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Describes ANSI/TIA-942 TelecommunicationsInfrastructure Standard for Data Centers
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IEEE 802.3 HSSG
Telecommunications Infrastructure Telecommunications Infrastructure Standard for Data CentersStandard for Data Centers
ANSI/TIAANSI/TIA--942942
Chris [email protected] Communications
IEEE 802.3 HSSG
Data Center StandardsANSI/TIAANSI/TIA--942 Telecommunications 942 Telecommunications Infrastructure Standard for Data Centers Infrastructure Standard for Data Centers
CoCo--chairs: Chris DiMinico & Jonathan Jew chairs: Chris DiMinico & Jonathan Jew Published 2005 Published 2005 –– available through TIA at available through TIA at www.tiaonline.orgwww.tiaonline.org
ANSI/NECA/BICSIANSI/NECA/BICSI--002 Data Center Design 002 Data Center Design and Implementation Best Practicesand Implementation Best Practices
coco--chairs: Jonathan Jew & John Kacperskichairs: Jonathan Jew & John Kacperskibest practices best practices –– complements TIAcomplements TIA--942 942 ––2007 target2007 target
IEEE 802.3 HSSG
Who Developed TIA-942?Developed by the TIA TRDeveloped by the TIA TR--42.1.1 Network 42.1.1 Network Distribution Nodes subcommittee as Project Distribution Nodes subcommittee as Project No. 3No. 3--00920092Participants included:Participants included:
Architecture & Engineering FirmsArchitecture & Engineering FirmsConsultantsConsultantsEnd UsersEnd UsersManufacturersManufacturers
IEEE 802.3 HSSG
Purpose of TIA-942Encourage early participation of telecom Encourage early participation of telecom designers in data center design processdesigners in data center design processFill a void by providing standards for planning Fill a void by providing standards for planning of data centers, computer rooms, server of data centers, computer rooms, server rooms, and similar spaces.rooms, and similar spaces.The standard encompasses much more than The standard encompasses much more than just telecommunications infrastructure.just telecommunications infrastructure.Close to half of the technical content deals Close to half of the technical content deals with facility specifications.with facility specifications.
IEEE 802.3 HSSG
Purpose of TIA-942Define a standard telecommunications Define a standard telecommunications infrastructure for data centersinfrastructure for data centers
Structured cabling system for data centers using Structured cabling system for data centers using standardized architecture and mediastandardized architecture and mediaAccommodates a wide range of applications (LAN, Accommodates a wide range of applications (LAN, WAN, SAN, channels, consoles)WAN, SAN, channels, consoles)Accommodates current and future protocols Accommodates current and future protocols (e.g., 10+ (e.g., 10+ GbEGbE ))Replaces unstructured pointReplaces unstructured point--toto--point cabling that point cabling that uses different cabling for different applicationsuses different cabling for different applications
IEEE 802.3 HSSG
