Datasheet

Errata—Intel

82599 10 GbE Controller

49 KR TXFFE Coefficient Update Is not Possible if

Middle Coefficient Is at Maximum Value

Problem:

During the KR interface startup sequence, the link partner may request the PRESET setting of the

TXFFE coefficients, which sets the maximum value of the middle coefficient c(0). The coefficients are

set correctly, but further requests to adjust the coefficients will fail. The condition is indicated by the

“max, max, max” status response. Any other response from the 82599, including “updated, max,

max”, “max, max, updated” and “updated, max, updated” means that at least one of c(-1) and c(+1)

coefficients are non-zero; this means that c(0) is non-maximum and thus the condition has not been

encountered. The “max” status for c(0) in these responses means that c(0) couldn’t be increased since

it would have violated the PTP requirements.

Normal operation is restored after an INIT request.

Implication:

KR link establishment may fail, or alternatively link may be established but not in the best condition, if

the link partner issues a PRESET request during KR startup.

Workaround:

An updated EEPROM image can be used to enable further adjustments after PRESET by setting a non-

maximum value for c(0) = MAX. Intel recommends that link partner adaption algorithms, which issue

PRESET requests, do not rely on MAX coefficient status response, and never request a c(0) coefficient

increment after a PRESET request.

Workaround implemented in the 82599 Dev_Starter EEPROM v4.09. Contact your Intel representative

to obtain updated EEPROM images.

Status: B0=Yes; NoFix.

50 LED Does not Blink in Invert Mode

Problem:

LEDx_IVRT bit in LEDCTL register (offset 0x00200) is ignored if the respective LEDx_BLINK bit is set.

This issue is relevant only if LEDx_MODE is programmed to one of the modes where LEDx_BLINK is

used (MAC_ACTIVITY, FILTER_ACTIVITY, LINK_UP, LINK_1G, and LINK_10G).

Implication:

LED stays lit during idle time.

Workaround:

If LEDx_IVRT must be set together with a blink effect, use LINK_ACTIVITY mode instead of the modes

using LEDx_BLINK (MAC_ACTIVITY, FILTER_ACTIVITY, LINK_UP, LINK_1G, and LINK_10G).

Status: B0=Yes; NoFix