Product Overview
Arista offers a broad portfolio of high performance optical transceivers and copper cables for datacenter and campus networks, with speeds ranging from 1G to 800G, and reach from 1m to 80km+. Arista’s Optical Modules and Cable portfolio offer a wide variety of high-density and low-power 800G (dual 400G), 400G, 200G, 100G, 50G, 40G, 25G, 10G, 1G, and 100M Ethernet connectivity options over fiber or copper.
To accommodate an increasing spectrum of applications, Arista offers a wide choice of OSFP, QSFP-DD, QSFP, SFP, SFP-DD and DSFP transceivers and cables that comply with industry standards, offering a broad range of connectivity options. Each module is optimized for different media and reach (ranging from 0.5 meters to 80 kilometers). All interface speeds, from 1G to 400GE have connectivity options that include Direct Attach copper Cables (DACs), Active Optical Cables (AOCs), multi-mode fiber and single-mode fiber transceivers.
Arista Optics Advantages
Supported 25 Gigabit Ethernet SFP Options
Up to 70m link lengths over OM3 multi-mode fiber
Up to 100m link lengths over OM4 multi-mode fiber
Dual rate 10G/25G
Full compliance with 10G-SR and 24G-SR IEEE optical specifications
70m/100m reach at 25G, 300m/400m reach at 10G, over OM3/4
Dual rate 10G/25G
Extended reach at 25G
200m/300m reach at 25G, 300m/400m reach at 10G, over OM3/4
Up to 10km link lengths over single-mode fiber
Dual rate 10G/25G
Up to 10km link lengths over single-mode fiber
Link lengths of 3, 5, 7, 10, 15, 20, 25 and 30m over Active Optical Cables
Supported 25 Gigabit Ethernet CR Cable Options
Link lengths of 1, 2, 3 and 5m over twinax copper cable
Includes 25G SFP connectors on both ends
Link lengths of 1, 2, 3 and 5m over twinax copper cable
Table 1. Arista 25 Gigabit Ethernet SFP25 Optical Specifications
PHY Type | Conn Type | Wave-length (nm) | Cable Type | Core Size (um) | Modal Bandwidth (MHz*Km) | Tx power (dBm) | Rx power (dBm) | Max Reach |
25GBASE-SR | LC | 850 | MMF | 50.0 | 2000 (OM3) 4700 (OM4) | -8.4 to 2.4 | -10.3 to 2.4 | 70m/100m |
25GBASE-MR-SR | -8.4 to 2.4 @ 25G -7.3 to -0.5 @ 10G | -10.3 to 2.4 @ 25G -9.9 to 2.4 @10G | 70m/100m @ 25G 300m/400m @ 10G | |||||
25GBASE-MR-XSR* | -6 to 2.4 | -10.3 to 2.4 | 200m/300m @ 25G 300m/400m @ 10G | |||||
25GBASE-SR-E | -4.5 to 2.4 | -5.9 to 2.4 w/o FEC, or -10.3 to 2.4 w FEC | 30m / 50m w/o FEC, or 70m/100m w FEC | |||||
25GBASE-LR | LC | 1310 | SMF | G.652 | – | -7 to 2.0 | -13.3 to 2.0 | 10km |
25GBASE-MR-LR* | -7 to 2.0 | -13.3 to 2.0 | 10km | |||||
25GBASE-LR-E | -4 to 2.0 | -7.2 to 2.0 w/o FEC, or -13.3 to 2.0 w FEC | 2km w/o FEC, or 10km with FEC | |||||
25GBASE-ER** | -3 to 6 | -21 to -4 | 40km |
* When connecting 25G-MR-XSR/LR optics to legacy fixed rate 10G optics, attenuation may be required to ensure the optical input power to the 10G optical module is within allowable limits.
** Proper optical attenuation is required for shorter links to protect the receiver from permanent damage.
Table 1. Arista 25G Optics Modules and Cables
Part number | Description |
25 Gigabit Ethernet SFP Twinax Copper Cables | |
CAB-S-S-25G-0.5M | 25GBASE-CR SFP to SFP Twinax Copper Cable 0.5 meter |
CAB-S-S-25G-1M | 25GBASE-CR SFP to SFP Twinax Copper Cable 1 meter |
CAB-S-S-25G-1.5M | 25GBASE-CR SFP to SFP Twinax Copper Cable 1.5 meter |
CAB-S-S-25G-2M | 25GBASE-CR SFP to SFP Twinax Copper Cable 2 meter |
CAB-S-S-25G-2.5M | 25GBASE-CR SFP to SFP Twinax Copper Cable 2.5 meter |
CAB-S-S-25G-3M | 25GBASE-CR SFP to SFP Twinax Copper Cable 3 meter |
CAB-S-S-25G-5M | 25GBASE-CR SFP to SFP Twinax Copper Cable 5 meter |
25 Gigabit Ethernet SFP Active Optical Cables | |
AOC-S-S-25G-3M | SFP to SFP 25GbE Active Optical Cable 3 meter |
AOC-S-S-25G-5M | SFP to SFP 25GbE Active Optical Cable 5 meter |
AOC-S-S-25G-7M | SFP to SFP 25GbE Active Optical Cable 7 meter |
AOC-S-S-25G-10M | SFP to SFP 25GbE Active Optical Cable 10 meter |
AOC-S-S-25G-15M | SFP to SFP 25GbE Active Optical Cable 15 meter |
AOC-S-S-25G-20M | SFP to SFP 25GbE Active Optical Cable 20 meter |
AOC-S-S-25G-25M | SFP to SFP 25GbE Active Optical Cable 25 meter |
AOC-S-S-25G-30M | SFP to SFP 25GbE Active Optical Cable 30 meter |
25 Gigabit Ethernet SFP Optics | |
SFP-25G-SR | 25GBASE-SR SFP Transceiver, up to 70m over OM3 MMF or 100m over OM4 MMF |
SFP-25G-MR-SR | 10/25GBASE-MR-SR Dual rate SFP Transceiver, up to 70m/100m over OM3/OM4 MMF at 25G and 300m/400m over OM3/OM4 MMF at 10G. Interoperates with 10G-SR when operated at 10G. |
SFP-25G-MR-XSR* | 10/25GBASE-MR-XSR (Extended Reach) Dual rate SFP Transceiver, up to 200m/300m over OM3/OM4 MMF at 25G and 300m/400m over OM3/OM4 MMF at 10G. |
SFP-25G-SR-E | 25GBASE-SR-Enhanced SFP E-Series Transceiver for low latency, Up to 30m/50m over OM3/OM4 MMF without FEC (for low latency), or Up to 50m/100m over OM3/OM4 MMF with FEC. |
SFP-25G-LR | 25GBASE-LR SFP Transceiver, up to 10 km over duplex SMF |
SFP-25G-MR-LR* | 10/25GBASE-MR-LR Dual rate SFP Transceiver, up to 10 km over duplex SMF |
SFP-25G-LR-E | 25GBASE-LR-Enhanced SFP E-Series Transceiver for low latency, Up to 2km over SMF without FEC (for low latency), or Up to 10km over SMF with FEC |
SFP-25G-ER | 25GBASE-ER SFP Transceiver, up to 40 km over duplex SMF |
* When connecting 25G-MR-XSR/LR optics to legacy fixed rate 10G optics, attenuation may be required to ensure the optical input power to the 10G optical module is within allowable limits. Refer to the relevant 10G-LR / SR optical specifications for requirements.
