Hi Aldo,
It is the model types that have to be the same.
As the book says:-
"Supervisor Engines
The VSS requires Supervisor Engine 720 with 10-Gigabit Ethernet ports. You must use either two VS-S720-10G-3C or two VS-S720-10G-3CXL supervisor engine modules."
Say your VSS had beenup and running for a couple of years then a SUPY went
faulty.
The chances are that when you receive a new card the H/W versionis very likely to be newer.
Just make sure the model of SUPY are exactly the same.
Regards
Alex
Regards,
Alex.
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