Perform this procedure to display vendor options definitions for DHCP Server.
show ip dhcp-server vendor-option-def
Display the DHCP server vendor options definitions information:
Switch:1#show ip dhcp-server vendor-option-def
================================================================================
                       DHCP Server Defined Vendor Options
================================================================================
CODE   TYPE           NAME                                                   
--------------------------------------------------------------------------------
1      string         -
2      uint32         firmware
--------------------------------------------------------------------------------