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| Section | Weight | Objectives |
|---|---|---|
| Advanced Ethernet Technologies | 10% | - MAC/security features - VLAN and Ethernet enhancements |
| MPLS Technologies | 19% | - MPLS LDP and TE - MPLS VPN basics |
| IPv6 Routing | 20% | - OSPFv3/IS-IS for IPv6 - IPv6 static and dynamic routing |
| Troubleshooting | 10% | - Network diagnostics - Issue resolution strategies |
| Advanced IGP Features | 17% | - IS-IS advanced optimisations - OSPF advanced capabilities |
| Network Cutover | 7% | - Rollback procedures - Migration planning techniques |
| Advanced BGP Features | 10% | - BGP policy controls - Route reflector and attributes |
| Network O&M | 7% | - Operation & maintenance best practices - Monitoring and health metrics |
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102. Frage
On the OSPFv3 network shown in the figure:
* Area 1 is a stub area, Area 2 is a common area, and Area 3 is an NSSA (Not-So-Stubby Area).
* The IPv6 address of Loopback0 on R6 is 2000::6/128.
* The router ID of each router is 10.0.X.X, where X is the router number.
* The stub no-summary command is configured in Area 1 on R2.
Which of the following statements is true?
Antwort: A
Begründung:
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPFv3 Areas and Routing Behavior
* OSPFv3 Area Types in the Network:
* Area 1 (Stub Area): Does not accept external LSAs (Type 5) but can receive Inter-Area-Prefix- LSAs (Type 3).
* Area 2 (Common Area): Fully functional area that allows both Type 3 (Inter-Area) and Type 5 (External) LSAs.
* Area 3 (NSSA - Not-So-Stubby Area): Does not accept Type 5 (External) LSAs but allows ASBRs to inject external routes using Type 7 LSAs, which are later converted to Type 5 in other areas.
* Effect of stub no-summary Command on Area 1 (Configured on R2):
* This command prevents Type 3 LSAs from entering Area 1, meaning R4 will not learn about
2000::6/128 from other areas.
* R4 only has a default route (::/0) provided by R2 but not individual routes like 2000::6/128.
Route and Packet Flow Analysis
A: "The LSDB of R4 contains the Inter-Area-Prefix-LSA that is generated by R1 and describes 2000::6
/128." # (False)
* R4 is in Area 1 (a totally stub area), which does not receive Type 3 LSAs.
* Since 2000::6/128 is an external route from Area 2, it will not be present in R4's LSDB.
* Thus, R4 does NOT have the Inter-Area-Prefix-LSA for 2000::6/128.
# Statement A is incorrect.
B: "The path for data packets from R4 to 2000::6 is R4 -> R1 -> R5 -> R3 -> R6." # (False)
* R4 is in a totally stub area (Area 1), and it does not have a specific route for 2000::6/128.
* It only has a default route (::/0) pointing to R2.
* If R4 forwards traffic, it will send it to R2, NOT via R1, R5, and R3.
# Statement B is incorrect.
C: "The routing table of R4 does not contain the route 2000::6/128." # (True - Correct Answer)
* R4 is in a totally stub area (Area 1), meaning it only receives a default route from R2 (::/0).
* It does NOT receive specific routes like 2000::6/128.
# Statement C is correct.
D: "The path for data packets from R4 to 2000::6 is R4 -> R2 -> R6." # (False)
* While R4 does forward all unknown traffic to R2 (due to the default route), R2 will NOT directly forward to R6.
* R2 is an ABR (Area Border Router), and the actual path to 2000::6 must traverse Area 2, likely through other routers.
# Statement D is incorrect.
Final Conclusion:
# C. The routing table of R4 does not contain the route 2000::6/128.
Thus, the correct answer is: C. The routing table of R4 does not contain the route 2000::6/128.
103. Frage
MPLS has the concept of FEC forwarding equivalence class, so FEC cannot be allocated based on which of the following standards?
Antwort: D
104. Frage
Network administrator A wants to use AS-Path Filter to match the BGP routing attribute AS_PATH[100200300]. Network administrator A sorts out the four configurations in the figure. Which of the following configurations can meet the requirements of network administrator A?
Antwort: A,B
105. Frage
On the network shown in the figure, the DHCP server function is enabled on GE0/0/0 of R2 , and the address pool is an interface address pool .
When GE0/0/0 and GE0/0/1 of R1 function as DHCP clients , only one interface can obtain an IP address by default .
Options:
Antwort: B
Begründung:
Comprehensive and Detailed In-Depth Explanation:
Understanding the DHCP Process in This Scenario:
* DHCP Server on R2:
* The DHCP server is configured on interface GE0/0/0 of R2 .
* The address pool is an interface address pool , meaning that IP addresses are allocated from the subnet of GE0/0/0 (i.e., 10.0.12.0/24 ).
* DHCP Clients on R1:
* Both interfaces (GE0/0/0 and GE0/0/1) on R1 are set as DHCP clients , meaning they will send DHCP DISCOVER messages to obtain an IP address dynamically .
* Why Only One Interface Gets an IP Address?
* Interface address pools in Huawei devices assign only one IP address per MAC address (which is typically the router's MAC).
* Since both interfaces belong to R1 , they share the same MAC address when making a DHCP request.
* As a result, the DHCP server on R2 only assigns one IP address to the first requesting interface .
* The second request is ignored or denied by the DHCP server due to the duplicate MAC address issue .
Key Takeaways:
* Huawei routers using an interface-based DHCP address pool assign only one IP per MAC address.
* Since both interfaces on R1 have the same MAC, only one gets an IP.
* This behavior is expected in Huawei's HCIP-Datacom-certified DHCP configurations.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* Huawei HCIP-Datacom Official Certification Guide , Chapter on DHCP Server and Client Configurations .
* Huawei Datacom Configuration Guide , Section on Interface Address Pools and Address Assignment Limitations .
* Huawei Enterprise Networking Training Materials , DHCP Relay and DHCP Server Behavior.
106. Frage
Please match 0SPFv3LSA with its transmission range.
Antwort: A
Begründung:
AS-external-LSA Autonomous system-wide intra-regional propagation
Network-1SA intra-regional spread
107. Frage
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