When attempting to add a 6509-E in VSS config, I can successfully log in, but it doesn't find any scopes. I have confirmed it works for our 3845 and 2851, so it appears to be a problem specific to this model.
Running "show ip dhcp pool" returns the following:
Pool Security_DHCP : Current index IP address range Leased/Total 10.1.25.53 10.1.25.1 - 10.1.25.254 73 / 254 Pool Digital_Signage : Current index IP address range Leased/Total 10.1.5.49 10.1.5.1 - 10.1.5.254 73 / 254 Pool WIRELESS_AP_DHCP : Current index IP address range Leased/Total 10.1.30.107 10.1.30.1 - 10.1.30.254 73 / 254