# Receive Side Scaling

When Receive Side Scaling (RSS) is enabled, all of the receive data processing for a particular TCP connection is shared across multiple processors or processor cores. Without RSS all of the processing is performed by a single processor, resulting in less efficient system cache utilization.

| NOTES: This setting has no effect if your system has only one processing unit. RSS must be enabled for Intel® I/O Acceleration Technology to function. To enable RSS on Microsoft* Windows Server* 2003, you must install Microsoft's Scalable Networking Pack. The Scalable Networking Pack is part of Windows Server 2003 SP2. It is not included in SP1 and requires a separate download. See http://www.microsoft.com for more information.

## RSS Configuration

RSS is enabled on the Advanced tab of the adapter property sheet. If your adapter does not support RSS, or if your operating system does not support it, the RSS setting will not be displayed.

## Receive Side Scaling Queues

This setting allocates queue space to buffer transactions between the network adapter and CPU(s).

Range | 1 queue is used when low CPU utilization is required. 2 queues are used when good throughput and low CPU utilization are reqruied. 4 queues are used for applications that demand maximum throughput and translations per second. Default setting: 2 queues

## Teaming

- If RSS is not enabled for all adapters in a team, RSS will automatically be disabled for the team.
- If an adapter that does not support RSS is added to a team, RSS will automatically be disabled for the team.
- If a non-Intel adapter is added to a team, RSS will automatically be disabled for the team.
- Non-Intel adapters with RSS enabled cannot be added to a team.