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Why 25G Transceiver Choices?

March 14 2018 , Written by Cisco & Cisco Router, Network Switch Published on #Networking, #Cisco Transceiver Modules, #Data Center, #Cisco Modules & Cards, #Cisco & Cisco Network, #IT, #Technology

25G Speeds Up Data Centers and Campus Backbones NOW. With the massive increase in demand for data, equipment providers are responding with 25Gbps edge devices that require more bandwidth than can be provided on a traditional 10Gbps interface.

Whether it’s a server or a campus backbone, high speed data needs to be delivered cost-effectively in a small and low-power package.

In these bandwidth-intensive applications, the choice to go with 25G is clear. To get the same or better bandwidth, the number of 10G interfaces must be 3x (6x for redundancy) or the application needs to move to the larger, more expensive and power-hungry 40G QSFP.

SFP28: For 25G the dominant form factor is SFP28. The SFP28 standard relies on the 10G SFP+ (Small Form Factor Pluggable) standard for mechanical specifications, and the electrical specifications have been improved from one 10Gbps lane that operates at 10.312Gbps to one 28Gbps lane that operates at 25Gbps + error correction. 25G transceivers can be plugged into SFP+ sockets and 10G transceivers can be plugged into SFP28 sockets because they have the same electrical and mechanical pin-out, however the associated host needs to have the software support for associated devices.

Cisco’s 25G transceiver choices include 25G Copper DAC (Direct Attached Cables), 25G AOC (Active Optical Cables) and 25G SR-S (Short Reach) transceivers.

These 25G devices are plugged into Cisco’s data center, campus and service provider switches and routers to provide high speed 25Gbps connectivity. See Cisco’s 25G compatibility matrix for currently supported devices .

Why DAC?

25G DACs are generally used in data center applications and provide the lowest cost fixed length interconnect for TOR (Top of Rack) switches to high-performance servers.  Depending upon the bandwidth and distance, DACs can be either passive or active and are generally based on Twin-AX cable.  For 25G, DACs can generally operate up to 5 meters without active components in the data path. Up to 2 meters, no FEC (Forward Error Correction) is needed. For 3 meters FC-FEC (Fire Code Forward Error Correction) is needed, and for 5 meters RS-FEC (Reed Solomon Forward Error Correction) is needed to correct errors.  Generally, at 25Gbps beyond 5 meters, active components are needed in the data path to amplify and correct the signal.  These components drive up cost which causes network designers to consider optical interfaces.

Why AOC?

25G AOCs also provide a cost effect solution for those same data center applications that require longer distances than 5m. Generally, AOCs are provided in standard lengths of 1m, 2m, 3m, 5m and 10m. However, they are usually limited to about 25 meters because of inventory stock and slack storage issues. Often a data center will be wired with only AOCs for consistency reasons, instead of a combination of AOCs and DACs.

Why SR?

25G-SR is used with standard OM3 or OM4 multimode fiber and is suitable for:

• Data centers that require up 100 meters over OM4 fiber or 70 meters over OM3 fiber for interconnect between TOR switches and leaf or spine switches.

• Breakout configurations in conjunction with 100G-SR4 transceivers where the distances are less than 100 meters for OM4 fiber or 70 meters for OM3 fiber.

• Campus backbones, where the distances between distribution and aggregation switches are less than 100 meters for OM4 fiber or 70 meters for OM3 fiber.

Learn more about how Cisco’s 25G transceiver products are transforming the industry here

Original article from https://blogs.cisco.com/sp/too-slow-25g-speeds-up-data-centers-and-campus-backbones

 

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The Latest Updated: SFP Modules for Cisco Catalyst 2960-X Series Switches

January 12 2018 , Written by Cisco & Cisco Router, Network Switch Published on #Cisco Switches - Cisco Firewall, #Cisco & Cisco Network, #Cisco Modules & Cards, #Networking

We are so familiar with the hot Catalyst 2960-X series, and what are the SFP Transceiver Models for 2960 X Series? Check the table below about the latest SFP models for 2960 X Series.

