Maximize Bandwidth for Heavy-Duty Applications
– The Synology E25G21-F2 dual-port 25GbE SFP28 network adapter is designed to support large?scale deployments and high-throughput applications. It lets system administrators maximize the
performance potential of compatible Synology NAS and IP-SAN.

High-performance connectivity upgrade
– The E25G21-F2 adapter gives you more connectivity options with support for SR and LR transceivers and DAC options. Dual 25GbE SFP28 ports help remove network bandwidth limitations, while backwards compatibility
with 10GbE SFP+ equipment reduces installation and implementation costs. CPU offloading technologies reduce network transfer overhead on the host system’s processor to boost system performance

Features
– High Bandwidth: Two 25GbE SFP28 ports support high?performance storage applications
– Flexible SFP28 Options: Support for Optical SR, Optical LR, and DAC modules lets you optimize connectivity for distance or TCO
– Built for Synology by Synology Built and designed for maximum performance and reliability in Synology servers

Specifications
Hardware
– 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

Network
– IEEE Specification Compliance
• IEEE 802.3ae 10Gbps Ethernet
• IEEE 802.3by 25Gbps Ethernet
• IEEE 802.3ad Link Aggregation
– Connector: SFP28
– Data Transfer Rates: 25 Gbps/10 Gbps
– Network Operation mode: Full Duplex
– Supported Features
• Auto-negotiation between 10Gb/s and 25Gb/s
• Support for 1.5 to 9 KB Jumbo Frames
• Offloaded storage over Ethernet
• Non-offloaded storage over Ethernet
• TCP/UDP Checksum Offloading
• Large Send Offload (LSO)
• Generic Receive Offload (GRO)
• Generic Segmentation Offload (GSO)
• TCP Segmentation Offload (TSO)
• Receive Side Scaling (RSS)
• Transmit Side Scaling (TSS)