# Other Advanced Features

Jumbo Frames

Quality of Service (QoS)

WMI Management Software Support

## Jumbo Frames

Jumbo Frames are Ethernet frames which are larger than 1518 bytes, that can be used to reduce server CPU utilization and improve wire efficiency of the entire network.

By putting more data in fewer packets, Jumbo Frames can increase throughput and decrease CPU utilization. However, additional latency may be introduced.

Jumbo Frame support is available with Windows* XP, and Linux*. End-to-end network hardware must support this capability in order to utilize it.

To configure jumbo frames at the switch, consult your network administrator or switch user's guide.

- Supported protocols are limited to IP (TCP, UDP).

- Jumbo Frames require compatible hardware and clients that receive/forward Jumbo Frames . Contact your hardware vendor for more information.

- Configuring Jumbo Frames is a manual process. Unlike auto-negotiation, there is no method of indicating Jumbo Frame support between switches and servers.

| NOTE: The jumbo frame setting at the switch must be set to at least 22 bytes larger than the adapter setting.

### Configuration for Windows XP

To configure Jumbo Frames, start Intel® PROSet II and click the Advanced tab. Select Jumbo Frames from the list of functions and configure it to "Enabled" in the value field. You must set your desired packet size (based on network capability). Common sizes are displayed, but the entire range (1,500-16,000 bytes) is available in the Windows registry.

### Configuration for Linux

See the Linux documentation.

## Quality of Service (QoS)

QoS allows the adapter to send and receive IEEE 802.3ac tagged frames. 802.3ac tagged frames include 802.1p Priority tagged frames and 802.1Q VLAN tagged frames. In order to implement QoS, the adapter must be connected to a switch that supports and is configured for 802.1p and/or 802.1Q QoS. Priority tagged frames allow real-time programs to make the most efficient use of network bandwidth. High priority packets are processed before lower priority packets. VLAN tagging and configuration is discussed in the Advanced Network Services VLAN help section.

In order to implement QoS, the adapter must be connected to a switch that supports 802.1p QoS.

At this time, Intel PRO/1000 adapters support QoS only with Microsoft Windows 2000.

| NOTE: Intel's first generation PRO/1000 Gigabit Server Adapter (PWLA 8490) does not support QoS frame tagging.

QoS is enabled and disabled in the "Advanced Settings" tab of the Intel PROSet control panel utility. You must set this option to "Enabled".

Once QoS is enabled in Intel PROSet, you can specify levels of priority based on IEEE 802.1p/802.1Q frame tagging.

Windows 2000 has its own utility for 802.1p packet prioritization. For more information on the Windows 2000 utility, see the Windows 2000 system help. Use the "Index" tab and search for the term "QoS". Select the topic "Windows 2000 Administration Tools."

Additional information is available at the QoS WMI Provider page.

## WMI Management Software Support

he WMI Provider for 64-bit operating systems can be installed using setup.exe in the \WINDOWS\WMI\NIC\ITANIUM directory (Adapter version). Additional information is available at the WMI for Itanium page.

| NOTE: WMI instrumentation does not support VLANs.

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