Synology E25G21 Dual-port 25gbe Adapter 5 Year Warranty E25G21-F2

SKU : E25G21-F2
Brand : Synology
Availablity : on order
On Order items usually have to be ordered in and may take bit longer to get them delivered from our Seven Hills, NSW warehouse
Host Bus Interface: PCIe 3.0 x8, Bracket Height: Low Profile and Full Height, Data Transfer Rates: 25 Gbps.
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Product Description

Manufacture # Synology | Model # E25G21-F2


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.



  • Dual-port 25GbE SFP28
  • Optical SR, Optical LR, and DAC support
  • Purpose-built for Synology servers
  • Upgrade Synology systems with faster networking speeds. Thorough validation ensures seamless integration with DSM.
  • Combine the E25G21-F2’s two 25GbE ports into a Link Aggregation group to enable higher simultaneous throughput, port failover, and load balancing.



  • Host Bus Interface: PCIe 3.0 x8
  • Bracket Height: Low Profile and Full Height
  • Data Transfer Rates: 25 Gbps


Manufacturer Warranty: 05 Years Limited Warranty

Technical Specifications

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
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)
Compatibility FS series: FS6400, FS3600, FS3400, FS3017, FS2017, FS1018, FS3410, FS2500
HD series: HD6500
SA series: SA3600, SA3400, SA6400, SA3610, SA3410, SA3200D
UC series: 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

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