You are using E8GP peering in an underlay IP fabric. Which two statements are correct in this scenario? (Choose two.)

In a Clos IP fabric the underlay routing is typically provided by EBGP sessions directly between physically connected leaf and spine switches; since EBGP distributes all required reachability, no separate IGP is needed. Each leaf switch therefore establishes an EBGP session to every spine (full-mesh leaf-to-spine); leaves do not peer with one another.

A. EBGP eliminates the need for an auxiliary IGP; adjacencies are formed directly.

D. Leaf-to-leaf EBGP sessions are unnecessary; communication is relayed through the spine layer.

1. Juniper Networks Day One “Building IP Fabrics with EBGP,” Chap. 3, “Leaf/Spine Peering Model,” pp. 23-25, 2021.

2. Juniper Networks TechLibrary, “EBGP IP Clos Fabric Design,” Section ‘Underlay Routing Overview’, para. 1-2, 2022.