EX-31 Rule
13a-14(d)/15d-14(d) Certifications.





I, Helaine M. Kaplan,
certify that:



1. I have reviewed
this report on Form 10-K and all reports on Form 10-D required to be filed in
respect of the period covered by this report on Form 10-K of the CD 2017-CD6
Mortgage Trust (the "Exchange Act periodic reports");



2. Based on my
knowledge, the Exchange Act periodic reports, taken as a whole, do not contain
any untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period
covered by this report;



3. Based on my
knowledge, all of the distribution, servicing and other information required to
be provided under Form 10-D for the period covered by this report is included
in the Exchange Act periodic reports;



4. Based on my
knowledge and the servicer compliance statements required in this report under
Item 1123 of Regulation AB, and except as disclosed in the Exchange Act
periodic reports, the servicers have fulfilled their obligations under the
servicing agreements in all material respects; and



5. All of the reports
on assessment of compliance with servicing criteria for asset-backed securities
and their related attestation reports on assessment of compliance with
servicing criteria for asset-backed securities required to be included in this
report in accordance with Item 1122 of Regulation AB and Exchange Act Rules
13a-18 and 15d-18 have been included as an exhibit to this report, except as
otherwise disclosed in this report. Any material instances of noncompliance
described in such reports have been disclosed in this report on Form 10-K.



In giving the
certifications above, I have reasonably relied on information provided to me by
the following unaffiliated parties:



