Which IGPs are supported by LDP autoconfiguration?
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Correct answer: OSPF and IS-IS.
Why this is the answer
LDP autoconfiguration simplifies MPLS LDP deployment by automatically enabling LDP on interfaces that are part of a supported Interior Gateway Protocol (IGP) process. The IGPs that LDP autoconfiguration supports are OSPF and IS-IS. This feature is designed to work with robust, link-state routing protocols that provide a complete topology view, which is essential for MPLS label distribution. RIPv2 and EIGRP are not supported by LDP autoconfiguration. RIPv2 is a distance-vector protocol and lacks the necessary features for efficient MPLS integration. While EIGRP is an advanced distance-vector protocol, it is not included in the LDP autoconfiguration specification.
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