Periodically compares MTU, VLAN and teaming settings on a distributed switch with the physical switch ports it connects to, and flags differences.
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In the Ultra Transcenders books
Each book explains vSphere Distributed Switch health check in context, with comparison tables and the common traps.
Terms in this definition
- MTU
Biggest frame an interface can carry. The physical fabric needs at least 1600 bytes for NSX overlay traffic, with 1700 recommended and 9000 preferred where jumbo frames run end to end.
- VLAN
Layer 2 broadcast domain tagged using 802.1Q. In VCF they carry TEP, vSAN, vMotion and management traffic, and NSX can back segments with them.
- SWITCH
Checks one expression against several candidate values, returning whichever result pairs with the match (or a fallback otherwise). Writing SWITCH ( TRUE (), ... ) avoids nested IF chains: whichever condition is first true wins.
- Physical
Describes the concrete, real-world parts that put a logical architecture into effect.
See vSphere Distributed Switch health check in the full glossary