For a Netra X1 or V100 edit the file:

    /platform/SUNW,UltraAX-i2/kernel/drv/dmfe.conf

change the following variables from whatever they are to:

speed=100;
full-duplex=1;


For QFE cards add the following to the end of the /etc/system file:


set qfe:qfe_adv_autoneg_cap=0
set qfe:qfe_adv_100T4_cap=0
set qfe:qfe_adv_100fdx_cap=1
set qfe:qfe_adv_100hdx_cap=0
set qfe:qfe_adv_10fdx_cap=0
set qfe:qfe_adv_10hdx_cap=0


For HME cards ass the following to the end of the /etc/system file:

set hme:hme_adv_autoneg_cap=0
set hme:hme_adv_100T4_cap=0
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

For eri cards add the following to the end of the /etc/system file:

set eri:adv_autoneg_cap=0
set eri:adv_100T4_cap=0
set eri:adv_100fdx_cap=1
set eri:adv_100hdx_cap=0
set eri:adv_10fdx_cap=0
set eri:adv_10hdx_cap=0

BGE.CONF
To force bge interface to 100mbps full duplex, put the following entries
in
/platform/sun4u/kernel/drv/bge.conf
A reboot is required for this method.

adv_1000fdx_cap=0;
adv_1000hdx_cap=0;
adv_100fdx_cap=1;
adv_100hdx_cap=0;
adv_10fdx_cap=0;
adv_10hdx_cap=0;
adv_autoneg_cap=0;



All of these settings require a reboot.