Filter
Top Products
Receive Undersize Count - RUC (040A4h; RC) — Intel
®
82575EB Gigabit Ethernet Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 425
14.9.32 Receive Undersize Count - RUC (040A4h; RC)
This register counts the number of received frames that passed address filtering, and were less than
minimum size (64 bytes from <Destination Address> through <CRC>, inclusively), and had a valid
CRC. This register only increments if receives are enabled.
14.9.33 Receive Fragment Count - RFC (040A8h; RC)
This register counts the number of received frames that passed address filtering, and were less than
minimum size (64 bytes from <Destination Address> through <CRC>, inclusively), but had a bad CRC
(this is slightly different from the Receive Undersize Count register). This register only increments if
receives are enabled.
14.9.34 Receive Oversize Count - ROC (040ACh; RC)
This register counts the number of received frames with valid CRC field that passed address filtering,
and were greater than maximum size. Packets over 1522 bytes are oversized if LongPacketEnable
(RCTL.LPE) is 0b. If LongPacketEnable is 1b, then an incoming packet is considered oversized if it
exceeds 16384 bytes.
If receives are not enabled, this register does not increment. These lengths are based on bytes in the
received packet from <Destination Address> through <CRC>, inclusively.
Note: The maximum size of a packet when LPE is 0b is fixed according to the
CTRL_EXT.Extended_VLAN bit and the detection of a VLAN tag in the packet.
14.9.35 Receive Jabber Count - RJC (040B0h; R)
This register counts the number of received frames that passed address filtering, and were greater than
maximum size and had a bad CRC (this is slightly different from the Receive Oversize Count register).
Field Bit(s)
Initial
Value
Description
RNBC 31:0 0b Number of receive no buffer conditions.
Field Bit(s)
Initial
Value
Description
RUC 31:0 0b Number of receive undersize errors.
Field Bit(s)
Initial
Value
Description
RFC 31:0 0b Number of receive fragment errors.
Field Bit(s)
Initial
Value
Description
ROC 31:0 0b Number of receive oversize errors.