To open a TAC request, you must first register for a Cisco.com user ID. Your contract number should be associated with a Cisco.com user ID. You can do so by visiting the "Access" tab in your Cisco Account Profile. If you don't know your contract number, please contact your Cisco partner or account representative.
Once you have a Cisco.com user ID, you can initiate or check on the status of a support case online, by email, or by contacting the TAC by phone: