Datasheet

19
Specification Clarifications—Intel
®
82599 10 GbE Controller
13 82599 SFP+ Receiver Specification Conforms to
SFF-8431
The 82599 SFI interface supports the electrical specification defined in the SFI+ MSA (SFF Committee
SFF-8431). The 82599 SFI receiver is conformant with the SFI receiver specification, and expects the
transmitted signal to comply with the SFF-8431 electrical specification listed in SFF-8431 3.51 Table 11
and Table 12. Establishing an SFI link with a link partner whose transmitter is non-conformant with this
specification might result in link issues, such as link instability and/or Bit Error Rate (BER) failures.
If link issues are observed, it might be due to violations of the Eye Mask electrical specifications in Table
12 by the link partner of the 82599. In this case, Intel recommends tuning the Link Partner’s SFI
Transmitter signal to be within the range allowed in the SFF-8431 specification. If the Link Partner's SFI
Transmitter is not tunable and exceeds the amplitude specification, Intel recommends the use of a
lossier medium (such as a longer Direct Attach cable) to provide additional attenuation and thereby
attempt to provide a recoverable signal to the 82599 receiver.
14 SR-IOV and Jumbo Frames Support in 82599
To enable Jumbo Frame support with SR-IOV enabled, the Physical Function (PF) and the Virtual
Function (VF) must be configured to the same maximum frame size. Additionally, the jumbo frame has
a maximum size of 9 KB. Software drivers requiring support for Jumbo Frames in SR-IOV must account
for this. SR-IOV and Jumbo Frames are supported in the 82599 on both Linux and Microsoft Windows
Server operating systems with Intel software drivers.
• Linux Support: Support started with PF (ixgbe 3.15.1) and VF (ixgbevf 2.8.7) drivers available
from Intel’s Open Source Driver site (http://sourceforge.net/projects/e1000/files/) and the Linux
kernel version 3.2 or newer.
• Microsoft Windows Server Support: Supported with Microsoft Windows Server 2012 family starting
with Intel Driver Release 18.3 available at http://support.intel.com.
15 VLAN Anti-spoof Filter of an Untagged Packet
The VLAN anti-spoofing capability insures that a VM always uses a VLAN tag that is part of the set of
VLAN tags defined on the Rx path. A Tx packet with a non-matching VLAN tag is dropped, preventing
spoofing of the VLAN tag.
Note: An untagged packet is dropped.
16 SR-IOV Prefetchable Address Space
In SR-IOV mode, memory space should be allocated to the multiple VFs enabled. To accommodate the
full extent of possible memory allocation, 64-bit addressing should be used. The PCI bridge
specification requires that a 64-bit BAR be prefetchable.
The “prefetchable” bit at IOV Control Word has been set in the NVM Dev Starter releases since Revision
3.13. To obtain an updated EEPROM image, please contact your Intel representative.