Catalyst 2960 X Series

Network Device

Transceiver Model

Minimum Software Release Required

DOM Support

Software Release

WS-C2960X-24TS-LL
WS-C2960X-48TS-LL

GLC-LH-SMD
GLC-SX-MMD
GLC-EX-SMD1
GLC-T
GLC-TE
GLC-LH-SM
GLC-SX-MM
GLC-GE-100FX

15.0(2)EX

15.0(2)EX

WS-C2960X-24PSQ-L

GLC-BX-D
GLC-BX-U
GLC-LH-SMD
GLC-SX-MMD
GLC-EX-SMD1
GLC-ZX-SMD
GLC-T
GLC-TE
GLC-ZX-SM
GLC-LH-SM
GLC-SX-MM

15.0(2)EX

15.0(2)EX

WS-C2960X-24PS-L
WS-C2960X-24TS-L
WS-C2960X-48TS-L
WS-C2960X-48LPS-L
WS-C2960X-48FPS-L
WS-C2960X-24TD-L
WS-C2960X-24PD-L
WS-C2960X-48TD-L
WS-C2960X-48LPD-L
WS-C2960X-48FPD-L

GLC-BX-D
GLC-BX-U
GLC-LH-SMD
GLC-SX-MMD
GLC-EX-SMD1
GLC-ZX-SMD
GLC-T
GLC-TE
GLC-ZX-SM
GLC-LH-SM
GLC-SX-MM
CWDM-SFP
GLC-GE-100FX

15.0(2)EX

15.0(2)EX

 

SFP Transceivers

Model Number

Transceiver Description

GLC-T=

1000BASE-T SFP transceiver module for Category 5 copper wire, RJ-45 connector

GLC-TE=

1000BASE-T SFP transceiver module for Category 5 copper wire, RJ-45 connector, Extended Temperature

GLC-SX-MM=

1000BASE-SX SFP transceiver module for MMF, 850-nm wavelength, dual LC/PC connector

GLC-LH-SM=

1000BASE-LX/LH SFP transceiver module for MMF and SMF, 1300-nm wavelength, dual LC/PC connector

GLC-ZX-SM=

1000BASE-ZX SFP transceiver module for SMF, 1550-nm wavelength, dual LC/PC connector

GLC-BX-D=

1000BASE-BX10 SFP module for single-strand SMF, 1490-nm TX/1310-nm RX wavelength, single LC/PC connector

GLC-BX-U=

1000BASE-BX10 SFP module for single-strand SMF, 1310-nm TX/1490-nm RX wavelength, single LC/PC connector

GLC-BX40-D-I

1000BASE-BX10 SFP module for single-strand SMF, 1550-nm TX/1310-nm RX wavelength, single LC/PC connector

GLC-BX40-U-I

1000BASE-BX10 SFP module for single-strand SMF, 1310-nm TX/1550-nm RX wavelength, single LC/PC connector

GLC-BX80-D-I

1000BASE-BX10 SFP module for single-strand SMF, 1570-nm TX/1490-nm RX wavelength, single LC/PC connector

GLC-BX80-U-I

1000BASE-BX10 SFP module for single-strand SMF, 1490-nm TX/1570-nm RX wavelength, single LC/PC connector

GLC-BX40-DA-I

1000BASE-BX10 SFP module for single-strand SMF, 1490-nm TX/1310-nm RX wavelength, single LC/PC connector

GLC-2BX-D=

Dual-channel 1000BASE-BX10 SFP module for single-strand SMF, 1490-nm TX/1310-nm RX wavelength, two single LC/PC connectors

SFP-GE-S=

1000BASE-SX SFP transceiver module for MMF, 850-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector

SFP-GE-L=

1000BASE-LX/LH SFP transceiver module for MMF and SMF, 1300-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector

GLC-EX-SMD=

1000BASE-EX SFP transceiver module for SMF, 1310-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector

