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| Section | Weight | Objectives |
|---|---|---|
| Network Cutover | 7% | - Implementation and rollback strategy - Cutover planning and risk assessment - Post-cutover validation - Pre-cutover verification |
| IPv6 Routing | 20% | - OSPFv3 and IS-IS for IPv6 - Transition mechanisms (dual-stack, tunnel, translation) - IPv6 address planning and configuration - BGP4+ for IPv6 |
| Network Troubleshooting | 10% | - Routing protocol fault diagnosis - Structured troubleshooting methodology - Performance and service fault resolution - Switching and link fault handling |
| Advanced Ethernet Technologies | 10% | - Port isolation and security features - QinQ and VLAN mapping - Ethernet link aggregation and reliability - VLAN aggregation and MUX VLAN |
| MPLS Technologies | 19% | - MPLS VPN (L3VPN, L2VPN) - MPLS OAM and protection - MPLS fundamentals and label distribution - LDP and RSVP-TE protocols |
| Advanced IGP Features | 17% | - IS-IS advanced features
|
| Advanced BGP Features | 10% | - Routing policies and filtering - Route reflectors and confederations - BGP route selection and attributes - BGP multi-homing and load balancing |
| Network O&M | 7% | - Configuration management and backup - Routine maintenance procedures - Network monitoring and performance analysis - Log and alarm management |
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NEW QUESTION # 95
A network engineer deletes the IP address of an interface by mistake using a command. To view the deleted IP address, which of the following information should be queried?
Answer: D
Explanation:
Huawei network devices provide several information-management mechanisms, including logs, traps, debugging information, and SNMP management data.
Log information is the appropriate starting point when investigating a configuration change made by an administrator.
Depending on the device software version and enabled logging functions, configuration-operation logs may record commands executed by administrators, including IP address modifications and deletions.
The administrator can examine available logs using commands such as display logbuffer or investigate saved log files.
SNMP agent information primarily provides information used by management systems. Trap messages normally report significant events or state changes, while debugging information provides detailed protocol or system diagnostics.
Neither traps nor debugging output is the primary source for reconstructing an accidental configuration change.
Therefore, option C is correct. Recovering the exact deleted address depends on whether the relevant configuration-operation records were retained.
NEW QUESTION # 96
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?
Answer: A
Explanation:
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.
NEW QUESTION # 97
In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. Configure
"ipv6 default-route-advertise always level-1" in the R4 IS-IS process.
By default, which of the following routers has no default route in its routing table?
Answer: D
NEW QUESTION # 98
When an IP packet passes through an MPLS network, an MPLS device processes the TTL value in the packet.
If the pipe mode is used in the topology shown in the figure, which of the following is the TTL value in the IP packet?
Answer: B
NEW QUESTION # 99
After a fault occurs, you need to collect and back up various types of fault information in time as a reference for troubleshooting. In addition, when seeking emergency assistance from Huawei Technologies Co., Ltd.
Answer: B
NEW QUESTION # 100
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