Purpose of TIA-942Specifications for data center Specifications for data center telecommunications pathways and spacestelecommunications pathways and spacesRecommendations on media and distance for Recommendations on media and distance for applications over structured cabling applications over structured cabling Establish a standard for data center tiers to Establish a standard for data center tiers to replace several proprietary standards. The replace several proprietary standards. The TIA data center tier standard is:TIA data center tier standard is:•• A tool to evaluate existing data centersA tool to evaluate existing data centers•• A tool to communicate design A tool to communicate design
requirementsrequirements
IEEE 802.3 HSSG
Unstructured CablingH
eate
r -A/
C
Heater - A/CHeater - A/C Heater - A/C
247-7538
HALONABORTHALON
RELEASE
247-7543
HALONPANEL
LOCKER
TAPE RACK
NETWORKCABINET
H5
NETWORKCABINET
H4
NETWORKCABINET
H3
NETWORKCABINET
H2
NETWORKCABINET
H6
NETWORKCABINET
H7
NETWORKCABINET
H1
NETWORKCABINET
G4
NETWORKCABINET
G3
NETWORKCABINET
G2
NETWORKCABINET
G1
NETWORKCABINET
G5
TAB
LE
TAPE RACK
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CAB
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ABIN
ETI1
TAPE RACK
NETWORKCABINET
H8
NETWORKCABINET
G6
NETWORKCABINET
G7
NETWORKCABINET
F4
NETWORKCABINET
F3
NETWORKCABINET
F2
NETWORKCABINET
F5
LANCABINET
F1
NETWORKCABINET
F6
NETWORKCABINET
E5
NETWORKCABINET
E4
NETWORKCABINET
E3
NETWORKCABINET
E2
NETWORKCABINET
E1
NETWORKCABINET
E6
SAACABINET
D2
NETWORKCABINET
E 7IBMCAB
SAACABINET
D1
NETWORKCABINET
B5
NETWORKCABINET
B4
NETWORKCABINET
B3
NETWORKCABINET
B2
NETWORKCABINET
B1
NETWORKCABINET
B6
NETWORKCABINET
C5
NETWORKCABINET
C4
NETWORKCABINET
C3
NETWORKCABINET
C2
NETWORKCABINET
C1
NETWORKCABINET
C6
NETWORKCABINET
B7
CD ROMSCANNER
AT &T
DEFINITY
UNIT
HPPRINTER
NETWORKCABINET
A6
NETWORKCABINET
A5
NETWORKCABINET
A 4
NETWORKCABINET
A3
NETWORKCABINET
A2
TABLE247-7589
TABLE
CISCO
RO
UTE
RC
ONS
OLE
F/X
IBMDASD
IBMDASD
IBMAS-400
IBMAS-400
IBMS-390R34
IBM3746-900
IBM3745-17A
IBM3745-L13
IBM
3745-41D
IBM3745-A11
POM
ON
AA
/C U
NIT
#8
STO
RAG
EC
ABI
NE
T
DES
K
DESKSTORAGECABINET
PAC
BELL
CAB
INE
TA1
3174CABINET
TABLE STORAGECABINET
STORAGECABINET
LIEBERTPDU-C
3174CABINET
3174CABINET
3174CABINET
3174CABINET
3174CABINET
POMONAA/C UNIT
#6
POMONAA/C UNIT
#7
FI LE
CABINETFILE
CABI NET
FILE
CABINET
FILE
CABINET
G H I J K L M N O P Q R S T U V W X Y Z AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR ASC D E FBA
2
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NETWORK
INSTALL A CABLE WHEN YOU NEED IT (SINGLE-USE, UNORGANIZED CABLING)
IEEE 802.3 HSSG
Structured CablingH
eate
r -A
/C
Heater - A/CHeater - A/C Heater - A/C
247-7538
HALONABORTHALON
RELEASE
247-7543
HALONPANEL
LOCKER
TAPE RACK
NETWORKCABINET
H5
NETWORKCABINET
H4
NETWORKCABINET
H3
NETWORKCABINET
H2
NETWORKCABINET
H6
NETWORKCABINET
H7
NETWORKCABINET
H1
NETWORKCABINET
G4
NETWORKCABINET
G3
NETWORKCABINET
G2
NETWORKCABINET
G1
NETWORKCABINET
G5
TA
BLE
TAPE RACK
NETW
OR
KC
ABIN
ETI8
NET
WOR
KCA
BIN
ET
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NETW
OR
KCA
BIN
ETI6
NETW
ORK
CAB
INET
I5
NETW
ORK
CAB
INET
I4
NETW
ORK
CABI
NET
I3
NETW
ORK
CABI
NET
I2
NETW
OR
KC
ABIN
ETI1
TAPE RACK
NETWORKCABINET
H8
NETWORKCABINET
G6
NETWORKCABINET
G7
NETWORKCABINET
F4
NETWORKCABINET
F3
NETWORKCABINET
F2
NETWORKCABINET
F5
LANCABINET
F 1
NETWORKCABINET
F6
