you can with ethtool:
ethtool -s ethX autoneg off speed 10 duplex full
ethX is your red NIC
This property works until next reboot or network istant. If it works you have to insert the line into startscript.
Switched to Realtek Gigabit NIC (r8169) for better (?) performance. Red interface is eth1:
# ethtool -s eth1 autoneg off speed 10 duplex full
# ethtool eth1
Settings for eth1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Full
Advertised auto-negotiation: Yes
Speed: 10Mb/s
Duplex:
Half Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
Link detected: yes
Why does my red NIC operate in half duplex mode???