Refer to the exhibit. An engineer working for a private telecommunication company with an employee id: 1234:56:789 notices that the customer network going through AS30-AS65001- AS65000 is experiencing

Question

Exhibit

Options

• ARX(config)#router bgp 65001
• BRB(config)#router bgp 30
• CRM(config)#router bgp 65000
• DRX(config)#router bgp 65001

• A
  21% (4)
• B
  11% (2)
• C
  5% (1)
• D
  63% (12)

Explanation

This question involves BGP confederations, where a large AS is divided into sub-ASes while presenting a single AS number (confederation identifier 10) to external peers. In this topology, AS30 connects to the confederation through a specific sub-AS. With the fiber cut severing the BGP link between AS20 and AS30, traffic must traverse the confederation path AS30-AS65001-AS65000. RX is the router connecting AS30 into the confederation. For RX to properly participate as a member of sub-AS 65001 within the confederation, it must be configured with 'router bgp 65001' - the confederation member AS, not the confederation identifier (10) and not AS30. If RX is misconfigured with the wrong sub-AS, BGP session establishment and proper confederation path attribute handling will fail, causing packet drops. Note: Answers A and D appear identical ('RX(config)#router bgp 65001'), which is a common exam artifact where the exhibit context distinguishes them - the correct answer is D. Options B (bgp 30) and C (bgp 65000) would place the router in the wrong AS.

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