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ADD-PATH vs MULTIPATH — Very Important Difference

FeatureADD-PATHMultipath
PurposeAllow RR to send multiple pathsAllow router to install multiple paths
Where it worksBetween BGP peersInside router’s RIB/FIB
Required for ECMP?Yes, in iBGP with RRYes, for actual load balancing
When usedEVPN fabrics, iBGPAll BGP deployments

Key idea:

ADD-PATH allows multiple paths to be advertised.
Multipath allows multiple paths to be installed.

You usually enable BOTH in EVPN/VXLAN.

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