SFP-GE-Z=

1000BASE-ZX SFP transceiver module for SMF, 1550-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector

SFP-GE-T=

1000BASE-T SFP transceiver module for Category 5 copper wire, extended operating temperature range, RJ-45 connector

GLC-SX-MM-RGD

1000BASE-SX SFP transceiver module for MMF, 850-nm wavelength, industrial Ethernet, dual LC/PC connector

GLC-LX-SM-RGD

1000BASE-LX/LH SFP transceiver module for MMF and SMF, 1300-nm wavelength, industrial Ethernet, dual LC/PC connector

GLC-ZX-SM-RGD

1000BASE-ZX SFP transceiver module for SMF, 1550-nm wavelength, industrial Ethernet, dual LC/PC connector

GLC-SX-MMD=

1000BASE-SX SFP transceiver module for MMF, 850-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector

GLC-LH-SMD=

1000BASE-LX/LH SFP transceiver module for MMF and SMF, 1300-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector

GLC-ZX-SMD=

1000BASE-ZX SFP transceiver module for SMF, 1550-nm wavelength, dual LC/PC connector

SFP-GPON-B

Gigabit passive optical network (GPON) Class B+ SFP OLT transceiver module, 1490-nm TX/1310-nm RX wavelength

SFP-GPON-B-I

Gigabit passive optical network (GPON) Class B+ SFP OLT transceiver module, 1490-nm TX/1310-nm RX wavelength, industrial temperature range

SFP-GPON-C

Gigabit passive optical network (GPON) Class C+ SFP OLT transceiver module, 1490-nm TX/1310-nm RX wavelength

SFP-GPON-C-I

Gigabit passive optical network (GPON) Class C+ SFP OLT transceiver module, 1490-nm TX/1310-nm RX wavelength, industrial temperature range

1CPN 10-2624-01 or later only.

The full data sheet of Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix you can visit here:

https://www.cisco.com/c/en/us/td/docs/interfaces_modules/transceiver_modules/compatibility/matrix/GE_Tx_Matrix.html

 

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New Catalyst Performance of Cisco Switch Engines

February 22 2016 , Written by Cisco & Cisco Router, Network Switch Published on #Cisco Switches - Cisco Firewall, #Cisco Modules & Cards

Cisco Catalyst 4500E Supervisor Engine 8L-E

Cisco Catalyst 4500E Supervisor Engine 8L-E

To Read the Cisco Catalyst 4500E Supervisor Engine 8L-E

To Read the Cisco Catalyst 4500E Supervisor Engine 8L-E

Cisco introduced two supervisor engines last week--the 6T and 8L-E. The former is for the Catalyst 6700, 6800 and 6900 series, while Cisco has aimed the latter at the Catalyst 4500E.

Both switch engines are scheduled to ship in April.

Read more about the Updated: Cisco Catalyst 4500 Supervisor Engine 8-E and 8L-E & Introducing Cisco Catalyst 6800 Series Supervisor Engine 6T

In general, the Catalyst switches are designed for the campus backbone, the wiring closet, or a small office or retail network. Switch engines, which are the brains of the Catalyst, extend the usefulness of the hardware as application-driven network traffic rises.

The 6T raises speeds to 400 Gbps per slot on the Catalyst 6807-XL chassis. As a result, the supervisor engine can increase switch capacity to 6 Tbps and scale to 12 Tbps when in the Virtual Switching System configuration. The Supervisor Engine 6T is compatible with 10 Gb, 40 Gb and 100 Gb line cards, and has 8 x 10 GbE and 2 x 40 GbE uplinks to support high-performance applications.

The 8L-E has up to 560 Gbps of wired switching capacity and can handle independent packets simultaneously at a rate of 48 Gbps. The extension has four 10 GbE uplinks.

Cisco upgrades wireless, UCS platforms

With the latest switch engines, Cisco introduced the Catalyst 3650-Mini for companies with space-constrained locations. The hardware mirrors the 3650 family of switches in a 1RU form factor. It's available with 24 or 48 fixed PoE+ GbE ports.

