max speed of stak cable

[Andrey128]

when we stack two switches ( e.g. C9300) what is max speed of such stack cable?

The idea is: will the speed of stack cable bigger than ~20 Gb/s which could be achieved by etherchannel of two 10Gb/s ports.

[jj27 · Accepted solution]

The StackWise cables provide 320 Gbps (fixed uplink models) or 480 Gbps (modular uplink models) on the backplane.

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9300-series-switches/nb-06-cat9300-ser-data-sheet-cte-en.html#Platformdetails

So yes, if you are trying to achieve switch to switch communications using the stacking ports will be faster and more efficient than connecting them together with an etherchannel.