Datasheet

25
Errata—Intel
®
82599 10 GbE Controller
5 Flow Director Statistics Inaccuracy
Problem:
FDIRMATCH should count the number of packets that matched any flow director filter.
FDIRMISS should count the number of packets that missed matching any flow director filter.
Implication:
The counters cannot be used for exact statistics. Counters should be used as an approximate indication
on miss/match of filters.
Workaround:
None.
Status: B0=Yes; NoFix
6 No Length Error on VLAN Packets with Bad Type/
Length Field
Problem:
Device will not assert length error for VLAN packets that have a bad type/length field in the MAC
header.
Implication:
No impact on system level performance. The packets are posted to the host as any other packets.
Workaround:
None.
Status: B0=Yes; NoFix
7 GPRC and GORCL/H Also Count Missed Packets
Problem:
GPRC (Good Packets Received Count) and GORCL/H (Good Octets Received Count) count missed
packets and missed packets bytes; this is not consistent with previous products.
Implication:
None.
Workaround:
Statistics are available indirectly for these registers. This workaround is included in Intel drivers.
• For GPRC — Subtract MPC (Missed Packet Count) from GPRC. Alternatively, use QPRC.
• For GORCL/H — use QBRCL/H (Quad Bytes Received).
Status: B0=Yes; NoFix