The city IBGP fabric has grown past a comfortable full mesh among leaves. Which scaling approach fits IP fabric underlay practice?
Select an answer to reveal the explanation.
Short Explanation
Full-mesh IBGP is a dinner party that does not scale—eventually you need hosts who repeat the gossip. Route reflectors (and sometimes confederations) keep the city fabric growing without every leaf peering every other leaf. Do not “solve” mesh pain with STP.
Full Explanation
Large IBGP fabrics commonly introduce route reflectors and may use confederations to reduce session mesh complexity while preserving underlay routing. Those tools address control-plane scaling, not a retreat to STP or disabling multipath. Injecting every tenant host route into the underlay increases scale pressure rather than relieving session mesh issues. Align reflector placement—often on spines—with client and policy design.