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H12-821_V1.0 · Question #664

Which of the following descriptions about the Originator_ID attribute in BGP is correct? (Multiple choice) A. Originator_ID is a recognized arbitrary attribute. B. If there are multiple RRs in an…

The correct answer is B. If there are multiple RRs in an AS, the Originator_ID attribute is created by the first RR C. When a route is reflected by RR for the first time, RR adds the Originator_ID attribute to this route to identify the originating router of this route. See the full explanation below for the reasoning.

Question

Which of the following descriptions about the Originator_ID attribute in BGP is correct? (Multiple choice) A. Originator_ID is a recognized arbitrary attribute. B. If there are multiple RRs in an AS, the Originator_ID attribute is created by the first RR C. When a route is reflected by RR for the first time, RR adds the Originator_ID attribute to this route to identify the originating router of this route. D. If the Originator_ID attribute already exists, RRs will compare the received Originator_ID with the local RouterID. If the two IDs are the same, BGPSpeaker will ignore this route and do not process it.

Options

  • AOriginator_ID is a recognized arbitrary attribute.
  • BIf there are multiple RRs in an AS, the Originator_ID attribute is created by the first RR
  • CWhen a route is reflected by RR for the first time, RR adds the Originator_ID attribute to this route to identify the originating router of this route.
  • DIf the Originator_ID attribute already exists, RRs will compare the received Originator_ID with the local RouterID. If the two IDs are the same, BGPSpeaker will ignore this route and do not process it.

How the community answered

(38 responses)
  • A
    13% (5)
  • B
    82% (31)
  • D
    5% (2)

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