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Certain ixgbe Interfaces Do Not Auto-negotiate to Gigabit Speed with Some Switches (Doc ID 1612145.1)

Last updated on JANUARY 30, 2022

Applies to:

Sun Server X3-2 - Version Not Applicable and later
Sun Server X3-2L - Version Not Applicable and later
Solaris Operating System - Version 10 9/10 U9 and later
SPARC T5-2 - Version All Versions and later
Sun Server X4-2 - Version All Versions and later
Information in this document applies to any platform.


Some on-board ixgbe interfaces on certain x86 and SPARC systems are reported not to link up with 1 Gbit/s speed even if the switch advertizes it. The link is down or the Auto-negotiated link speed stays at 100 Mbit/s instead. This was seen in conjunction with certain switch models.


The symptom was reported with

  • ixgbe on-board interfaces on X3-2 (X4170 M3), X3-2L (X4270-M3), X4-2, X5-2 and T5-2 using the Intel X540 (Twinville) chip set
  • when connected to certain Nortel, Avaya ERS5650TD, Juniper EX4200, HP Pro 6600ml and Extreme Networks x325 switches


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