Multiple BGP Processes on a Single Router
Short answer
B Multiple BGP processes can be configured on the same router, provided each process uses a unique Autonomous System (AS) number.
Question
Key Takeaways
The trap lies in confusing the uniqueness of an AS number per instance with the limitation of having only one BGP process total. Multiple processes are allowed if they use distinct AS numbers.
This H12-821 exam question tests whether multiple BGP processes can coexist on one router. The correct answer is FALSE because routers can run multiple BGP instances with different AS numbers.
Common mistake: Choosing TRUE based on the misconception that a router must act as a single BGP speaker for a single AS. In reality, multi-AS configurations are standard practice.
Expert Analysis
The statement is FALSE. A single router can indeed run multiple BGP processes, each identified by a unique Autonomous System (AS) number. This configuration is common in scenarios such as route reflection, multihoming to different providers with distinct ASNs, or when acting as a border gateway for multiple autonomous systems.
While the comment suggests that "BGP is designed to represent a single Autonomous System (AS) per physical device," this is an oversimplification. A router is a BGP speaker for each AS it originates or peers within. The key distinction is that while you cannot have two BGP instances with the same AS number running simultaneously on the same router (as they would conflict), you can absolutely configure separate BGP processes for different AS numbers (e.g., AS 65001 and AS 65002). Therefore, the absolute prohibition stated in the question is incorrect.
Exam Strategy
When evaluating BGP capabilities, always check for constraints on resource limits or specific protocol behaviors rather than assuming hard architectural prohibitions. For Huawei devices, verify documentation on 'multiple BGP processes' support, which typically allows them for complex routing policies or multihoming scenarios.
Frequently Asked Questions
Can I run two BGP processes with the same AS number on one router?
Why would someone configure multiple BGP processes on a single router?
Community Votes
100% of anonymous learners picked answer A. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 1 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 1
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Adi_1 👍 2 Answered ABGP is designed to represent a single Autonomous System (AS) per physical device. A router is logically identified as a single BGP speaker within that AS.
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