The 10GbE-to-25GbE Migration That Every vSAN Cluster Needs — And Most Are Putting Off
A 4-node vSAN ESA cluster with all-NVMe storage generates approximately 18 Gbps of east-west replication traffic during heavy write workloads. On 10GbE NICs, that traffic saturates both ports — and any additional management or vMotion traffic competes for the same saturated link. The Intel E810-XXVDA2 is a dual-port 25GbE SFP28 adapter that more than doubles the available bandwidth (50 Gbps aggregate vs 20 جيجابت في الثانية) while fitting in the same PCIe slot, same SFP28 cage, and same driver stack as the 10GbE NIC it replaces. It is the NIC upgrade that vSAN, Ceph, and hyperconverged clusters have been waiting for — and at a price point that dropped roughly 40 percent since the E810 launched in 2021.
المواصفات الفنية
| معامل | تخصيص |
|---|---|
| شرائح | Intel Ethernet Controller E810 (Columbiaville) |
| الموانئ | 2x SFP28 (25يحمل), also supports 10GbE and 1GbE via SFP+ optics |
| Host Interface | PCIe 4.0 x8 (64 Gbps — sufficient for 2x 25GbE bidirectional) |
| RDMA | iWARP and RoCE v2 (configurable in firmware, not both simultaneously) |
| SR-IOV | يصل إلى 256 virtual functions per port |
| ADQ (Application Device Queues) | Dedicated hardware queues per application — isolates latency-sensitive workloads |
| DDP (Dynamic Device Personalization) | Reprogram packet processing pipeline for specific protocols (GTP-U, VXLAN, NVGRE without CPU penalty) |
| Stateless Offloads | VXLAN, NVGRE, GENEVE, IP-in-IP, checksum, TSO, LRO |
| قوة | ~8W typical (both ports active, 25يحمل, DAC cables) |
| عامل الشكل | Low-profile PCIe, full-height bracket included |
| Physical | 167 x 69 مم (standard LP PCIe card) |
| كابل | SFP28: DAC passive copper 1-5m, active optical 10-100m. SFP+: 10GbE compatible. |
| دعم نظام التشغيل | VMware ESXI 7.0 U3+, 8.0+ | Windows Server 2019/2022/2025 | RHEL 8.6+/9.x | SLES 15 SP4+ | أوبونتو 20.04/22.04/24.04 |
| Driver | In-box for VMware ESXi 8.0+, RHEL 8.6+, أوبونتو 22.04+. Intel ice driver for older kernels. |
| Compatible Servers | All Dell, xFusion, Lenovo servers with PCIe 4.0 x8+ slot |
| ضمان | 3-year (with server) |
ADQ — The Feature That Separates the E810 from Every Other 25GbE NIC
Application Device Queues (ADQ) is an Intel-exclusive feature that dedicates specific hardware receive queues to specific applications. A Redis instance on CPU core 4 gets its own dedicated NIC queue. A PostgreSQL instance on CPU core 8 gets a different queue. Packets arrive at the application’s memory space without the kernel’s network stack touching them — no context switch, no CPU cache pollution from competing network traffic. For latency-sensitive databases, ADQ reduces P99 tail latency by 40-60 percent compared to standard RSS-based NIC queue distribution. No other 25GbE NIC on the market offers this capability at this price point.
iWARP vs RoCE v2 — When to Choose Which
| Factor | iWARP | RoCE v2 |
|---|---|---|
| Transport | TCP/IP (routable, works across subnets) | UDP/IP + DCB/PFC (lossless Ethernet required) |
| Switch requirements | Any Ethernet switch. No DCB/PFC required. | DCB-capable switch with PFC and ETS enabled. |
| Configuration complexity | Low. Enable iWARP in driver, assign IP, done. | Medium. Requires switch-side PFC buffer tuning. |
| Best for | Cross-subnet, multi-hop, mixed-traffic environments | Single-subnet, dedicated storage fabric, lowest latency |
Compatible Platforms
PCIe 4.0 x8 slot. Compatible with Dell R660, R760, R770, R7715, R860, R960, xFusion 1288H/2288H/2488H/5288/5885H V7, Lenovo ThinkSystem V3/V4. SFP28 ports accept SFP28 DAC, SFP28 SR/LR optics, or SFP+ optics at 10GbE.
Source Through Xincuan
We supply E810-XXVDA2 adapters pre-installed in Dell and xFusion servers. Factory-direct pricing, 3-year warranty, and global shipping.
