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Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q71-Q76):
NEW QUESTION # 71
The link state value information between different ISIS processes of multiple routers is considered to be isolated.
Answer: B
NEW QUESTION # 72
As shown in the figure, R1, R2, R3, and R4 are in the same PLs domain, and LDP is used to distribute IPLS labels between devices.
R4 is the Egress LSR of the FEC 4.4.4.0/24. If you want to achieve R1 access 4.4.4.0/24, R4 does not need to query the label table but can know the forwarding priority of the data, then the outgoing label of R3 for the FEC should be:____. (Please fill in the Arabic numerals directly, without symbols)
Answer:
Explanation:
(0)
NEW QUESTION # 73
On the enterprise network shown in the figure, R3 is connected to the NMS, and all devices on the network communicate with the NMS through a VPN.
During an inspection, it is found that R3 has redundant RTs (Route Targets).
Which of the following commands can be run on R3 to delete the redundant RTs without affecting the connectivity between all devices and the NMS?
Options:
Answer: B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding VPN Route Targets (RTs) in MPLS VPNs
* Route Targets (RTs) define which VPN routes should be imported and exported among PE routers.
* Import-extcommunity: Specifies which VPN routes should be accepted into a VRF.
* Export-extcommunity: Specifies which VPN routes should be advertised from a VRF.
* Correctly configuring RTs ensures proper route exchange between VPN sites.
2. Analyzing the RTs in the Diagram
R3's Current Configuration:
plaintext
CopyEdit
vpn-target 3:1 export-extcommunity
vpn-target 3:2 export-extcommunity
vpn-target 1:3 export-extcommunity
vpn-target 1:3 import-extcommunity
vpn-target 3:1 import-extcommunity
vpn-target 3:2 import-extcommunity
R1's Configuration:
plaintext
CopyEdit
vpn-target 1:3 export-extcommunity
vpn-target 3:1 import-extcommunity
R2's Configuration:
plaintext
CopyEdit
vpn-target 2:3 export-extcommunity
vpn-target 3:2 import-extcommunity
* R3 has redundant RTs because it both exports and imports unnecessary RTs.
* We need to remove only redundant RTs without affecting NMS connectivity.
3. Evaluating Each Answer Choice
A: "undo vpn-target 3:1 import-extcommunity" (# Incorrect)
* R1 exports RT 1:3, and R3 imports it as 3:1.
* Removing 3:1 import-extcommunity would block R3 from receiving routes from R1, disrupting connectivity to NMS.
* Thus, this option is incorrect.
B: "undo vpn-target 1:3 export-extcommunity" (# Correct)
* R3 exports RT 1:3, but there is no need for R3 to advertise routes with 1:3.
* R1 already exports 1:3, and R3 only needs to import it.
* Removing vpn-target 1:3 export-extcommunity does not affect connectivity but eliminates redundancy.
* # This is a correct choice.
C: "undo vpn-target 1:3 import-extcommunity" (# Incorrect)
* R3 needs to import 1:3 to receive routes from R1 (which is required for NMS communication).
* If removed, R3 will not receive necessary routes, breaking connectivity.
* Thus, this option is incorrect.
D: "undo vpn-target 2:3 export-extcommunity" (# Correct)
* R2 exports RT 2:3, but R3 does not need to receive it.
* This RT is redundant and can be removed without affecting connectivity.
* # This is a correct choice.
4. Evaluating the Answer Choices
Option
Correct?
Reasoning
A
# Incorrect
R3 must import 3:1 from R1 to maintain connectivity.
B
# Correct
Removing export-extcommunity 1:3 eliminates redundancy without affecting connectivity.
C
# Incorrect
Removing import-extcommunity 1:3 would block R3 from receiving necessary routes.
D
# Correct
Removing export-extcommunity 2:3 eliminates redundancy without affecting connectivity.
# Correct answer: B and D.
Final Conclusion:
* Route Targets (RTs) are used in MPLS VPNs to control route import/export policies.
* R3 has redundant RTs, and removing unnecessary exports (1:3 and 2:3) optimizes configuration.
* Correct commands to remove redundancy without affecting connectivity are:
* # undo vpn-target 1:3 export-extcommunity
* # undo vpn-target 2:3 export-extcommunity
* Thus, the correct answer is: B and D.
NEW QUESTION # 74
OSPFV2 is an IGP running on an IPv4 network; OSPFV3 is an IGPo running on an IPv6 network. The basic working mechanism of OSPFv3 is the same as that of OSPFV2, such as the election of DR and B, DR. As shown in the figure, an engineer uses 3 routers to test IPv6 services. He wants to realize the interconnection of IPv6 networks by running OSPFV3.
Pass. Which of the following statements about the election of the network DR is correct?
Answer: C
NEW QUESTION # 75
On the OSPFv3 network shown in the figure, OSPFv3 parameters use default values. The LSDB is checked on one of the devices. The router IDs of R1, R3, and R4 are 10.0.1.1, 10.0.3.3, and 10.0.4.4, respectively. The Origin Router part of some LSAs is hidden. Complete this part. (Tokens can be reused.)
Answer:
Explanation:
NEW QUESTION # 76
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