Datasheet

Intel
®
82599 10 GbE Controller—Errata
48
Workaround:
This issue is resolved by the 82599 EEPROM Dev Starter rev 4.22 or newer.
Status: B0=Yes; NoFix
56 ETS Resolution
Problem:
IEEE802.1Qaz specification, aka Enhanced Transmission Selection (ETS) for Bandwidth Sharing
Between Traffic Classes, requires ETS resolution of 1% with max allowed deviation of +/- 10% of link
bandwidth.
ETS resolution is defined as the minimum percent of link bandwidth that can be allocated to a specific
traffic class.
In the 82599, if 9.5 KB Jumbo Frames are enabled, the ETS resolution is 12.5%. If 9.5 KB Jumbo
Frames are disabled, ETS resolution is 3.3%.
Implication:
ETS bandwidth allocation limitation and specification conformance.
Workaround:
None.
Status: B0=Yes; NoFix
57 Flow Control and Missed Packets Counters
Limitation
Problem:
When performing back-to-back registers read accesses, the following counters might retrieve an
incorrect value:
RXMPC[n], LXONTXC, LXOFFTXC, PXONTXC[n], PXOFFTXC[n].
Implication:
Incorrect statistics collection.
Workaround:
Add one microsecond delay before/after these registers access.
Status: B0=Yes; NoFix