H12-831_V1.0-ENU aktueller Test, Test VCE-Dumps für HCIP-Datacom-Advanced Routing & Switching Technology V1.0

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Huawei H12-831_V1.0-ENU Exam Syllabus Topics:

Section	Weight	Objectives
IPv6 Routing	20%	- BGP4+ and IPv6 route deployment - IPv6 addressing and transition technologies - OSPFv3 and IS-IS for IPv6
Network O&M	7%	- Network monitoring and management tools - Performance optimization and capacity planning
Network Cutover and Migration	7%	- Migration strategies and risk control - Service switchover and verification
Advanced BGP Features	10%	- Route reflectors and confederations - BGP path control and filtering - BGP route attributes and policies
Network Troubleshooting	10%	- Troubleshooting routing and switching issues - Fault diagnosis and analysis methods
Advanced IGP Features	17%	- IS-IS advanced features and convergence - OSPF advanced features and optimization - IGP route selection and control
Advanced Ethernet Technologies	10%	- VLAN stacking and QinQ - Ethernet OAM and protection mechanisms - Advanced link aggregation and reliability
MPLS Technologies	19%	- MPLS basics and label distribution - MPLS protection and fast reroute - MPLS VPN and traffic engineering

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Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 H12-831_V1.0-ENU Prüfungsfragen mit Lösungen (Q231-Q236):

231. Frage
There is the concept of forwarding equivalence class FEC in MPLS, which of the following description is wrong? (Multiple choice)

A. MPLS classifies packets with the same forwarding processing method into one category, which is called FEC
B. The division of FEC is very flexible. It can be based on any combination of source address, address, source port, destination port, protocol type or VPN, etc.
C. A forwarding equivalence FEC will be assigned a unique label value on all routers
D. The packets of the same FEC will be treated differently in the MPLS network

Antwort: C,D

232. Frage
Run the display ip interface GEO/D/D command to view statistics about ping packets received on the interface.

A. False
B. True

Antwort: B

233. Frage
On the IS-IS IPv6 network shown in the figure, multi-topology is enabled on all routers. The IPv6 address of Loopback0 on R4 is 2000::/128. The IPv6 summary 2000::/64 level-1-2 command is configured in the IS-IS processes of R2 and R1. Which of the following statements is false?

A. The routing table of R3 contains the route 2000::/128.
B. The routing table of R2 contains the route 2000::/64.
C. The routing table of R2 contains the route 2000::/128.
D. The routing table of R1 contains the route 2000::/64.

Antwort: A

Begründung:
Comprehensive and Detailed In-Depth Explanation:
To determine which statement is false, we need to analyze the IS-IS topology, the role of multi-topology, the IPv6 summary configuration, and the level-1-2 behavior of IS-IS routers. Let's break it down step by step:
* Understanding the IS-IS Topology and Levels :
* IS-IS supports multiple levels: Level-1 (L1) for intra-area routing, Level-2 (L2) for inter-area routing, and Level-1-2 (L1-2) routers that can operate in both levels and connect L1 and L2 areas.
* In the figure, R1 and R2 are configured as Level-1-2 routers, R3 is a Level-1-2 router, R4 is a Level-1 router, and R5 is a Level-1 router. The area borders are indicated by the system IDs (49.0001 for R4's area and 49.0002 for R3 and R5's area).
* R4's Loopback0 has the IPv6 address 2000::/128, which is a host route (a /128 prefix, representing a single address).
* Multi-Topology IS-IS for IPv6 :
* Multi-topology IS-IS allows separate topologies for IPv4 and IPv6, ensuring that IPv6 routes are handled independently. Since multi-topology is enabled on all routers, IPv6 routes (like 2000::
/128 on R4) are advertised and processed within the IPv6 topology.
* This means that IPv6 routes, including the Loopback0 address of R4 (2000::/128), can be advertised across the IS-IS domain, subject to the level and summary configurations.
* IPv6 Summary Configuration (2000::/64 level-1-2) :
* The command ipv6 summary 2000::/64 level-1-2 is configured in the IS-IS processes of R1 and R2. This command instructs R1 and R2 (as Level-1-2 routers) to summarize the IPv6 prefix
2000::/64 and advertise it to both Level-1 and Level-2 areas.
* Summarization means that instead of advertising the more specific route (e.g., 2000::/128 from R4), R1 and R2 advertise the less specific summary route 2000::/64. This summary route covers the 2000::/128 address of R4's Loopback0.
* Since R1 and R2 are Level-1-2 routers, they can advertise this summary to both their Level-1 neighbors (like R4 and R3) and Level-2 neighbors (across areas).
* Analyzing Each Statement :
* A. The routing table of R1 contains the route 2000::/64.
* True. R1 is a Level-1-2 router with the ipv6 summary 2000::/64 level-1-2 command configured. It advertises and installs the summary route 2000::/64 in its routing table, covering the more specific 2000::/128 from R4. Additionally, as a Level-1-2 router, R1 can learn and retain this route from its IS-IS neighbors.
* B. The routing table of R2 contains the route 2000::/64.
* True. Similar to R1, R2 is also a Level-1-2 router with the same summary command. It advertises and installs the 2000::/64 summary route in its routing table, covering R4's
2000::/128.
* C. The routing table of R3 contains the route 2000::/128.
* False. R3 is a Level-1-2 router in area 49.0002, but it receives routes from R2 (a Level-1-2 router in area 49.0001). Because R1 and R2 are configured with the ipv6 summary 2000::
/64 level-1-2 command, they advertise the summary route 2000::/64 to their neighbors, including R3. IS-IS prefers the most specific route, but the summary configuration ensures that the more specific 2000::/128 from R4 is not advertised beyond R1 and R2 unless explicitly allowed. Since R3 is in a different area and receives the summary 2000::/64 from R2, it does not have the more specific 2000::/128 route in its routing table. Therefore, this statement is false.
* D. The routing table of R2 contains the route 2000::/128.
* True. R2, as a Level-1-2 router, is directly connected to R4 (a Level-1 router) via the IS-IS topology. R4 advertises its Loopback0 address 2000::/128 to R2. Even though R2 is configured to summarize 2000::/64, it can still retain the more specific 2000::/128 route in its routing table because IS-IS allows routers to keep both summary and more specific routes, with the more specific route taking precedence for routing decisions.
* Conclusion :
* The false statement is C, as R3 does not contain the route 2000::/128 in its routing table. Instead, R3 receives the summary route 2000::/64 from R2 due to the summary configuration on R1 and R2.
References to HCIP-Datacom-Advanced Routing & Switching Technology Documents :
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Section on IS-IS: Multi-Topology IS-IS for IPv6, Level-1 and Level-2 Operations, and Route Summarization.
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Chapter on IPv6 Routing Protocols:
IS-IS Configuration and Behavior, Including Summary Address Commands and L1/L2 Interactions.

234. Frage
As shown in the figure:

A. The System ID of R3 and R1 are duplicated
B. R3 and R1 have different area codes
C. The IIH certification of R3 and R1 failed
D. IS-Leve1 of R3 and R1 do not match

Antwort: A

235. Frage
In BGP/MPLS IP VPN, the OSPF multi-instance process uses the DN bit to prevent Type5 LSA loops.

A. TRUE
B. FALSE

Antwort: B

236. Frage
......

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