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Linux device driver for Realtek Ethernet controllers (unofficial mirror) https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit-ethernet-pci-express-software
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<Linux device driver for Realtek Ethernet controllers> This is the Linux device driver released for RealTek RTL8125 2.5Gigabit Ethernet controllers with PCI-Express interface. <Requirements> - Kernel source tree (supported Linux kernel 2.6.x and 2.4.x) - For linux kernel 2.4.x, this driver supports 2.4.20 and latter. - Compiler/binutils for kernel compilation <Quick install with proper kernel settings> Unpack the tarball : # tar vjxf r8125-8.aaa.bb.tar.bz2 Change to the directory: # cd r8125-8.aaa.bb If you are running the target kernel, then you should be able to do : # ./autorun.sh (as root or with sudo) You can check whether the driver is loaded by using following commands. # lsmod | grep r8125 # ifconfig -a If there is a device name, ethX, shown on the monitor, the linux driver is loaded. Then, you can use the following command to activate the ethX. # ifconfig ethX up ,where X=0,1,2,... <Set the network related information> 1. Set manually a. Set the IP address of your machine. # ifconfig ethX "the IP address of your machine" b. Set the IP address of DNS. Insert the following configuration in /etc/resolv.conf. nameserver "the IP address of DNS" c. Set the IP address of gateway. # route add default gw "the IP address of gateway" 2. Set by doing configurations in /etc/sysconfig/network-scripts /ifcfg-ethX for Redhat and Fedora, or /etc/sysconfig/network /ifcfg-ethX for SuSE. There are two examples to set network configurations. a. Fixed IP address: DEVICE=eth0 BOOTPROTO=static ONBOOT=yes TYPE=ethernet NETMASK=255.255.255.0 IPADDR=192.168.1.1 GATEWAY=192.168.1.254 BROADCAST=192.168.1.255 b. DHCP: DEVICE=eth0 BOOTPROTO=dhcp ONBOOT=yes <Modify the MAC address> There are two ways to modify the MAC address of the NIC. 1. Use ifconfig: # ifconfig ethX hw ether YY:YY:YY:YY:YY:YY ,where X is the device number assigned by Linux kernel, and YY:YY:YY:YY:YY:YY is the MAC address assigned by the user. 2. Use ip: # ip link set ethX address YY:YY:YY:YY:YY:YY ,where X is the device number assigned by Linux kernel, and YY:YY:YY:YY:YY:YY is the MAC address assigned by the user. <Force Link Status> 1. Force the link status when insert the driver. If the user is in the path ~/r8125, the link status can be forced to one of the 5 modes as following command. # insmod ./src/r8125.ko speed=SPEED_MODE duplex=DUPLEX_MODE autoneg=NWAY_OPTION ,where SPEED_MODE = 1000 for 1000Mbps = 100 for 100Mbps = 10 for 10Mbps DUPLEX_MODE = 0 for half-duplex = 1 for full-duplex NWAY_OPTION = 0 for auto-negotiation off (true force) = 1 for auto-negotiation on (nway force) For example: # insmod ./src/r8125.ko speed=100 duplex=0 autoneg=1 will force PHY to operate in 100Mpbs Half-duplex(nway force). 2. Force the link status by using ethtool. a. Insert the driver first. b. Make sure that ethtool exists in /sbin. c. Force the link status as the following command. # ethtool -s ethX speed SPEED_MODE duplex DUPLEX_MODE autoneg NWAY_OPTION ,where SPEED_MODE = 1000 for 1000Mbps = 100 for 100Mbps = 10 for 10Mbps DUPLEX_MODE = half for half-duplex = full for full-duplex NWAY_OPTION = off for auto-negotiation off (true force) = on for auto-negotiation on (nway force) For example: # ethtool -s eth0 speed 100 duplex full autoneg on will force PHY to operate in 100Mpbs Full-duplex(nway force). <Jumbo Frame> Transmitting Jumbo Frames, whose packet size is bigger than 1500 bytes, please change mtu by the following command. # ifconfig ethX mtu MTU , where X=0,1,2,..., and MTU is configured by user. RTL8125 supports Jumbo Frame size up to 9 kBytes.