82576EB Datasheet, PDF (24/34 Pages) Intel Corporation – LAN Access Division

Errata - Intel^® 82576EB GbE Controller
12. Time SYNC: Reserved Bits Must Be Zero In PTP Header
Problem:
Receiver expects the reserved bits located in octet 1’s high nibble part of PTP message
header to be zero; future compatibility could be an issue if the specification changes and
uses those bits.
Implication: Specification violation. If these reserved bits are changed in future specifications, there
could be an issue.
Workaround: None.
Status:
A1, A2 NoFix
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13. Internal Copper PHY: No Link In Forced Mode
Problem: Link may fail if Auto MDI-X is enabled during forced 100BASE-TX mode operation.
Implication: Disable Auto MDI-X for Forced 100BASE-TX operation.
Workaround: Since the 82576 does not disable this function automatically, drivers must perform this
step. Auto MDI-X can be disabled by clearing PHYREG18.12. Intel software drivers are
implemented this way.
Status:
A1, A2 NoFix
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14. Duplicate. See 18.
15. Internal Copper PHY: IEEE 1411.10.03 – 10BASE-T Harmonic Content Fails at Low Voltage
Problem:
IEEE 1411.10.03 – 10BASE-T harmonic content fails at low voltage and the results are <
27dBC.
Implication: None. Specification violation.
Workaround: None.
Status:
A1, A2 NoFix
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16. NC-SI: Additional Multicast Packets May Be Forwarded To MC
Problem:
If the MC enables Multicast filtering for IPv6 Neighbor Advertisement and/or IPv6 Router
Advertisement, additional multicast packets will be forwarded to the MC. The additional
packets forwarded are:
1. Packets with the ICMPv6 header's Message Type: 135,137
2. IPv6 Neighbor Advertisement
3. IPv6 Router Advertisement
Implication: Additional packets may be forwarded to the MC.
Workaround: The MC should filter the different multicast packets.
Intel^® 82576EB GbE Controller
Specification Update
24
Revision: 2.85
September 2012