SUMMARY : E3000 Default NIC or Quad?

From: Stephen Johnston (
Date: Mon Mar 29 1999 - 01:30:50 CST

Hi All

Thx for the many replies;

Orginal Question;

> We have an E3000, firstly does this have a full duplex 100Mb card in it
> or is it half-duplex, I think it's half but am getting an argument about
> this?
> We need more bandwidth, I think we should put a Quad Ethernet card in it
> for up to 400Mbs, is this a normal thing to do?


The E3000 does have full duplex 100Mb/s, it isn't enabled by default.

(FAQ)", "Subject: 12.3)". To find out...

Do a:

    # ndd /dev/hme \?

as a reminder, then:

    # ndd /dev/hme link_speed link_mode

link_speed: 0=10mbps, 1=100mbps
link_mode: 0=half-duplex, 1=full-duplex

There are several ways of changing the default settings and force
full-duplex mode; you may need to alter your
switch settings as well.

Setting through /etc/system

                set hme:hme_adv_autoneg_cap=0
                set hme:hme_adv_100hdx_cap=0
                set hme:hme_adv_100fdx_cap=1

Setting with ndd

                ndd -set /dev/hme adv_autoneg_cap 0
                ndd -set /dev/hme adv_100hdx_cap 0
                ndd -set /dev/hme adv_100fdx_cap 1

In case you have multiple instances (e.g. Quad), you need to select the
specific hme
instance first, e.g., use the following to
select hme1:

                ndd -set /dev/hme instance 1

If you need to query the device, you can interrogate various variables
such as ``link_status'', ``link_speed'', etc.

Some patches may be required
  102979 for 2.5
  104212 for 2.5.1

Sun trunking s/w is needed to make the Quad Card run as 4 combined
channels, but is a normal thing to do.

Thanks again to all those who answered, too numerous to mention - you
know who you are :)



Stephen Johnston                                 Phone: +49 89 32006443
UNIX Sysadmin                                    Fax  : +49 89 32006380
European Southern Observatory
Karl-Schwarzschild-Strasse 2
D-85748 Garching bei Muenchen

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