andr ás kovács niif /hungarnet [email protected]
DESCRIPTION
Optical technologies: XENPAK, XFP and DWDM. Andr ás Kovács NIIF /HUNGARNET [email protected]. Josef Vojt ě ch CESNET josef.vojtech @ cesnet . cz. XENPAK interface I. MultiSource Agreement (MSA) Group: March, 2001 – open to any organization Initiators: Agilent Technologies + Agere Systems - PowerPoint PPT PresentationTRANSCRIPT
The SEEFIRE project is co-funded by the European Commission under the FP6 IST contract no. 15817
www.seefire.org
SEEFIRE
András KovácsNIIF/HUNGARNET
Optical technologies:XENPAK, XFP and DWDM
Josef VojtěchCESNET
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• MultiSource Agreement (MSA) Group:• March, 2001 – open to any organization• Initiators: Agilent Technologies + Agere Systems• Members > 20• IEEE 802.3ae conform 10GE module definition• Result: “standard”, interchangeable 10GE interface
• MSA covers:• XENPAK spec. for all PHY media defined by IEEE 802.3ae• Physical dimensions• Electrical interface (70-pin) and signal spec.• Optical connector specification (SC)
http://www.xenpak.org
XENPAK interface I.
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• Available XENPAK types:• 10GBase-CX4: copper → 15-20m
• 4x Infiniband connector (no RJ-45)• 10GBase-LX4: MMF/SMF @ 1310nm → 300m/10km
• WWDM (Wide-Wave Divison Multiplexing)• 1x10G multiplexed into 4 wavelengths (4x laser)
• 10GBase-SR: MMF @ 850nm → 26-300m• 10GBase-LR: G.652 SMF @ 1310nm → 10km• 10GBase-ER: G.652 SMF @ 1550nm → 40km
• WAN interfaces: SW, LW, EW• For OC-192/STM-64 compatibility
XENPAK interface II.
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• Physical layout: source – MSA agreement
XENPAK interface III.
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• MultiSource Agreement (MSA) Group:• XFP = 10G Small Form Factor Pluggable Module• March, 2002 – http://www.xfpmsa.org
• Low cost solution• Protocol unaware 10G module definition:
• 10GE• 10G Fiber Channel• OC-192/STM-64 + ITU G.709 OTN
• Small (min. 16x on a 19” router card)• Market driver: high port density
• Lower power cons. and heat emission• Multi rate: 9.95 Gbps - 11.09 Gbps
XFP interface I.
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• Available XFP types:• 10GBase-SR, LR, ER @ 10.31Gbps• 10GBase-SW, LW, EW• 10G FC @ 10.52Gbps• OC-192/STM-64 @ 9.95Gbps• Lower datarates:
• 1000Base-SX, LX• 1G FC: MMF/SMF (1-2x)• OC-48
• Applications:• Server network interface cards• Storage interface, storage arrays, LAN/SAN switch iface
XFP interface II.
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• Physical layout:
XFP interface III.
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XENPAK vs. XFP
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• Dense Wavelength Division Multiplexing:• Multiplexing more optical signals into 1 fiber• Using different wavelengths (ref. as “lambda”)• First deployments: 1998-1999
• Drivers:• Economic use of fiber• Huge aggregated capacity• 100G or beyond using one signal not possible today
DWDM I.
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• Fiber transmission bands:
DWDM II.
Source: Cisco Systems
DWDM systemsS, L, C bands
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• Channel specification:• ITU-T G.692/G.694-1 frequency grid• S, C and L band covered• 200GHz, 100GHz and 50GHz are specified by ITU-T• 100GHz spacing example:
• 0.8nm/channel• 45 channels• Approx. 35nm• Stable equipment available• Can be amplified with a singe amp.
• Commonly used: 100GHz spacing + 4, 8 or 16 channels
DWDM III.
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• Amplifiers:• Signal distorsion:
attenuation/modal dispersion/chromatic dispersion
• 3R: Reamplification/Reshaping/Retiming• Only with OEO today
• Transponder:• Wavelength conversion before/after multiplexing/dempx.• Switch/router interfaces use baseband transmission
850nm, 1310nm or 1550nm → conversion needed
• After conversion: signal fits into the ITU channel grid
DWDM equipment I.
distance
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• Transponders contd.:
• DWDM “colored” GBICs exist (no transp. needed)
DWDM equipment II.
1x DWDM channel
1544nm 1553nm1310nmGBIC
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• Multiplexer/demultiplexer:• Multiplex several wavelengths• Demultiplex several wavelengths
DWDM equipment II.
MP
X
12
3
4
DM
PX
12
34
4321 ,,,
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• Optical Cross Connect (OXC):
• Optical Add Drop Multiplexer (OADM):• Detach and add a wavelength
DWDM equipment III.
OADM4321 ,,, λ 4321 ,,,
3 3
Opt.SW
Opt.SW
1
2
WavelengthMUX
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?András Kovács
http://www.niif.hu