OCP for Telco The challenge and the solution OCP engineering workshop 2.11.2016 Juha Klemola Senior HW architect, System Design Nokia

OCP for Telco The challenge and the solution OCP Telco challenge – what is needed to make OCP ”Telco ready”? NEBS – how to deal with requirements without over-engineering the OCP? NEBS fire resistance solution NEBS seismic solution EMI shielding – Open design vs. EMI requirements Cabling requirements – “Environmental requirements and directives” DCM & Datacenter operations automation Discussion

OCP Telco challenge – what is needed to make OCP ”Telco ready”? Originally The OCP is not designed for: Fulfill regulatory approvals of FCC & CE Fulfill the spatial requirements set by old central office infrastructure Support telecommunication equipment -48VDC power supply interface Fulfill the harsh environmental criteria’s used with legacy Telecommunication equipment DCM & Datacenter operations automation Cabling requirements – “Environmental requirements and directives”

NEBS – how to deal with requirements without over-engineering the OCP? Originally OCP is not designed for NEBS criteria. Some of the NEBS requirement are conflicting with OCP design philosophy about fast deployment, cost optimization and serviceability. Thus some compromises might be need in design to avoid the over-engineering Nokia plan is pull set of NEBS and ETSI enhancements to Nokia next OCP release and maintain compatibility to the OpenRack standard.

NEBS fire resistance solution for OCP To be fully compliant the Telcordia GR-63-CORE fire resistance criteria fire resistant materials used To solve the fire spread criteria compute sledges within the tree bay cubby designed as fire enclosures. OCP serviceability and rack standard compliancy maintained with this design. Compute sledge closed from fronts side and Cubby from rear side with sealing kits

NEBS GR-63 Zone 2/4 seismic solution for OCP Baseline Requirements : Single rack NEBS Zone 2 with 850kg IT load Dual rack NEBS Zone 4 with 850kg IT load

NEBS risk zone 2 Seismic solution for OCP Key idea use the three bay cubby as strengthening member for the v2 rack frame Cubby sides fixed with screw to the v2 rack vertical posts to provide additional strength Need to introduce new mounting holes for the cubby specification

NEBS risk zone 2 simulation results for sigle rack (natural frequency criteria) Natural frequency > 2 (Hz.) Result: Side-to-Side 5.2Hz Front-to-Rear 8.5Hz Conclusion: Pass

NEBS risk zone 2 simulation results for sigle rack (displacement criteria) Displacement of top of frame < 76.2 mm Result: Side-to-Side 46,7mm Front-to-Rear 29.8mm Conclusion: Pass

NEBS risk zone 4 simulation results for dual racks linked (displacement criteria) Displacement of top of frame < 76.2 mm With screw fixed cubby in v2 rack we cannot pass the Zone 4 criteria. In addition of that additional strengthening members needed

NEBS risk zone 4 Seismic solution for OCP Seismic X-bracing doors kit enables full OCP serviceability also for JBOD fans. For service actions X- bracing door can be opened without the tools Same door for front and rear optimized for high air flow

EMI shielding – Open design vs. EMI requirements To fulfill mandatory EMC conformity requirements i.e. FCC and CE. Open design need to enhanced. This important especially in CO locations data centers Nokia is implementing the EMI shielding primarily in the compute sledge level (to fulfill same time the NEBS fire spread criteria).

Cabling requirements – “Environmental requirements and directives” Cabling space is challenge in dense OCP rack: Large scale datacenter and telecom VNF Ethernet cabling requirements are different: Typically 1 Ethernet port/ server in datacenters and up to 4 in Telco designs Tighter environmental requirements in telecom area (like IEC 60332-1 and/or UL® 1581, UL 1666 and UL 910 for large installations) Usage of LSZH cabling is typical solution to fulfill these requirements However usage of more flexible PVC cabling inside system and even inside one floor is allowed Sled and three bay cubby replacement is mandatory requirement in fully cabled rack

Cabling requirements – “Environmental requirements and directives” Nokia solution to manage high quality and serviceability of cabling Select Leaf and HW management switch positions to middle of rack Use sufficient amount of cable management accessories Productize both PVC and LSZH cable variants to support various customer requirements

Nokia Data Center Manager Data Center operations automation DC Hardware Management Automatic HW discovery & inventory Events, KPI monitoring & alerting Thermal & power management Configuration & firmware management HW-Agnostic Supports Airframe AND 3rd party Hardware Servers, switches, storages, racks and facilities Scalable Multi Data Center management From small distributed to centralized hyperscale Web User interface RESTful APIs North bound integration with cloud controllers, bare-metal environments and umbrella OSSs South bound extensible hardware support Built-in user programmable Analytics and Intelligent control

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