two equal-cost outbound interfaces.
* Conclusion: This statement is false.
C: The routing table of R1 contains two equal-cost default routes.
* Analysis:
* Similar to R4, R1 is a Level-1/Level-2 router in area 49.0001. It can learn default routes from R2 or R5 if they advertise them.
* The question does not specify that R2 or R5 are configured to advertise default routes, nor does it indicate multiple equal-cost paths to a default route.
* IS-IS prefers the closest Level-2 router for default routes, and the topology (with R2 and R5 as central hubs) suggests a single path, not two equal-cost paths.
* Without evidence of ECMP or specific default route configuration, R1 would not have two equal- cost default routes.
* Conclusion: This statement is false.
D: The routing table of R1 contains the route 192.168.2.0/24.
* Analysis:
* The route 192.168.2.0/24 is an external route imported into BGP by R3 and R6 (in area 49.0002) using import-route.
* R2 and R5, as Route Reflectors, reflect this iBGP route to their clients, including R1 (in area
49.0001).
* iBGP ensures that the route is propagated within AS 65000, so R1, as an iBGP client of R2 and R5, will receive the 192.168.2.0/24 route.
* For R1 to install this route in its routing table, it needs a valid IGP (IS-IS) path to the next-hop of the BGP route (likely R3 or R6).
* The import-route isis level-2 into level-1 on R2 and R5 ensures that IS-IS Level-2 routes from area 49.0002 (including paths to R3 and R6) are injected into Level-1 routers like R1.
* Therefore, R1 can resolve the next-hop for 192.168.2.0/24 via IS-IS and install the route in its routing table.
* Conclusion: This statement is true.
Final Answer and Rationale:
The only true statement is D, as R1, being an iBGP client of R2 and R5, will receive and install the
192.168.2.0/24 route in its routing table, with IS-IS providing the necessary path to the next-hop.
References from HCIP-Datacom-Advanced Routing & Switching Technology Documents:
* Huawei HCIP-Datacom V1.0 Training Manual, Chapter 4: IS-IS Configuration and Optimization, Sections on Level-1/Level-2 Interactions and Route Import.
* Huawei HCIP-Datacom V1.0 Training Manual, Chapter 5: BGP Configuration and Optimization, Sections on Route Reflection and iBGP Route Distribution.
* RFC 1195 (IS-IS) and RFC 4271 (BGP-4) for standard protocol behavior.

NEW QUESTION # 413
The IS-IS Level-1 neighbor relationship between R3 and R4 is not established. According to the information in this figure_What is the possible reason?

A. R3andR4the interconnect interfacecircuit-typeMismatch
B. R3andR4ofIS-LevelMismatch
C. R3andR1ofIIHAuthentication failed
D. R3andR4different area codes

Answer: D

NEW QUESTION # 414
As shown in the figure, on the R1 router, network administrator A sends the routing entry to R2 through the routing policy After modifying the Local Preference value, you can control the path of traffic leaving the AS100

A. wrong
B. Correct

Answer: A

NEW QUESTION # 415
ULA aggregation can be implemented within a physical network by isolating broadcast domains with multiple Sub-LANs and aggregating these Sub-LANs into a logical Super-LAN.
Which of the following descriptions about WAN combinations is correct?

A. If different Sub-VLANs belong to the same Super-VLAN, the hosts in these Sub- VLANs can directly communicate at Layer 2
B. When configuring VLAN aggregation, you can configure VLAN1 as a Super-VLAN
C. If the core switch creates a Super-LAN and the corresponding VLANIF interface, then as long as there is a physical interface in the core switch that is Up, the ANIF interface status will be Up.
D. If Proxy ARP is enabled on the VLANIF interface to which the Super-VLAN belongs, all Sub- VLANs can establish corresponding ARP entries for intercommunication.

Answer: D

NEW QUESTION # 416
In the hub-spoke networking shown in the figure, the Hub-PE can be configured to allow repetitive local AS numbers for correct route transmission.

Is this statement TRUE or FALSE?

A. TRUE
B. FALSE

Answer: A

NEW QUESTION # 417
......

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