Official support for 9600 Quad Supervisor came in with 17.2.1 !!!
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/17-2/configuration_guide/ha/b_172_ha_9600_cg/quad_supervisor_with_route_processor_redundancy.html
Hi Carl,
Depending on the HW used, there is a set of ports that can be used as a Stackwise Virtual link. The port numbering does not need to match between switches.
Hi TT,
If the DAD link fails, there should not be any traffic disruption or changes to the SSO state. But you will lose the capability the detect a split-brain scenario if all the Stackwise Virtual Links were to go down.