hme0 down - cable tests fine 10BaseT Half duplex

2007-12-25 10:43:00

Sorry about the increadibly late summary. Life exploded shortly after i

fixed my problem...

Anyway here it is:

Original query:

hme0 down - cable tests fine 10BaseT Half duplex

Sun Ultra 10, Solaris 2.6.

Worked fine at my desk, moved it to another position, port was 100BaseT Full

duplex.

hme0 complained - link down - cable problem?

Had the port switched to 10BaseT half duplex to keep it simple (I've not

configured a NIC to stop auto negotiation before.) But it's still no good.

Any pointers :-/ ?

How do I set the NIC to stop it auto negotiating? What can I do to test the

NIC (prom tests? stuff at the OK> prompt?)

What fixed it:

Thanks to cmarble@orion.ac.hmc.edu (Chris Marble)

I used the ndd utility to check the settings of the hme interface.

The commands were:

ndd /dev/hme adv_100fdx_cap

ndd /dev/hme adv_100hdx_cap

ndd /dev/hme adv_10fdx_cap

ndd /dev/hme adv_10hdx_cap

ndd /dev/hme adv_autoneg_cap

I then forced the hme interface to run at 100Mb FDX using the following:

ndd -set /dev/hme adv_100fdx_cap 1

ndd -set /dev/hme adv_100hdx_cap 0

ndd -set /dev/hme adv_10fdx_cap 0

ndd -set /dev/hme adv_10hdx_cap 0

ndd -set /dev/hme adv_autoneg_cap 0

The parameters changed by ndd remain until the next system reboot.

To make them more permanent, I added the following to my /etc/system file

set hme:hme_adv_100fdx_cap = 1

set hme:hme_adv_100hdx_cap = 0

set hme:hme_adv_10fdx_cap = 0

set hme:hme_adv_10hdx_cap = 0

set hme:hme_adv_autoneg_cap = 0

In general the advice was;

Use /usr/sbin/ndd to examine your troublesome device(s). You can stick the

ndd cmds in an rc script or fiddle with /etc/system using 'set' (as in 'set

hme:hme_adv_autoneg_cap=0')

To find out what is configurable with ndd;

a206384@bogey.fmr.com (Karen Barrett)

Use # ndd /dev/hme \? to see what the valid parameter names are. Don't

forget that

if you are turning autonegotiate OFF, you must explicitly turn some mode ON

( sounds like you

probably want to turn on the 10hdx

Sorry again for the late summary. Cheers to all who helped;

Denise Naomi Ishikawa

Joe Thykattil

Andrew Evans

Daniel Luechtefeld ("Check the list archives - about two months ago I

summarized in detail the procedures provided to me for using ndd to disable

autonegotiation." ;-) Cheers Daniel

Tan Tshun Kiat

Vugt, Andres van (ICT) (HK)

Brian Scanlan

Kulp, Scott (Scott)** CTR **

Matthew Mauzy

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hme0 down - cable tests fine 10BaseT Half duplex

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