-
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
NET
WOR
KCA
BIN
ET
I8
NETW
ORK
CABI
NET
I7
NET
WOR
KC
ABIN
ETI6
NET
WOR
KCA
BIN
ET
I5
NETW
ORK
CAB
INET
I4
NETW
ORK
CAB
INET
I3
NETW
ORK
CAB
INET
I2
NET
WOR
KC
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
I7
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
DESK
DESKSTORAGECABINET
PAC
BEL
LC
ABI
NE
TA
1
3174CABINET
TABLE STORAGECABINET
STORAGECABINET
LIEBERTPDU-C
3174CABINET
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
ZoneDistributionHorizontalCabling
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.
