Jumbo Frames

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. 

NOTES:
  • Jumbo Frames are supported at 1000 Mbps and 10Gbps. Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or loss of link.

  • End-to-end network hardware must support this capability; otherwise, packets will be dropped.

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:

Setting Up Jumbo Frames in Microsoft* Windows*

NOTE: Jumbo frames are not supported in multi-vendor team configurations.
  1. Open Microsoft* Windows* Device Manager.

  2. Open Properties on your adapter.

  3. Click the Advanced tab.

  4. Select Jumbo Frames from the list of advanced features.

  5. Set your desired packet size (based on network capability).

  6. 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 12/16/09 1:29p Revision 34