Cisco Stacking

[Hamada Ahmed]

Hi,

C9300 can be stacked up to 8 switches,

and I want to stack 6 Switches, is it ok? or better go with 4 Switches only?

[Mark Elsen]

  - @Hamada Ahmed           Both options are ok, there will be no performance impact ,

  M.

[tinil]

Stacking up to 8 9200/9300s is fully supported with no performance limitations. If you need the port density, stacking all 6 together is ideal, you get a single management plane and avoid managing multiple smaller stacks.

[Leo Laohoo]

When it comes to stacking/VSS, there is a saying, "Shared state, shared fate".  

None ever more true than the current stacking/VSS architecture.  Regardless whether the platform is wired or wireless (VSS), stacking/VSS gives added risks of network instability in the form of software bugs that can only be triggered when the switches (or WLC) are in a stack/VSS.  Alternatively, stacked or VSS cannot tolerate unstable NIC -- If the NIC goes down/up non-stop/constantly and without any checks, it can-and-will cause either the member switch, stack master or the entire stack to crash. 

And I speak from experience since the 3650/3850 came out until present.