When configuring a virtual interface with Direct Connect , which of the following is false when it comes to the configuration of BGP with the virtual interface.
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A. B. C. D.Answer - D.
The AWS documentation mentions the following.
A virtual interface must have a public or private Border Gateway Protocol (BGP) Autonomous System Number (ASN) for your side of the BGP session.
If you are using a public ASN, you must own it.
If you are using a private ASN, it must be in the 64512 to 65535 range.
Autonomous System (AS) prepending does not work if you use a private ASN for a public virtual interface.
You can provide your own MD5 BGP authentication key, or you can let Amazon generate one for you.
For more information on Virtual interfaces, please visit the below link:
http://docs.aws.amazon.com/directconnect/latest/UserGuide/WorkingWithVirtualInterfaces.htmlWhen configuring a virtual interface with Direct Connect, Border Gateway Protocol (BGP) is used to exchange routing information between the customer's network and the Direct Connect location. BGP is an industry-standard protocol that is used to exchange routing information between different Autonomous Systems (AS).
The statements that are true regarding the configuration of BGP with the virtual interface are:
A. If a public ASN is being used, then it must be ensured that you own the ASN: This statement is true. If a public ASN is being used, the customer must ensure that they own the ASN. This is because public ASNs are globally unique identifiers and can be used to identify and route traffic between different networks. It is recommended that the customer obtains a public ASN from a Regional Internet Registry (RIR).
B. If a private ASN is used, it must be in the 64512 to 65535 range: This statement is true. If a private ASN is being used, it must be in the 64512 to 65535 range. Private ASNs are used within an organization's network and are not globally unique identifiers.
C. A BGP session needs to have a public or private ASN number at the customer side: This statement is true. To establish a BGP session, the customer must have a public or private ASN number. The ASN is used to identify the customer's network to other networks.
D. Autonomous System (AS) prepending can work even if you use a private ASN for a public virtual interface: This statement is false. Autonomous System (AS) prepending is a technique used to influence the path selection of BGP routes. It involves adding the customer's ASN multiple times to the BGP advertisement. This makes the route less attractive to the receiving network. However, AS prepending does not work if the customer is using a private ASN for a public virtual interface. This is because private ASNs are not globally unique and are not recognized by other networks.
In summary, statements A, B, and C are true, while statement D is false.