Answer: • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7100 • On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7300 • On the Direct Connect BGP peer to us-east-1, set the local preference value to 200 • On the Direct Connect BGP peer to af-south-1, set the local preference value to 50

To ensure that af-south-1 is used as a secondary link to AWS, the network engineer should configure BGP in such a way that the us-east-1 link is preferred over the af-south-1 link. This can be achieved by setting a higher local preference value for the us-east-1 link compared to the af-south-1 link. The local preference is a BGP attribute that influences the path selection process, with higher values being preferred. Additionally, AWS uses specific BGP community tags to influence route advertisement and selection. The community tag 7224:7100 is used to advertise routes to all AWS Regions, while 7224:7300 is used to advertise routes to a specific AWS Region. Therefore, to make us-east-1 the primary link, it should be configured with community tag 7224:7100 and a higher local preference value (e.g., 200). Conversely, the af-south-1 link should be configured with community tag 7224:7300 and a lower local preference value (e.g., 50) to ensure it acts as a secondary link.

Author: LeetQuiz Editorial Team