The civic NOC must confirm a leaf installs multipath next hops toward all spines for its fabric prefixes. What monitoring check best verifies underlay ECMP?
Select an answer to reveal the explanation.
Short Explanation
ECMP is only real when the leaf’s map shows several equal-cost doors to the spines—not when you pinged one door and hoped. Look at the installed multipath next hops for those fabric prefixes.
Full Explanation
Verifying underlay ECMP requires checking that routing and forwarding tables install multiple equal-cost paths toward spine next hops for relevant prefixes (such as leaf loopbacks). A single management ping, ARP clears on access VLANs, or NTP comparisons do not prove multipath installation in the fabric underlay.