Topic 1 Question 202
A company has a data center in the us-west-1 Region with a 10 Gbps AWS Direct Connect dedicated connection to a Direct Connect gateway. There are two private VIFs from the same data center location in us-west-1 that are attached to the same Direct Connect gateway.
VIF 1 advertises 172.16.0.0/16 with an AS_PATH attribute value of 65000. VIF 2 advertises 172.16.1.0/24 with an AS PATH attribute value of 65000 65000 65000.
How will AWS route traffic to the data center for traffic that has a destination address within the 172.16.1.0/24 network range?
AWS will route all traffic by using VIF 1.
AWS will route all traffic by using VIF 2.
AWS will use both VIFs for routing by using a round-robin policy.
AWS will use flow control to balance the traffic between the two VIFs.
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- 正解だと思う選択肢: B
AWS will route traffic to the data center for addresses within the 172.16.1.0/24 network range using VIF 2 because it provides a more specific route, despite having a longer AS_PATH.
Therefore, the correct answer is: B. AWS will route all traffic by using VIF 2.
👍 5Akshay04032024/07/23 - 正解だと思う選択肢: B
B. AWS will route all traffic by using VIF 2.
In AWS Direct Connect, traffic is routed based on the most specific route. In this scenario, there are two VIFs advertising routes for different portions of the 172.16.0.0/16 network:
VIF 1 advertises the 172.16.0.0/16 network. VIF 2 advertises the more specific subnet 172.16.1.0/24 within the 172.16.0.0/16 network. Since VIF 2 advertises a more specific route (172.16.1.0/24), AWS will prefer this route for traffic destined for the 172.16.1.0/24 network. Therefore, the correct answer is:
👍 3strike3test2024/06/10 B, most specific prefix wins!
👍 2AXH2024/06/07
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