For wireless networks, Cisco introduced 802.11ac Wave 2 access points under the Aironet and cloud-managed Meraki brands. The company also introduced stackable Meraki MS Switches that feature 16 or 32 1 Gbps ports, and hot-swappable power supplies and fans.

The Catalyst and wireless network upgrades reflect Cisco's two-prong product strategy of strengthening its on-premises and cloud-managed technology, which also includes security, said Rohit Mehra, an analyst at IDC. By focusing on both, Cisco is bolstering its core platforms for switching and routing, while also addressing the needs of the "midmarket, distributed enterprise that is developing a greater affinity for leveraging cloud for IT infrastructure."

For the data center, Cisco introduced the 6300 Series Fabric Interconnect for the company's Unified Computing System (UCS), which combines compute, storage and networking into a single platform. Cisco's fabric interconnects provide the management and communication backbone of the UCS B-Series Blade Servers, 5100 Series Blade Server Chassis and the C-Series Rack Servers.

The 6300 Series features two 1RU 40 GbE switches and a 40 GbE Fabric Extender. The products leverage the Virtual Interface Card 1300 series, which is designed to support up to 40 GbE networks. The card supports network overlay technologies, such as VXLAN.

The Article from http://searchnetworking.techtarget.com/news/4500272897/Cisco-switch-engines-boost-Catalyst-performance

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Migrate to a 40-Gbps Data Center…with Cisco QSFP BiDi Technology

June 10 2015 , Written by Cisco & Cisco Router, Network Switch Published on #Networking, #Cisco Modules & Cards

Cisco40G BiDi

Cisco40G BiDi

Cisco’s QSFP 40G BiDi (bidirectional) transceiver, allows zero-cost fiber migration by reusing the current 10-Gbit/sec cabling for 40-Gbit/sec device connectivity. With duplex LC ports, it enables 100 meters of 40G transmission over OM3, 125 meters over OM4 fiber, and 150 meters over certain “OM4+” fibers.

Migrate to a 40-Gbps Data Center with Cisco QSSFP BiDi Technology? Cisco makes the case for its transceiver technology, taking direct aim at “the need for a major upgrade of the cabling infrastructure” when transitioning from 10G to 40G, “which can be too expensive or disruptive to allow data centers to quickly adopt and migrate to the 40-Gbit/sec technology.”

“Existing short-reach transceivers for 40-Gbit/sec connectivity in a QSFP form factor … use independent transmitter and receiver sections, each with 4 parallel fiber strands. For a duplex 40-Gbit/sec connection, 8 fiber strands are required.

Both QSFP SR4 and QSFP CRS4 use MPO 12-fiber connectors. As a result, 4 fiber strands in each connection are wasted.

“With existing QSFP transceivers, each direct connection between two devices requires an MPO-to-MPO 12-fiber cable. In the case of structured cabling with patch panels and fiber trunks, a 40-Gbit/sec connection needs MPO-to-MPO fibers between devices and patch panels, and 4 duplex multimode fibers in the fiber trunk.

“In most of today’s data center networks, the aggregation fiber infrastructure is built for 10Gbit/sec connectivity that either supports direct connections between devices over LC-to-LC multimode fiber or uses LC-to-LC fibers to attach devices to patch panels and provides one duplex multimode fiber in the fiber trunk for each 10-Gbit/sec connection.

“40-Gbit/sec connectivity using traditional 40-Gbit/sec transceivers cannot reuse directly connecting LC-to-LC fibers. It also requires four to six times greater fiber density in the fiber trunks to meet the requirements of a 40-Gbit/sec connection. These characteristics make it expensive for customers to migrate from 10-Gbit/sec connectivity to 40-Gbit/sec connectivity in their existing data centers.

