A network administrator has set up a dual-homed BGP connection with an ISP. The administrator would like to influence the ISP router so that all traffic from the ISP enters the autonomous system through a specific entry point. Which BGP attribute can the administrator configure to achieve this?
IT Exam Items Repository › Category: CCNP ENARSI v9 › A network administrator has set up a dual-homed BGP connection with an ISP. The administrator would like to influence the ISP router so that all traffic from the ISP enters the autonomous system through a specific entry point. Which BGP attribute can the administrator configure to achieve this?
A network administrator has set up a dual-homed BGP connection with an ISP. The administrator would like to influence the ISP router so that all traffic from the ISP enters the autonomous system through a specific entry point. Which BGP attribute can the administrator configure to achieve this?
- Next-hop
- Aggregate
- MED
- Local preference
- Weight
Explanation: The Multi-Exit Discriminator (MED), also known as the BGP metric, is used to influence the path that external neighbors (such as an ISP) choose to reach a local AS when multiple entry points exist. While Local Preference and Weight influence outbound traffic selection, MED is explicitly designed to provide a "hint" to adjacent autonomous systems about the preferred entry path.
Related exam: Checkpoint Exam: Layer 3 Technologies – BGP
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