Supported Speed and Mode - UG1523

Alveo X3522 User Guide (UG1523)

Document ID
UG1523
Release Date
2024-10-18
Revision
1.5 English

X3522 network adapters support 4×10 GbE or 4×25 GbE network connections using DSFP+ standards.

The speed(s) available are those that are also supported by the transceiver module being used:

  • DSFP28 and SFP28 modules typically operate at 25 Gbps or 10 Gbps.
  • SFP+ modules typically only operate at 10 Gbps.

Setting the speed

X3522 adapters have Auto-Negotiation (AN) enabled by default. They automatically detect the link speed and configuration of the link partner (switch), and typically no configuration is necessary:

  • If the link partner/switch also has AN enabled, the adapter determines this from the AN protocol, and uses this to set the speed.
  • If auto-negotiation is disabled or fails, the adapter instead analyzes the received signal using ‘parallel detect’, and establishes a link at the highest available speed.

AMD recommends, in the majority of cases, to configure the link properties on the connected switch port and leave the X3522 adapter in its default state. However, the adapter can also be configured manually if this is required, using the ethtool command.