When configuring a CatOS switch to work with the ASA sub-interfaces, are these the right commands? Thanks much.
clear trunk 2/28 1-91,94-1005,1025-4094
set trunk 2/28 on dot1q 92-93
Okay, your trunk has a native vlan of 92 which means the packets sent for this vlan will not be tagged.
I don't have an ASA to test with but it may be that the ASA is expecting a tagged packet on vlan 92. So you could try changing the native vlan on the trunk link to something other than vlan 92 - the native vlan shouldn't be used to carry data traffic again.
Are your ASA subinteraces up ?