NETWORKCABINET
E5
NETWORKCABINET
E4
NETWORKCABINET
E3
NETWORKCABINET
E2
NETWORKCABINET
E1
NETWORKCABINET
E6
SAACABINET
D2
NETWORKCABINET
E7IBMCAB
SAACABINET
D1
NETWORKCABINET
B5
NETWORKCABINET
B4
NETWORKCABINET
B3
NETWORKCABINET
B2
NETWORKCABINET
B1
NETWORKCABINET
B6
NETWORKCABINET
C5
NETWORKCABINET
C4
NETWORKCABINET
C3
NETWORKCABINET
C2
NETWORKCABINET
C1
NETWORKCABINET
C6
NETWORKCABINET
B 7
CD ROMSCANNER
AT&TDEFINITY
UNIT
HPPRINTER
NETWORKCABINET
A6
NETWORKCABINET
A5
NETWORKCABINET
A4
NETWORKCABINET
A3
NETWORKCABINET
A2
TABLE247-7589
TABLE
CISC
O
RO
UTER
CO
NSO
LE
F/X
IBMDASD
IBMDASD
IBMAS-400
IBMAS-400
IBMS-390R34
IBM3746-900
IBM3745-17A
IBM3745-L13
IBM
3745-41D
IBM3745-A11
PO
MO
NA
A/C
UN
IT
#8
STO
RAG
EC
ABIN
ET
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DESKSTORAGECABINET
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NE
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1
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TABLE STORAGECABINET
STORAGECABINET
LIEBERTPDU-C
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3174CABINET
3174CABINET
3174CABINET
3174CABINET
POMONAA/C UNIT
#6
POMONAA/C UNIT
#7
FILECABINET
FILECABINET
FIL ECABINET
FIL ECABINET
G H I J K L M N O P Q R S T U V W X Y Z AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR ASC D E FBA
2
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
FIBER MDF& CORE
COPPER MDF
IDFIDF
IDF
IDF
IDF
STRUCTURED CABLING SYSTEM (ORGANIZED, REUSABLE, FLEXIBLE CABLING)
IDF
IDF IDF
IDFIDF
Mainframe
IBM 3745s
IEEE 802.3 HSSG
Cabling DesignCabling DesignFacility DesignFacility DesignNetwork DesignNetwork Design
Informative annex’s: Provide best practicesInformative annex’s: Provide best practicesAnnex A Annex A -- Cabling Design ConsiderationsCabling Design ConsiderationsAnnex BAnnex B-- Telecommunications infrastructure Telecommunications infrastructure administrationadministrationAnnex CAnnex C--Access provider informationAccess provider informationAnnex DAnnex D-- Coordination of equipment plans with Coordination of equipment plans with other engineersother engineersAnnex EAnnex E-- Data center space considerationsData center space considerationsAnnex FAnnex F-- Site selectionSite selection
Design Elements
IEEE 802.3 HSSG
Design ElementsCabling Design:Cabling Design:
Copper and fiber cabling performanceCopper and fiber cabling performanceConnectors, cables, distribution hardwareConnectors, cables, distribution hardwareCabling distancesCabling distancesSpace managementSpace management
Facility Design:Facility Design:
Data center sizingData center sizingPower distribution methodologiesPower distribution methodologiesPathways and spacesPathways and spacesHVAC, security, operations, and administration.HVAC, security, operations, and administration.Flexibility, scalability, reliability and space Flexibility, scalability, reliability and space managementmanagement
IEEE 802.3 HSSG
Design Elements
Network Design:Network Design:
Support of legacy systemsSupport of legacy systemsEnable rapid deployment of new and emerging Enable rapid deployment of new and emerging technologies such as 10 technologies such as 10 GbEGbE and 10+ and 10+ GbEGbEcopper and fiber applications. copper and fiber applications.