“The Cisco QSFP BiDi transceiver addresses the challenges of fiber infrastructure by providing the capability to transmit full-duplex 40 traffic over one duplex multimode fiber cable with LC connectors. In other words, the Cisco QSFP BiDi transceiver allows 40-Gbit/sec connectivity to reuse the existing directly connecting 10-Gbit/sec fibers and the existing fiber trunk without the need to add any fibers.”

The technical paper details two deployment scenarios/case studies to emphasize the savings accomplished by eliminating the parallel-optic cabling infrastructure. The first scenario is a 288x40G setup with unstructured cabling. The second is a 384x40G setup with structured cabling. In this second scenario, the paper explains, “Cisco QSFP BiDi technology allows the existing cabling system—including the patch cables, patch panels with MTP/MPO LC modules, and fiber trunks—to be repurposed for 40-Gbit/sec connectivity. In contrast, QSFP SR4 transceivers require new patch cables and patch panels because the connector types differ and the size of the fiber trunk needs to be quadrupled.”

From http://www.cablinginstall.com/articles/2014/03/cisco-qsfp-bidi.html

Migrate to a 40-Gbps Data Center with Cisco QSFP BiDi Technology” you can read the full paper report at

http://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-switches/white-paper-c11-729493.pdf

More benefits you can get from migrating to 40-Gbps Data Center with Cisco QSFP BiDi Technology

Benefits

• Reuse existing 10GE fiber infrastructure for 40GE migration

• Lower CapEx and installation labor costs

• Minimal disruption to the data center during migration

• Four times the bandwidth over the same fiber plant

• Up to 70% savings over other current solutions

Cisco’s innovative 40-Gbps Quad Small Form-Factor Pluggable (QSFP) bidirectional (BiDi) transceiver is a pluggable optical transceiver with a duplex LC connector interface for short-reach data communication and interconnect applications. By using the existing 10 Gigabit Ethernet duplex MMF fiber infrastructure for 40 Gigabit Ethernet, the Cisco BiDi transceiver offers significant cost savings and simplifies data center upgrading.

The Cisco BiDi transceiver supports link lengths of 100m and 150m on laser-optimized OM3 and OM4 multimode fibers. It complies with the QSFP MSA specification, enabling customers to use it on all QSFP 40-Gbps platforms to achieve high-density 40 Gigabit Ethernet networks.

Use Your Existing 10 Gigabit Ethernet Fiber for 40 Gigabit Ethernet

Whether your cable plant is structured or unstructured, Cisco’s BiDi transceiver delivers significant savings and a smooth migration to 40 Gigabit Ethernet. The Cisco BiDi transceiver enables the use of an existing 10 Gigabit Ethernet fiber plant infrastructure for 40 Gigabit Ethernet, delivering four times the bandwidth over the same fiber plant and up to 70% savings over other current solutions.

For building out new data centers, deploying 40 Gigabit Ethernet for aggregation and core is no longer an option but a requirement to meet today’s data demands. Designing new cable plants using Cisco’s BiDi transceivers offers:

• 75% less fiber and MPO requirements

• Reduced cable sprawl and rack footprints

• Cost savings with the industry’s lowest-priced 40 Gigabit Ethernet transceiver

•Investment protection with future support for 100 Gbps over duplex fiber

Designing your new fiber cable plant with Cisco’s 40 Gigabit Ethernet BiDi transceiver allows you to reduce your fiber requirements and CapEx and OpEx while future proofing your data center for 100 Gigabit Ethernet.

Cisco’s QSFP 40 Gigabit Ethernet BiDi technology removes 40-Gbps cabling cost barriers for migration from 10-Gbps to 40-Gbps connectivity in data center networks. Cisco’s BiDi transceivers provide simpler and less expensive 40-Gbps connectivity compared to other 40-Gbps transceiver solutions. The Cisco QSFP BiDi transceiver allows organizations to migrate their existing 10-Gbps cabling infrastructure to 40 Gbps with little capital investment.

http://www.cisco.com/c/dam/en/us/products/collateral/interfaces-modules/40-gigabit-modules/at-a-glance-c45-732908.pdf

More Related: Move to 40G Today? Yes!

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