Hi,
Looking at the config guide for IOS/XE 3.6.0
QUAD supervisors ARE supported
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/XE3-6-0E/15-22E/configuration/guide/xe-360-config.html
Then in the VSS section.
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/XE3-6-0E/15-22E/configuration/guide/xe-360-config/vss.html#85440
I suggest you look for the correct config guide for your IOS/XE and read thoroughly
INDEX:-
http://www.cisco.com/c/en/us/support/switches/catalyst-4500-series-switches/products-installation-and-configuration-guides-list.html
Regards
Alex
Regards,
Alex.
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