take a look at docs.sun.com and search about hme.conf or qfe.conf with parameters for each instance !
It's possible to write on /kernel/drv/qfe.conf
like :
name="SUNW,qfe" parent="/pci@1f,2000/pci@1" unit-address="0,1" adv_100T4_cap=0 adv_100fdx_cap=0 adv_100hdx_cap=0 adv_10fdx_cap=1 adv_10hdx_cap=0 adv_autoneg_cap=0;
name="SUNW,qfe" parent="/pci@1f,2000/pci@1" unit-address="1,1" adv_100T4_cap=0 adv_100fdx_cap=0 adv_100hdx_cap=0 adv_10fdx_cap=1 adv_10hdx_cap=0 adv_autoneg_cap=0;
informations come from "grep qfe /etc/path_to_inst
regards
Andy