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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: MPLS Technologies | 19% | - MPLS VPN basics - MPLS LDP and TE |
| Topic 2: Advanced IGP Features | 17% | - IS-IS advanced optimisations - OSPF advanced capabilities |
| Topic 3: Troubleshooting | 10% | - Network diagnostics - Issue resolution strategies |
| Topic 4: Advanced Ethernet Technologies | 10% | - VLAN and Ethernet enhancements - MAC/security features |
| Topic 5: Network O&M | 7% | - Operation & maintenance best practices - Monitoring and health metrics |
| Topic 6: IPv6 Routing | 20% | - IPv6 static and dynamic routing - OSPFv3/IS-IS for IPv6 |
| Topic 7: Network Cutover | 7% | - Rollback procedures - Migration planning techniques |
| Topic 8: Advanced BGP Features | 10% | - BGP policy controls - Route reflector and attributes |
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質問 # 63
What is the default aging time of the MAC address table of Huawei switches in seconds?
正解：B
質問 # 64
Service routes of an enterprise are transmitted on the network. Some configurations of PE1 and PE2 are shown in the figure. Which of the following LSAs may CE2 receive?
正解：A、B
質問 # 65
Entries in a MAC address table are classified into dynamic, static, and blackhole entries. In addition, the MAC address table of a switch also contains service MAC address entries, which are typically converted from dynamic entries.
正解：B
解説：
Huawei classifies the principal MAC address-table entries as dynamic, static and blackhole entries:
* Dynamic entries are learned automatically from the source MAC addresses of received frames and are subject to aging.
* Static entries are manually configured, do not age and remain after a saved configuration is restarted.
* Blackhole entries are manually configured to discard frames sourced from or destined for specified MAC addresses.
Service modules can further classify or convert dynamically learned entries according to a particular service.
Huawei examples include secure MAC, authentication MAC, guest MAC and MUX MAC entries. These are collectively referred to as service MAC address entries. Their forwarding and aging behavior is controlled by the feature that created or converted them-for example, port security, access authentication or MUX VLAN.
Therefore, the statement is correct: in addition to the three fundamental MAC-entry classes, a switch may contain service-specific MAC entries that are generally derived from or further classifications of dynamically learned entries. Huawei MAC address-entry classification
質問 # 66
On the IS-IS network shown in the figure, R1 imports a default route using the default-route-advertise always level-1 command. Which of the following statements is false?
正解：D
解説：
Comprehensive and Detailed In-Depth Explanation:
Understanding the IS-IS Topology in the Question:
* R1 (Level-1 Router) is connected to R2 (Level-1-2 Router).
* R2 connects Level-1 and Level-2 areas, making it an inter-area router.
* R3 (Level-2 Router) connects to R2.
* The loopback addresses are:
* R1: 10.0.1.1/32
* R2: 10.0.2.2/32
* R3: 10.0.3.3/32
Key Command Used: default-route-advertise always level-1
* This command forces R1 to advertise a default route (0.0.0.0/0) to Level-1 routers.
* Level-1 routers (like R1) do not have visibility into Level-2 routes unless a default route is provided by an L1-L2 router (R2 in this case).
Analyzing Each Option:
* Option A (TRUE):
* If R1 pings an unknown address like 10.0.4.4, it will use the default route if available.
However, if no such route exists, it will not send any packets.
* This behavior is expected, so this statement is true.
* Option B (TRUE):
* 10.0.2.2 (R2) is a Level-1-2 router, and it can communicate with 10.0.3.3 (R3), which is a Level-2 router.
* Since R2 and R3 are both in Level-2, they can exchange routes.
* So, 10.0.2.2 can ping 10.0.3.3. This statement is true.
* Option C (TRUE):
* 10.0.1.1 (R1) is a Level-1 router, and 10.0.2.2 (R2) is a Level-1-2 router.
* Since R2 is Level-1-2, it shares Level-1 routes with R1, allowing communication between R1 (10.0.1.1) and R2 (10.0.2.2).
* Therefore, this statement is true.
* Option D (FALSE - Correct Answer):
* 10.0.1.1 (R1) is a Level-1 router, which means it only knows about Level-1 routes.
* 10.0.3.3 (R3) is a Level-2 router, and its route is only known by Level-2 routers (R2 & R3).
* Since Level-1 routers do not learn Level-2 routes directly (unless specific redistribution is done), R1 does not have a route to 10.0.3.3.
* Therefore, R1 (10.0.1.1) cannot ping R3 (10.0.3.3), making this statement false.
Conclusion:
The false statement is Option D (10.0.1.1 can ping 10.0.3.3).
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - IS-IS Route Types and Forwarding Principles Huawei Official HCIP-Datacom Study Guide - IS-IS Level-1 and Level-2 Routing Concepts Huawei Documentation on default-route-advertise always level-1 Command
質問 # 67
The default MPLS label publishing mode, label distribution control mode and label retention mode of Huawei routers are respectively
正解：C
質問 # 68
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