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8 Replies Last post: Nov 11, 2009 12:31 AM by yito  

Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps. posted: Nov 5, 2009 10:37 PM

Click to view yito's profile Novice
yito
5 posts since
Apr 8, 2008

Hi,

I installed ESXi4 in Dell Optiplex 740.

However, the link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

tg3 Driver 3.86 are applied.

I already tried this KB.
However, I cannot change it.

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1004089&sliceId=1&docTypeID=DT_KB_1_1&dialogID=46412391&stateId=0%200%2046414045

Teach a method to change into 1000mbps.
Any idea?

Tags: esxi4, network, problem

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

1. Nov 5, 2009 11:10 PM in response to: yito
Click to view AndreTheGiant's profile Guru
AndreTheGiant
5,916 posts since
Aug 28, 2008
Be sure that you are using a good cable and that the switch is configured in autonegotiation.
On the switch side what did you see? Have you tested your port so be sure that works fine with 1Gbps?

Andre

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

2. Nov 5, 2009 11:24 PM in response to: AndreTheGiant
Click to view yito's profile Novice
yito
5 posts since
Apr 8, 2008

Hi,Andre

Hub becomes AutoNegotiation.

The cable does not have any problem, too.

I installed Intel 1000 MT Server Adapter in Optiplex 740.

This shows 1000mbps.

I think that it is not a problem of the hub and the cable.

Thanks

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

3. Nov 9, 2009 9:20 AM in response to: yito
Click to view AndreTheGiant's profile Guru
AndreTheGiant
5,916 posts since
Aug 28, 2008
You can try to use esxcfg-nics command to force the speed.
But first you have to enable SSH or the hidden console.

Andre

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

4. Nov 9, 2009 11:08 AM in response to: yito
Click to view mcowger's profile Virtuoso
mcowger
2,060 posts since
Aug 22, 2007
Highly recommend replacing the cable. Many people come and ask this question and are sure their cable and switch port are good, and after days of troubleshooting they replace the cable/port and lo-and-behold, its fixed....






--Matt
VCP, vExpert, Unix Geek

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

5. Nov 9, 2009 5:22 PM in response to: mcowger
Click to view yito's profile Novice
yito
5 posts since
Apr 8, 2008
Hi,mcowger

I change cable and Hub,and I check link speed.
I report the result.

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

6. Nov 10, 2009 4:46 AM in response to: yito
Click to view yito's profile Novice
yito
5 posts since
Apr 8, 2008
Hi,mcowger

When cables were exchanged, Link Speed became 1gbps.

OOPS :_|

It is uneven though it is same CAT5.

Thanks for reply.

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

7. Nov 10, 2009 11:53 PM in response to: yito
Click to view jintoa's profile Enthusiast
jintoa
36 posts since
Jan 16, 2009
If your question is answered can you please mark is as "Answered"? Thanks!

Signature: If you found this information useful, please consider awarding points for "Correct" or "Helpful". Thanx!

Re: Link speed of the Broadcom BCM5754 Gigabit Ethernet becomes only 100Mbps.

8. Nov 11, 2009 12:31 AM in response to: jintoa
Click to view yito's profile Novice
yito
5 posts since
Apr 8, 2008
I was able to solve this question.

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