freebsd stable - Jan 2004 - /kernel: em0: Link is Down

Hi

I'm seeing a lot of the error messages below on a dual Xeon 2.5 Ghz running
4.9-STABLE
built on Wed Nov 26 2003.  The errors started when I moved a fairly busy
database to this
server.

Jan  4 17:56:50 king7 /kernel: em0: Link is up 100 Mbps Full Duplex
Jan  4 19:04:18 king7 /kernel: em0: Link is Down
Jan  4 19:04:20 king7 /kernel: em0: Link is up 100 Mbps Full Duplex
Jan  4 23:59:06 king7 /kernel: em0: Link is Down
Jan  4 23:59:08 king7 /kernel: em0: Link is up 100 Mbps Full Duplex
Jan  5 01:04:48 king7 /kernel: em0: Link is Down
Jan  5 01:04:50 king7 /kernel: em0: Link is up 100 Mbps Full Duplex

I found menton of changing  '#define EM_REPORT_TX_EARLY 0' to
'#define EM_REPORT_TX_EARLY
1' in /usr/src/sys/dev/em/if_em.h but my if_em.h doesn't have this line

Anyone have any suggestions on how to remedy this?   Is this a known problem
that would
have been fixed since my system was compiled in November?

Thanks
-- 
Clint Gilders <techservices@onlinehobbyist.com>
Director of Technology Services
OnlineHobbyist.com, Inc.

Just to verify, I would assume you've checked the following?:

	- Bad Cable - May not have appeared until it got loaded
	- Auto Negotiate Issues (check duplex) - Very common
	- Force to 10mbps to see if it still happens
	- For to half duplex in both 10 & 100 mbps
	- Different physical port on the switch

I haven't seen any issues on this list with the em driver, but I may be
wrong. I don't have em cards, so other than the above, I can't offer
much.

-Steve

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On Mon, 5 Jan 2004, Clint Gilders wrote:
> Hi
>
> I'm seeing a lot of the error messages below on a dual Xeon 2.5 Ghz
running 4.9-STABLE
> built on Wed Nov 26 2003.  The errors started when I moved a fairly busy
database to this
> server.
>
> Jan  4 17:56:50 king7 /kernel: em0: Link is up 100 Mbps Full Duplex
> Jan  4 19:04:18 king7 /kernel: em0: Link is Down
> Jan  4 19:04:20 king7 /kernel: em0: Link is up 100 Mbps Full Duplex
> Jan  4 23:59:06 king7 /kernel: em0: Link is Down
> Jan  4 23:59:08 king7 /kernel: em0: Link is up 100 Mbps Full Duplex
> Jan  5 01:04:48 king7 /kernel: em0: Link is Down
> Jan  5 01:04:50 king7 /kernel: em0: Link is up 100 Mbps Full Duplex
>
> I found menton of changing  '#define EM_REPORT_TX_EARLY 0' to
'#define EM_REPORT_TX_EARLY
> 1' in /usr/src/sys/dev/em/if_em.h but my if_em.h doesn't have this
line
>
> Anyone have any suggestions on how to remedy this?   Is this a known
problem that would
> have been fixed since my system was compiled in November?
>
> Thanks
> --
> Clint Gilders <techservices@onlinehobbyist.com>
> Director of Technology Services
> OnlineHobbyist.com, Inc.
>
> _______________________________________________
> freebsd-stable@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to
"freebsd-stable-unsubscribe@freebsd.org"
>

> I'm seeing a lot of the error messages below on a
> dual Xeon 2.5 Ghz running 4.9-STABLE 
> built on Wed Nov 26 2003.  The errors started when I
> moved a fairly busy database to this 
> server.
> 
> Jan  4 17:56:50 king7 /kernel: em0: Link is up 100
> Mbps Full Duplex
> Jan  4 19:04:18 king7 /kernel: em0: Link is Down
Are you using ACPI? I had a similar issue running the
5.1 branch two months ago. Disabling ACPI cured my
problem on an ASUS motherboard.

regards
Claus


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