IEEE 802.3 HSSG
Relationship of SpacesBUILDING SITE
DATA CENTERDATA CENTERELECTRICAL &MECHANICAL ROOMS
SUPPORTSTAFFOFFICES
OPERATIONSCENTER
STORAGE ROOMS& LOADING DOCKS
BUILDING SHELLGENERAL OFFICESPACE
OFFICE BUILDINGSUPPORT SPACE
ENTRANCEROOM(S)
TELECOM ROOMS &EQUIPMENT ROOMSfor spaces outside datacenter
COMPUTER ROOM
TELECOM ROOM(S)for data centersupport spaces
IEEE 802.3 HSSG
MC
IC IC IC IC
Entrance Facility
MC
Carriers Carriers
HC
Offices, OperationsCenter, Support Rooms
Data Center
HC HC HC
Carriers
Carriers
Active Equipinterconnect
Active EquipStorage Area Devices
interconnect
Active Equip
interconnect
Active Equipinterconnect
Active Equipinterconnect
Active Equipinterconnect
Secondary Entrance Room
Entrance Room
Back boneCabling
Active Equipinterconnect
ZoneDistributionHorizontal
Cabling
Data Center Topology
IEEE 802.3 HSSG
TIA-942 SpacesEntrance Room (ER) Entrance Room (ER) -- location of interface location of interface with campus and carrier entrance facilitieswith campus and carrier entrance facilitiesMain Distribution Area (MDA)Main Distribution Area (MDA) –– location of location of main crossmain cross--connect (MC)connect (MC)Horizontal Distribution Area (HDA)Horizontal Distribution Area (HDA) –– location location of horizontal crossof horizontal cross--connect (HC)connect (HC)Zone Distribution Area (ZDA)Zone Distribution Area (ZDA) –– location of location of zone outlet (ZO) or consolidation point (CP)zone outlet (ZO) or consolidation point (CP)Equipment Distribution Area (EDA)Equipment Distribution Area (EDA) –– location location of equipment cabinets and racksof equipment cabinets and racks
IEEE 802.3 HSSG
MC
IC IC
MC
HC HC
Active Equipinterconnect Active Equip
interconnect
Active Equipinterconnect
ZoneDistribution
Area
HorizontalCabling
MainDistribution
Area
HorizontalDistribution
Area
EquipmentDistribution
Area
BackboneCabling
Data Center Cabling
Horizontal cabling is the cabling from the horizontal cross-connect (in the main distribution area or horizontal distribution area) to the outlet in the equipment distribution area or zone distribution area.
IEEE 802.3 HSSG
Recognized Cables:Recognized Cables:a) 100-ohm twisted-pair cable (ANSI/TIA/EIA-568-B.2), category 6 recommended (ANSI/TIA/EIA-568-B.2-1)b) multimode optical fiber cable, either 62.5/125 micron or 50/125 micron (ANSI/TIA/EIA-568-B.3), 50/125 micron 850 nm laser optimized multimode fiber is recommended (ANSI/TIA-568-3-1)c) singlemode optical fiber cable (ANSI/TIA/EIA-568-B.3)d) 75-ohm (734 and 735 type) coaxial cable (Telcordia Technologies GR-139-CORE)
Horizontal and Backbone Cabling
IEEE 802.3 HSSG
Horizontal cabling distances The maximum horizontal distance is 90 m The maximum horizontal distance is 90 m independent of media type.independent of media type.The maximum channel distance including The maximum channel distance including equipment cords is 100 m. equipment cords is 100 m. The maximum cabling distance in a data The maximum cabling distance in a data center not containing a horizontal center not containing a horizontal distribution area is:distribution area is:
300 m for an optical fiber channel including 300 m for an optical fiber channel including equipment cords.equipment cords.100 m for copper cabling including equipment 100 m for copper cabling including equipment cords. cords.
