Jumbo frames are Ethernet frames that are larger than 1518 bytes. You can use Jumbo Frames to reduce server CPU utilization and increase throughput. However, additional latency may be introduced.
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Jumbo Frames can be implemented simultaneously with VLANs and teaming.
To configure Jumbo Frames at the switch, consult your network administrator or switch user's guide.
Restrictions:
Jumbo frames are not supported in multi-vendor team configurations.
Supported protocols are limited to IP (TCP, UDP).
Jumbo frames require compatible switch connections that forward Jumbo Frames. Contact your switch vendor for more information.
When standard sized Ethernet frames (64 to 1518 bytes) are used, there is no benefit to configuring Jumbo Frames.
The Jumbo Frames setting on the switch must be set to at least 8 bytes larger than the adapter setting for Microsoft* Windows* operating systems, and at least 22 bytes larger for all other operating systems.
The Intel® PRO/1000 PL Network Connection supports jumbo frames in Microsoft* Windows* operating systems only when Intel® PROSet for Windows Device Manager is installed.
The following devices do not support jumbo frames larger than 9238 bytes:
Intel® Gigabit EF Dual Port Server Adapter
Intel® 82576 Gigabit Dual Port Server Network Connection
Intel® Gigabit ET Dual Port Server Adapters
Intel® 82576 Gigabit Dual Port Network Connection
Intel® 82567LM-4 Gigabit Network Connection
Intel® 82567LM-3 Gigabit Network Connection
Intel® 82574L Gigabit Network Connection
Intel® Gigabit CT Desktop Adapter
Intel® 82567LM-2 Gigabit Network Connection
Intel® 82567LM Gigabit Network Connection
Intel® Gigabit VT Quad Port Server Adapter
Intel® 82575EB Gigabit Network Connection
Intel® PRO/1000 PF Quad Port Server Adapter
Intel® PRO/1000 PT Quad Port LP Server Adapter
Intel® PRO/1000 PT Quad Port Server Adapter
Intel® PRO/1000 PT Desktop Adapter
Intel® PRO/1000 PT Server Adapter
Intel® PRO/1000 PF Server Adapter
Intel® PRO/1000 PT Network Connection
Intel® PRO/1000 PF Network Connection
Intel® PRO/1000 PB Server Connection
Intel® PRO/1000 PL Network Connection
Intel® PRO/1000 EB Server Connection
Intel® PRO/1000 PF Dual Port Server Adapter
Intel® PRO/1000 PT Dual Port Server Adapter
Intel® PRO/1000 PF Dual Port Server Connection
Intel® PRO/1000 PT Dual Port Network Connection
Intel® 82566DC-2 Gigabit Network Connection
Intel® Gigabit PT Quad Port Server ExpressModule
The following devices do not support jumbo frames:
Intel® 82567LF-3 Gigabit Network Connection
Intel® 82567V-2 Gigabit Network Connection
Intel® 82567LF-2 Gigabit Network Connection
Intel® 82567V Gigabit Network Connection
Intel® 82567LF Gigabit Network Connection
Intel® PRO/1000 Gigabit Server Adapter
Intel® PRO/1000 PM Network Connection
Intel® PRO/1000 PM Network Connection
Intel® 82562V 10/100 Network Connection
Intel® 82562GT 10/100 Network Connection
Intel® 82566DM Gigabit Network Connection
Intel® 82566DC Gigabit Network Connection
Intel® 82566DC-2 Gigabit Network Connection
Intel® 82562V-2 10/100 Gigabit Network Connection
Intel® 82562G-2 10/100 Gigabit Network Connection
Intel® 82562GT-2 10/100 Gigabit Network Connection
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NOTE: Jumbo frames are not supported in multi-vendor team configurations. |
Open Microsoft* Windows* Device Manager.
Open Properties on your adapter.
Click the Advanced tab.
Select Jumbo Frames from the list of advanced features.
Set your desired packet size (based on network capability).
Click OK to apply the changes.
All equipment on the network must also support the larger frame size. When setting up Jumbo Frames on other network devices, be aware that different network devices calculate Jumbo Frame size differently. Some devices include the header information in the frame size while others do not. Intel adapters do not include header information in the frame size. When configuring Jumbo Frames on a switch, set the frame size four bytes higher for CRC, plus four bytes if you are using VLANs or QoS packet tagging.
Last modified on 7/30/08 9:42a Revision 26