Entering OSPF Area View in Huawei VRP
Short answer
AD Use 'area 0' or 'area 0.0.0.0' in OSPF process view to enter Area 0 configuration context.
Question
Key Takeaways
The main trap is confusing the system view with the OSPF process view; you must be in the OSPF process view before issuing any 'area' commands.
Learn how to enter OSPF Area 0 view in Huawei devices using VRP commands. Both decimal (0) and dotted-decimal (0.0.0.0) area IDs are accepted within the OSPF process view.
Common mistake: Choosing option B is a common mistake because users forget that OSPF commands must be executed within the specific OSPF process view, not the global system view.
Expert Analysis
The question asks for the specific Virtual Routing and Forwarding (VRP) commands that enter the OSPF area view, specifically for Area 0. To answer this correctly, we must understand Huawei's hierarchical CLI structure and OSPF configuration syntax.
OSPF Process View Requirement
In Huawei VRP, OSPF configuration is performed within the context of an OSPF process. The user must first enter the OSPF process view using a command like ospf [process-id]. Commands related to areas cannot be executed from the system view ([Huawei]). Option B ([Huawei]ospf area 0) is incorrect because it attempts to define an area directly from the system view without specifying a process ID or entering the correct view mode.
Area ID Syntax in VRP
Once inside the OSPF process view (e.g., [Huawei-ospf-1]), the command to enter a specific area view is area <area-id>. Huawei VRP supports two formats for the Area ID:
- Decimal Format: A simple integer (e.g.,
0). This corresponds to Option A ([Huawei-ospf-1] area 0), which is valid. - Dotted Decimal Format: An IP-address-like format (e.g.,
0.0.0.0). This corresponds to Option D ([Huawei-ospf-1] area 0.0.0.0), which is also valid and functionally equivalent to Area 0.
Invalid Commands
Option C ([Huawei-ospf-1] area 0 enable) is incorrect because there is no enable keyword associated with the area command in standard OSPF configuration views. The area command simply switches the context to that area's configuration scope; it does not require an enable flag.
Therefore, both A and D are correct ways to enter Area 0 view from the OSPF process context.
Exam Strategy
Always check the CLI prompt prefix (e.g., [Huawei-ospf-1]) to determine the current configuration context. For multi-select questions on configuration commands, verify if multiple valid syntax variations exist for the same logical operation, such as using both decimal and dotted-decimal formats for identifiers.
Frequently Asked Questions
Can I use 'ospf area 0' from the system view?
Are 'area 0' and 'area 0.0.0.0' different?
Discussion 4 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 4
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e9b92a4 👍 1Correct answers: A and D A. [Huawei-ospf-1] area 0 — Valid: from OSPF process view, enters area 0. D. [Huawei-ospf-1] area 0.0.0.0 — Valid: Huawei VRP accepts the dotted-decimal area ID (0.0.0.0) as equivalent to area 0. Why the others are incorrect: B. [Huawei] ospf area 0 — From system view you must first enter OSPF process view (e.g., ospf 1), then run area 0. You can’t jump directly with ospf area 0. C. [Huawei-ospf-1] area 0 enable — There is no enable keyword for area configuration in VRP.
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Fmoura17 👍 1A and D are correct. In VRP, you must first be in OSPF process view, then use either: area 0 (decimal) area 0.0.0.0 (dotted decimal) Both formats are valid to enter area 0 view. B — Can't enter area view directly from system view. C — area 0 enable is not a valid VRP command.
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ButcherCapybara 👍 1A and D. There is no "Area 0 enable" command
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Heidorn 👍 1AD, Area 0 Enable is not the syntax
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