350-501 · Question #480
350-501 Question #480: Real Exam Question with Answer & Explanation
The correct answer is C: Implement route reflectors on all ABRs.. In a Unified MPLS architecture, using route reflectors (RRs) is a common way to reduce the full- mesh iBGP requirement. Deploying RRs on all Area Border Routers (ABRs) allows them to manage BGP routes within their respective areas or domains, avoiding the need for a full iBGP mes
Question
A service provider is in the process of implementing Unified MPLS on an enterprise network with many nodes. After the migration, several new customers will be added to the environment. RFC 3107 is used to build BGP LSPs across the domains. Which action must the networking team take to reduce the full-mesh requirement for iBGP?
Options
- AImplement a confederation with each ABR serving as a gateway between secondary AS
- BImplement a confederation with the network segmented according to business units.
- CImplement route reflectors on all ABRs.
- DImplement route reflectors on all P routers.
Explanation
In a Unified MPLS architecture, using route reflectors (RRs) is a common way to reduce the full- mesh iBGP requirement. Deploying RRs on all Area Border Routers (ABRs) allows them to manage BGP routes within their respective areas or domains, avoiding the need for a full iBGP mesh between all routers. RFC 3107, which defines carrying label information in BGP, complements this setup by enabling labeled BGP LSPs across the domains efficiently. By implementing route reflectors on ABRs, scalability is improved, and management complexity is
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