Wells Fargo Bank,
National Association, as Master Servicer, LNR Partners, LLC, as Special
Servicer, Wilmington Trust, National Association, as Trustee, Wells Fargo Bank,
National Association, as Certificate Administrator, Wells Fargo Bank, National
Association, as Custodian, Park Bridge Lender Services LLC, as Operating
Advisor, CoreLogic Commercial Real Estate Services, Inc., as Servicing Function
Participant, National Tax Search, LLC, as Servicing Function Participant, Wells
Fargo Bank, National Association, as Primary Servicer for the Gurnee Mills
Mortgage Loan, Rialto Capital Advisors, LLC, as Special Servicer for the Gurnee
Mills Mortgage Loan, Wilmington Trust, National Association, as Trustee for the
Gurnee Mills Mortgage Loan, Wells Fargo Bank, National Association, as
Certificate Administrator for the Gurnee Mills Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the Gurnee Mills Mortgage Loan, Park
Bridge Lender Services LLC, as Operating Advisor for the Gurnee Mills Mortgage
Loan, CoreLogic Commercial Real Estate Services, Inc., as Servicing Function
Participant for the Gurnee Mills Mortgage Loan, National Tax Search, LLC, as
Servicing Function Participant for the Gurnee Mills Mortgage Loan, Wells Fargo
Bank, National Association, as Primary Servicer for the Cleveland East Mortgage
Loan, LNR Partners, LLC, as Special Servicer for the Cleveland East Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the Cleveland East
Mortgage Loan, Wells Fargo Bank, National Association, as Certificate
Administrator for the Cleveland East Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Cleveland East Mortgage Loan, Trimont Real
Estate Advisors, LLC, as Operating Advisor for the Cleveland East Mortgage
Loan, CoreLogic Commercial Real Estate Services, Inc., as Servicing Function
Participant for the Cleveland East Mortgage Loan, National Tax Search, LLC, as
Servicing Function Participant for the Cleveland East Mortgage Loan, Wells
Fargo Bank, National Association, as Primary Servicer for the Colorado Center
Mortgage Loan, AEGON USA Realty Advisors, LLC, as Special Servicer for the
Colorado Center Mortgage Loan, Wilmington Trust, National Association, as
Trustee for the Colorado Center Mortgage Loan, Wells Fargo Bank, National
Association, as Certificate Administrator for the Colorado Center Mortgage
Loan, Wells Fargo Bank, National Association, as Custodian for the Colorado
Center Mortgage Loan, CoreLogic Commercial Real Estate Services, Inc., as
Servicing Function Participant for the Colorado Center Mortgage Loan, National
Tax Search, LLC, as Servicing Function Participant for the Colorado Center
Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Primary Servicer for the Integrated Health Campus Mortgage
Loan, Midland Loan Services, a Division of PNC Bank, National Association, as
Special Servicer for the Integrated Health Campus Mortgage Loan, Wells Fargo
Bank, National Association, as Trustee and Certificate Administrator for the
Integrated Health Campus Mortgage Loan, Wells Fargo Bank, National Association,
as Custodian for the Integrated Health Campus Mortgage Loan, Park Bridge Lender
Services LLC, as Operating Advisor for the Integrated Health Campus Mortgage
Loan, Wells Fargo Bank, National Association, as Primary Servicer for the
Corporate Woods Portfolio Mortgage Loan, KeyBank National Association, as
Special Servicer for the Corporate Woods Portfolio Mortgage Loan, Wilmington
Trust, National Association, as Trustee for the Corporate Woods Portfolio
Mortgage Loan, Citibank, N.A., as Certificate Administrator for the Corporate
Woods Portfolio Mortgage Loan, Citibank, N.A., as Custodian for the Corporate
Woods Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor
for the Corporate Woods Portfolio Mortgage Loan, CoreLogic Commercial Real
Estate Services, Inc., as Servicing Function Participant for the Corporate
Woods Portfolio Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the Corporate Woods Portfolio Mortgage Loan, U.S. Bank,
National Association, as Servicing Function Participant for the Corporate Woods
Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Primary
Servicer for the Burbank Office Portfolio Mortgage Loan, AEGON USA Realty
Advisors, LLC, as Special Servicer for the Burbank Office Portfolio Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the Burbank Office
Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Certificate
Administrator for the Burbank Office Portfolio Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the Burbank Office Portfolio Mortgage
Loan, Park Bridge Lender Services LLC, as Operating Advisor for the Burbank
Office Portfolio Mortgage Loan, CoreLogic Commercial Real Estate Services,
Inc., as Servicing Function Participant for the Burbank Office Portfolio
Mortgage Loan, National Tax Search, LLC, as Servicing Function Participant for
the Burbank Office Portfolio Mortgage Loan, Midland Loan Services, a Division
of PNC Bank, National Association, as Primary Servicer for the U-Haul SAC
Portfolios 14, 15, 17 Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Special Servicer for the U-Haul SAC Portfolios
14, 15, 17 Mortgage Loan, Wells Fargo Bank, National Association, as Trustee
and Certificate Administrator for the U-Haul SAC Portfolios 14, 15, 17 Mortgage
Loan, Wells Fargo Bank, National Association, as Custodian for the U-Haul SAC
Portfolios 14, 15, 17 Mortgage Loan, Pentalpha Surveillance LLC, as Operating
Advisor for the U-Haul SAC Portfolios 14, 15, 17 Mortgage Loan, Midland Loan
Services, a Division of PNC Bank, National Association, as Primary Servicer for
the IRG Portfolio Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer for the IRG Portfolio Mortgage Loan,
Wells Fargo Bank, National Association, as Trustee and Certificate
Administrator for the IRG Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the IRG Portfolio Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the IRG Portfolio Mortgage Loan,
Midland Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the Station Place III Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the Station
Place III Mortgage Loan, Wells Fargo Bank, National Association, as Trustee and
Certificate Administrator for the Station Place III Mortgage Loan, Wells Fargo
Bank, National Association, as Custodian for the Station Place III Mortgage
Loan, Pentalpha Surveillance LLC, as Operating Advisor for the Station Place
III Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Primary Servicer for the Moffett Place Building 4 Mortgage
Loan, Midland Loan Services, a Division of PNC Bank, National Association, as
Special Servicer for the Moffett Place Building 4 Mortgage Loan, Wells Fargo
Bank, National Association, as Trustee and Certificate Administrator for the
Moffett Place Building 4 Mortgage Loan, Wells Fargo Bank, National Association,
as Custodian for the Moffett Place Building 4 Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the Moffett Place Building 4
Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Primary Servicer for the Covance Business Center Mortgage Loan,
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer for the Covance Business Center Mortgage Loan, Wells Fargo Bank,
National Association, as Trustee and Certificate Administrator for the Covance
Business Center Mortgage Loan, Wells Fargo Bank, National Association, as
Custodian for the Covance Business Center Mortgage Loan, and Pentalpha
Surveillance LLC, as Operating Advisor for the Covance Business Center Mortgage
Loan.







Dated: March 20, 2018





/s/ Helaine M. Kaplan





President

(senior officer in charge of
securitization of the depositor)