Category 8 paves the way for IEEE 40GBASE-T David Hughes RCDD/DCDC/NTS Senior Technical Manager MEA CommScope
Agenda Market need for 40 G over balanced twisted pair cabling Standards ISO/IEC 11801-99-1 Channels for 40 Gb/s ANSI/TIA-568-C.2-1 Category 8 specifications IEEE 802.3bq 40GBASE-T developments Category 8 design and installation considerations Testing Category 8 Laboratory Measurements Category 8 Field Measurements Summary and Conclusions
IEEE 802.3 CFI market potential
Cisco VNI 2013 Mobile forecast 1 followed by 18 zeros! 1 EB = 50,000 Yrs of DVD Quality Data
Category 8 Evolution CFI: Call-For-Interest SG: Study Group TF: Task Force
CFI Early Requirements Backwards Compatibility/ Autonegotation Next Gen BASE-T Auto-negotiation will be integral, compatible with 10GBASE-T and 1000BASE-T Cabling 4-twisted pair 8 pair, twinax Cost factors Reach Integration No active elements, assume twisted pair, widely sourced 40GBASE-CR4 Breakout can interface with SFP+ or SFP, NO Auto-negotiation QSFP end point with finite cost and assembly complexity, some vendors restrict sourcing End of Row, 30m or more, defined 7m, then must use active cable by study group LOM-able, compatible with silicon CR4 well suited for integration into integration CMOS ASICs
TIA Link Length Survey (TR42.7-2013-02-003) cumulative average 35% 55% 75% 91% 100%
2013 Highlights JANUARY 22 Category 8 channel demonstration to IEEE February 13 TIA TR42 Meeting (02/13) Propose CAT 8 as name MARCH 13 ISO/IEC agreement on Category 8 naming convention MARCH 20 40GBASE-T Task Force (802.3bq) announced.
Learning Lessons from 10GBASE-T 1 st Gen PHYs 90 nm 2 nd Gen PHYs 65 nm 3 rd Gen PHYs 40 nm 4 th Gen PHYs 28 nm 10 watt power consumption 6 watt power consumption <4 watt power consumption <2.5 watt power consumption
LAN On Motherboard (LOM) LOM removes the cost barrier to adopt 10G on servers 10G Server LOM started volume shipments in 2012 Server vendors require LOM to be backward compatible, hence LOMs should support: interoperability with 100M/1G/10G switches support RJ45 cabling infrastructure
Cost advantages of structured cabling Balanced twisted pair structured cabling based BASE-T has always been the cheapest option for Ethernet This is confirmed by a CCCA study (May 2013) using: an actual 39-cabinet row in a data center average of 5 to 6kW per cabinet dual network, redundant power supplies 14 servers per cabinet four uplinks per switch 2.5-meter SFP+ direct attach cable assemblies for each used ToR port Category 6A UTP for structured cabling Structured cabling vs. Top of Rack (TOR) is half the cost!
Cost comparison of TOR vs. Structured
TIA-568-C.2-1 Category 8 parameters Category 8 specifications include improved requirements up to 2 GHz for: Insertion Loss Return Loss NEXT and PSNEXT ACRF and PSACRF Alien cross-talk parameters, balance parameters, and coupling attenuation Propagation Delay and Delay skew TIA TR42.7 Approved Cat 8 Project in Feb 2011 IEEE Approved NGBASE-T Project in July 2011
Draft Timeline for ANSI/TIA-568-C.2-1
TIA Category 8 recent changes Improved channel and connector RL requirements Improved channel and connector IL requirements Improved channel and ANEXT requirements Harmonization with ISO TR 11801-99-1 Class I and Class II
Impact of Category 8 specification Transmission parameters extended to 2 GHz Enables channel, permanent link, cable, connector, and cord specifications vetted by multiple vendors Develops sophisticated modeling to add components into links / channels Eliminate Spikes & Dropouts Creates laboratory and field measurement methods for channels, links, and components Stimulates major advances in copper cabling technology
ISO TR 11801-99-1 channels for 40 G Specifies two new channel classes of up to 30 meter length with two connections characterized up to 1600 MHz (2000 MHz ffs) in support of 40 G applications: Class I based on Category 8.1 specifications (F/UTP construction) Class II based on Category 8.2 specifications (PiMF construction) Class I specifies the IEC 60603-7-81 2 GHz RJ-45 connector Class II will likely use one of 3 connector types: IEC 61076-104-2000 8 pin 2 GHz Connector IEC 61076-110 -2000 8 pin 2 GHz Connector IEC 60603-7-82-2000 12 pin 2 GHz Connector
