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E25G21-F2

Dual-port SFP28 add-in card designed to accelerate bandwidth-intensive workflows

E25G21_F2
E25G21_F2

Maximize Bandwidth for Heavy-Duty Applications

The Synology E25G21-F2 is a dual-port 25GbE SFP28 network interface card that lets you boost network bandwidth and performance. Handle higher quantities of data traffic for increased users and the most data-intensive workloads.

Throughput

Throughput

Dual-port 25GbE SFP28

Flexibility

Flexibility

Optical SR, Optical LR, and DAC support

Compatibility

Compatibility

Purpose-built for Synology servers

5-year warranty

5-year warranty

At Synology, we are committed to product innovation and quality. Synology guarantees a robust and reliable data management experience with a 5-year limited warranty, providing responsive technical support and hardware replacement services to maximize your return on investment.

High performance storage systems

All-flash array

FS6400

FS6400
  • 240,000 4K random write IOPS
  • Dual 8-core 2.1 GHz CPU
  • Synology RAID F1 for flash storage endurance
Learn more
High Scalability

SA3600

SA3600
  • 12-core CPU Turbo Boost up to 2.7 GHz
  • Over 5,500 MB/s sequential throughput reading
  • Scale up to 180/96 drives
Learn more
RackStation

RS4021xs+

RS4021xs+
  • Over 234,698 4K random read IOPS
  • Built-in dual 10GbE ports
  • Up to 40 bays with RX1217(RP)
Learn more
Hardware Specifications
General
General
 Host Bus Interface PCIe 3.0 x8
Bracket Height Low Profile and Full Height
Size (Height x Width x Depth) 69 mm x 168 mm x 17.3 mm
Operating Temperature 0°C to 40°C (32°F to 104°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH
Warranty 5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Network
Network
 IEEE Specification Compliance
  • IEEE 802.3ad Link Aggregation
  • IEEE 802.3ae 10Gbps Ethernet
  • IEEE 802.3by 25Gbps Ethernet
Data Transfer Rates 25 Gbps
Supported Features
  • TCP Segmentation Offload (TSO)
  • Large Send Offload (LSO)
  • Receive Side Scaling (RSS)
  • Generic Receive Offload (GRO)
  • Generic Segmentation Offload (GSO)
  • 1.5 - 9 KB Jumbo Frame
  • Offloaded storage over Ethernet
  • Non-offloaded storage over Ethernet
  • Auto-negotiation between 10Gb/s and 25Gb/s
  • TCP/UDP Checksum Offload
  • Transmit side scaling (TSS)
  • SR-IOV
Compatibility
Applied Models
Applied Models
  • FS series:FS6400, FS3600, FS3400, FS3017, FS2017, FS1018, FS3410, FS2500
  • HD series:HD6500
  • SA series:SA3600, SA3400, SA6400, SA3610, SA3410, SA3400D, SA3200D
  • UC series:UC3400, UC3200
  • 23 series:RS2423RP+, RS2423+, DS1823xs+
  • 22 series:RS822RP+, RS822+, DS3622xs+, DS2422+
  • 21 series:RS4021xs+, RS3621xs+, RS3621RPxs, RS2821RP+, RS2421RP+, RS2421+, RS1221RP+, RS1221+, DS1821+, DS1621xs+, DS1621+
  • 19 series:RS1619xs+
  • 18 series:RS3618xs, DS3018xs
  • 17 series:RS18017xs+, RS4017xs+, RS3617xs+, RS3617RPxs, DS3617xs, DS3617xsII
Notes
  • DSM version requirement: 6.2.3-25426 or later version
  • SR-IOV support requires DSM 7.1.1-42962 and is not available on the following units: UC3200, FS3410, FS3017, SA3200D, and DS1621+.

Notes:

  1. Model specifications are subject to change without prior notice.
  2. The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
  3. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
  4. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.