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VMware ESXi 3.5 U3 and Broadcom GiB NIC Use 100MB Full Duplex Only

Posted on 2009-04-03
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Last Modified: 2013-11-09
Software:     VMware ESXi 3.5.0 U3
Hardware:    Broadcom NetXtreme II BCM5708 1000Base-T

The problem is VMware will only autonegotiate to 100 Base-T with Full Duplex, even though both the network adapter and the switch support 1000 Base-T.

Forcing the link speed to 1000BT causes the NIC to drop network connection.
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Question by:page1985
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by:65td
ID: 24062019
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za_mkh earned 2000 total points
ID: 24062239
Sometimes, it is the network cable that causes issues. If you have other servers using the same broadcom NIC, etc and they don't have a problem it could just be the cable causing the issue!
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by:page1985
ID: 24065801
65td:  That's the NIC but this server is a 2950, not a 6950.
za:  Confirmed cable was poorly crimped.  Replaced with new cable, problem fixed.
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