Recent changes to ISO TR 11801-99-1 Class I is harmonized with TIA Category 8 specifications Class I and Class II are also coming closer in most specifications with differences in: Channel IL (Class I slightly higher due to connector IL) Channel TCL and ELTCTL (Class I is tighter) Channel NEXT, PSNEXT, delay Skew (Class II is tighter) Qualification of existing Category 6A and 7A cabling to support 40GBASE-T was downgraded to a description up to 1600 MHz and moved to an informative annex
IEEE 802.3bq objectives Define a link segment based upon copper media specified by ISO/IEC JTC1/SC25/WG3 and TIA TR42.7 meeting the following characteristics: 4-pair, balanced twisted-pair copper cabling up to 2 connectors up to at least 30 m Define a single 40 Gb/s PHY supporting operation on the link segment Legacy Ethernet requirements (auto-neg, EMC, BER, duplex)
PHY vendors contributing. IEEE 802.3bq task force agreed at the November 2013 plenary meeting to form a PHY proposal ad hoc to work on refining elements of a baseline PHY proposal. Companies expressing interest in contributing to 40GBASE-T PHY (PHY adhoc committee) development include: Broadcom Marvell Aquantia
Standard Structured Cabling Topology Channel (100 m max) Horizontal cable (90 m max) EQ Equipment cord Patch cord CP TO Work area cord Q EQ C Telecommunications Room (TR) Work Area
Category 8 two connection Channel Channel (30m max) Horizontal cable Switch Equipment cord EO Equipment cord C Server End of Row Cabinet or Rack Server Cabinet or Rack 20mtr link 3mtrs each side to drop into rack 2mtr patch cords
Category 8 field tester channel test
Channel is 30 m with 2 connections
Test uses bare wire channel adapters
Category 8 termination detail
Category 8 RJ-45 Mated connection IEC 60603-7-81
Channel IL using network analyzer 40 35 30 25 7,8 1,2 4,5 3,6 Limit (db) 20 15 10 5 0 1 10 100 1000 10000
Channel IL using field tester 40 35 30 25 Limit (db) 1,2 3,6 4,5 7,8 20 15 10 5 0 1 10 100 1000 10000
Channel RL using network analyzer 80 70 60 50 40 30 Series1 Series2 Series3 Series4 Series5 Series6 Series7 Series8 Limit 20 10 0 1 10 100 1000 10000
Channel RL using field tester 80 70 60 50 40 30 Limit (db) 1,2 3,6 4,5 7,8 1,2 3,6 4,5 7,8 20 10 0 1 10 100 1000 10000
Channel NEXT using network analyzer 130 120 110 100 90 80 70 60 50 Series1 Series2 Series3 Series4 Series5 Series6 Series7 Series8 Series9 Series10 Series11 Series12 Limit 40 30 20 10 0 1 10 100 1000 10000
Channel NEXT using field tester 160 140 120 100 80 60 40 Limit (db) 1,2-3,6 1,2-4,5 1,2-7,8 3,6-4,5 3,6-7,8 4,5-7,8 1,2-3,6 1,2-4,5 1,2-7,8 3,6-4,5 3,6-7,8 4,5-7,8 20 0 1 10 100 1000 10000
Channel ACRF using network analyzer 120 100 80 60 40 20 0 1 10 100 1000 10000 Series1 Series2 Series3 Series4 Series5 Series6 Series7 Series8 Series9 Series10 Series11 Series12
Channel ACRF using field tester 140 120 100 80 60 40 20 0 1 10 100 1000 10000 Limit (db) 1,2-7,8 3,6-1,2 4,5-1,2 4,5-3,6 7,8-3,6 7,8-4,5 7,8-1,2 1,2-3,6 1,2-4,5 3,6-4,5 3,6-7,8 4,5-7,8 1,2-7,8 3,6-1,2 4,5-1,2 4,5-3,6 7,8-3,6 7,8-4,5 7,8-1,2 1,2-3,6 1,2-4,5
Channel TCL using network analyzer 70 60 50 40 TCL pair 1 fwd TCL pair 2 fwd TCL pair 3 fwd TCL pair 4 fwd TCL pair 1 rev TCL pair 2 rev TCL pair 3 rev TCL pair 4 rev TCL channel limit 30 20 10 0 0 200 400 600 800 1000 1200 1400 1600 1800 2000
Channel TCTL using network analyzer 100 90 80 70 60 50 40 30 20 10 0 0 500 1000 1500 2000 TCTL pair 1 fwd TCTL pair 2 fwd TCTL pair 3 fwd TCTL pair 4 fwd TCTL pair 1 rev TCTL pair 2 rev TCTL pair 3 rev TCTL pair 4 rev
RJ45 supports 10BASE-T to 40GBASE-T
In Summary IEEE 40GBASE-T has reduced channel length to 30 m and 2 connections to allow 40 Gb/s application speeds sufficient to cover EOR topology in data centers Feasibility, interoperability, and backward compatibility (using the RJ45) of Category 8 channel and component specifications has been demonstrated by multiple vendors Category 8 will provide higher density, lower cost, easy installation, simple administration (MACs), and proven reliability of structured cabling for increased uptime
Thank You dave.hughes@commscope.com