IEEE 802.3 HSSG
Backbone CablingIncludes cabling from MDA to ER, HDAIncludes cabling from MDA to ER, HDAOptional cabling between Optional cabling between HDAsHDAs allowedallowedMaximum backbone cable lengths depend on Maximum backbone cable lengths depend on applications to be supportedapplications to be supportedCentralized optical fiber cabling supported Centralized optical fiber cabling supported with interconnect, splice, or pullwith interconnect, splice, or pull--through at through at the HDAthe HDAStar topology with no intermediate crossStar topology with no intermediate cross--connectsconnectsVarious topologies permit redundancy and Various topologies permit redundancy and flexibility to support various data center sizesflexibility to support various data center sizes
IEEE 802.3 HSSG
Computer Room & Entrance Room Requirements
Min clear height of 2.6m/8.5 ftMin clear height of 2.6m/8.5 ftMin door size 1m/3ft wide 2.13/7ft highMin door size 1m/3ft wide 2.13/7ft highMin dist floor loading 7.2 kPA/150lbf/ft2, Min dist floor loading 7.2 kPA/150lbf/ft2, recommended min 12 kPA/250 lbf/ft2recommended min 12 kPA/250 lbf/ft220 degrees C to 25 degrees C20 degrees C to 25 degrees C40% to 55% relative humidity (reduces ESD)40% to 55% relative humidity (reduces ESD)Any sprinkler systems must be preAny sprinkler systems must be pre--action action systemsystemCommon bonding network (CBN) Common bonding network (CBN) ––equipotential ground referenceequipotential ground reference
IEEE 802.3 HSSG
Main Distribution AreaLocation of Main CrossLocation of Main Cross--Connect (MC), the Connect (MC), the central point of distribution for data center central point of distribution for data center structured cabling systemstructured cabling systemCentrally located to avoid exceeding Centrally located to avoid exceeding maximum distance restrictions (typically for Emaximum distance restrictions (typically for E--1s, E1s, E--3s, T3s, T--1s and T1s and T--3s)3s)Install separate racks for Fiber, UTP, and Install separate racks for Fiber, UTP, and coaxial cable distributioncoaxial cable distribution
IEEE 802.3 HSSG
Horizontal Distribution AreaLocation of Horizontal CrossLocation of Horizontal Cross--Connect (HC), Connect (HC), the distribution point for cabling to equipment the distribution point for cabling to equipment distribution area distribution area Distribution LAN, SAN, KVM switches and Distribution LAN, SAN, KVM switches and console servers located in HDAconsole servers located in HDAMDA may also include an HC for nearby MDA may also include an HC for nearby equipment distribution areaequipment distribution areaNumber of Number of HDAsHDAs depends on the density of depends on the density of cabling and the size of the data centercabling and the size of the data center
IEEE 802.3 HSSG
Horizontal Distribution AreaThe capacity of the cable tray system and the The capacity of the cable tray system and the size of the crosssize of the cross--connect creates practical connect creates practical limits on the size of the HClimits on the size of the HCGuideline is maximum of 2,000 4Guideline is maximum of 2,000 4--pair UTP or pair UTP or coax cable terminations per HDAcoax cable terminations per HDAArrange patch bays to minimize patch cable Arrange patch bays to minimize patch cable lengths and to simplify cable managementlengths and to simplify cable management
Separate racks for fiber, UTP, and coaxSeparate racks for fiber, UTP, and coaxLocate switches and patch panels to Locate switches and patch panels to minimize patch cord lengthsminimize patch cord lengths
IEEE 802.3 HSSG
Zone Distribution Area Rack, cabinet, or under floor enclosure that houses a Rack, cabinet, or under floor enclosure that houses a zone outlet (ZO) or consolidation point (CP) zone outlet (ZO) or consolidation point (CP) ZO ZO -- structured cabling termination for floorstructured cabling termination for floor--standing standing equipment that cannot accept patch panels (e.g. equipment that cannot accept patch panels (e.g. mainframes and large servers).mainframes and large servers).CP CP -- intermediate termination point (e.g. cabling to intermediate termination point (e.g. cabling to areas where floor plan is uncertain or dynamic)areas where floor plan is uncertain or dynamic)No crossNo cross--connects within the ZDAconnects within the ZDANo active equipment shall be located in the ZDANo active equipment shall be located in the ZDAMaximum of 144 connections in a ZDAMaximum of 144 connections in a ZDAMaximum of one ZDA within a horizontal cable runMaximum of one ZDA within a horizontal cable run
IEEE 802.3 HSSG
Equipment CabinetsFront rails of cabinets must be recessed to provide adequate room for patch cables and wire managersRecommend 1-to-1 ratio of patching to cable managementArrange switches and patch panels to minimize patching between cabinets & racksPerforated tiles at front of cabinetsOne edge of cabinets placed at edge of tile
IEEE 802.3 HSSG
Raised FloorBetter appearance than overhead cabling.Better appearance than overhead cabling.Allows higher power densities, better control Allows higher power densities, better control of cooling, and more flexibility in location of of cooling, and more flexibility in location of cooling equipmentcooling equipmentMost standMost stand--alone computer systems are alone computer systems are designed for cabling from belowdesigned for cabling from belowCoordinate under floor cabling with Coordinate under floor cabling with mechanical & electrical engineers mechanical & electrical engineers Recommend wire basket cable trays in hot Recommend wire basket cable trays in hot aisles for telecom cablingaisles for telecom cabling
IEEE 802.3 HSSG
Example of Wire Basket Cable Trays For Cabling Under Raised Floor
24"On Center
RAISED FLOOR TILE
SUPPORT STRUT
36"
24"
4"
9"
FIBER
5"
SUPPORT STRUT
18"COPPER
CABLING4"
13.5"
DIVIDER
FIBER
5"18"COPPER
CABLING
12"
1.375"
1"
1"
Open Area
IEEE 802.3 HSSG
Overhead Cable TraysLess expensive than raised floor systemsLess expensive than raised floor systemsCable trays can be attached to the top of Cable trays can be attached to the top of racks and cabinets (if they are uniform in racks and cabinets (if they are uniform in height) height) Cable trays suspended from the ceiling Cable trays suspended from the ceiling provides more flexibility for supporting provides more flexibility for supporting cabinets/racks of various heights and for cabinets/racks of various heights and for adding and removing cabinets/racks.adding and removing cabinets/racks.Cable trays can be installed with several Cable trays can be installed with several layerslayersCoordinate location with lighting, ducts, Coordinate location with lighting, ducts, overhead conduits, overhead power overhead conduits, overhead power distributiondistribution
IEEE 802.3 HSSG
Overhead Cable Tray Example3 Layer cable tray system:3 Layer cable tray system:
Bottom layer Bottom layer –– signal signal Middle layer Middle layer –– power power Top layer Top layer –– fiberfiberSignal Reference Grid in Signal Reference Grid in brackets attached to lower brackets attached to lower layer of trayslayer of traysFiber patch cables may be Fiber patch cables may be in fiber duct attached to in fiber duct attached to threaded rodsthreaded rods
IEEE 802.3 HSSG
Infrastructure Administration
Informative annex with TIAInformative annex with TIA--606606--A standards A standards compliant labeling scheme for all compliant labeling scheme for all components.components.Labeling scheme extended for use in data Labeling scheme extended for use in data centerscentersCabinets and racks labeled by location using Cabinets and racks labeled by location using tile grid or row/position identifierstile grid or row/position identifiersAll cabinets, racks, patch panels, cables, and All cabinets, racks, patch panels, cables, and patch cords should be labeledpatch cords should be labeled
IEEE 802.3 HSSG
Labeling ExampleAK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ BA BB BC BDAE AF AG AH AI AJAC ADAB
09
10
11
12
13
AA
01
02
03
04
05
06
07
08
"X" COORDINATE
"Y" COORDINATE
CABINET AJ05
RIGHTFRONT
CORNER CABINET AQ03
Cat 6 x 24
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
AJ05-A to AQ03-B Ports 01-24
A A
Patch Panel for 24 Cat 6 from 1st Panel in Cab AJ05 to 2nd Panel in Cab AQ03
IEEE 802.3 HSSG
Site Selection
Informative annex with guidelines for Informative annex with guidelines for selection of a site for a data centerselection of a site for a data center
ArchitecturalArchitecturalElectricalElectricalMechanicalMechanicalTelecommunicationsTelecommunicationsSecuritySecurityOtherOther
IEEE 802.3 HSSG
Facilities Specifications & TiersInformative annex with general architectural, Informative annex with general architectural, structural, electrical, mechanical, and structural, electrical, mechanical, and telecommunications recommendations requirements telecommunications recommendations requirements Annex includes detailed architectural, security, Annex includes detailed architectural, security, electrical, mechanical, and telecommunications electrical, mechanical, and telecommunications recommendations for each Tierrecommendations for each TierRecommended specifications by tier are a uniform Recommended specifications by tier are a uniform way to rate aspects of a data center design and are a way to rate aspects of a data center design and are a starting point for initiating design requirements with starting point for initiating design requirements with qualified architects and engineersqualified architects and engineers
IEEE 802.3 HSSG
Data Center TiersTier 1 Tier 1 –– basic data center basic data center
no redundancyno redundancyTier 2 Tier 2 –– redundant componentsredundant components
Single distribution path with redundant Single distribution path with redundant componentscomponents
Tier 3 Tier 3 –– concurrently maintainableconcurrently maintainableMultiple distribution paths with only one Multiple distribution paths with only one activeactive
Tier 4 Tier 4 –– fault tolerantfault tolerantMultiple active distribution pathsMultiple active distribution paths
IEEE 802.3 HSSG
Redundant Topologies
Primary EntranceRoom
(Tier 1 and higher)
Horiz Dist Area
Equip DistArea
ComputerRoom
Horiz Dist AreaZone Dist Area
Offices, OperationsCenter, Support
Rooms
Telecom Room
OptionalCabling
Main Dist Area(Tier 1 and higher)
Horiz Dist Area
Equip DistArea
Equip DistArea
SecondaryEntrance Room
(Tier 3 and higher)
Secondary DistArea
(Optional for Tier 4)
Carriers
Primary CustomerMaintenance Hole(Tier 1 and higher)
SecondaryCustomer
Maintenance Hole(Tier 2 and higher)
Tier 1
Tier 3
Tier 1
Tier 4
Tier 3
Tier 2
Tier 4
Tier 3
Tier 4
Carriers Carriers Carriers
Data Center
Tier 3
IEEE 802.3 HSSG
Data Center TiersHigher tiers correspond to higher availability, but also Higher tiers correspond to higher availability, but also have higher construction costs have higher construction costs Data Center can have different tier ratings for Data Center can have different tier ratings for different portions of its infrastructure (architectural, different portions of its infrastructure (architectural, security, mechanical, electrical, telecommunications)security, mechanical, electrical, telecommunications)The overall rating for the data center is equal to the The overall rating for the data center is equal to the lowest tier rating lowest tier rating Capacity of systems may need to be upgraded to Capacity of systems may need to be upgraded to maintain tier rating as data center load increasesmaintain tier rating as data center load increasesHuman error and operating procedures have a major Human error and operating procedures have a major impact on availabilityimpact on availability
IEEE 802.3 HSSG
ConclusionTIATIA--942 is the first standard to specifically addresses data 942 is the first standard to specifically addresses data center infrastructure.center infrastructure.Primarily a telecom infrastructure standard, but about half Primarily a telecom infrastructure standard, but about half of the content deals with facility requirements.of the content deals with facility requirements.Provides a flexible and manageable structured cabling Provides a flexible and manageable structured cabling system using standard media.system using standard media.Builds on existing standards, when applicableBuilds on existing standards, when applicableGuidelines on a wide range of subjects useful to someone Guidelines on a wide range of subjects useful to someone designing or managing a data center.designing or managing a data center.An official An official tieringtiering standard for determining the quality of a standard for determining the quality of a center. A way to objectively compare one center with center. A way to objectively compare one center with another.another.
