Add new ethernet in linux

1. check whether it already detect in kernel or not using dmesg

#dmesg | grep net
audit: initializing netlink socket (disabled)
SELinux: Registering netfilter hooks
Initializing IPsec netlink socket
VMware vmxnet virtual NIC driver
Found vmxnet/PCI at 0x2024, irq 59.
SELinux: Unregistering netfilter hooks
pcnet32.c:v1.32 18.Mar.2006 tsbogend@alpha.franken.de
process `sysctl' is using deprecated sysctl (syscall) net.ipv6.neigh.lo.base_reachable_time; Use net.ipv6.neigh.lo.base_reachable_time_ms instead.
Found vmxnet/PCI at 0x20a4, irq 75.

as we can see, we find ethernet call vmcnet/pci

2. give alias in /etc/modprobe.conf

#vi /etc/modprobe.conf
alias eth0 vmnics
alias eth1 vmnics

as i have already new ethernet before. so i just add new one below the previous one. since newer ethenet is same with before, so the driver possibly same too

3. next step is probe the driver

# modprobe eth1

if something goes well there will no error message

4. after that, try check using ifconfig

# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:50:56:97:5A:3F
inet6 addr: 2001:e00:e:27:250:56ff:fe97:5a3f/64 Scope:Global
inet6 addr: fe80::250:56ff:fe97:5a3f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:383 errors:0 dropped:0 overruns:0 frame:0
TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:25774 (25.1 KiB) TX bytes:6249 (6.1 KiB)
Interrupt:67 Base address:0x20a4

perfect, eth1 is installed in my linux box :-)

5. now, i'd like to give it ip. to make permanently, i will create new file in /etc/sysconfig/network-scripts/ifcfg-eth1
or, if you got little busy, you can use setup menu
# setup
on setup menu, choose network configuration


after that, choose eth1


6. after finish setup, restart your network
/etc/init.d/network restart
Shutting down interface eth0: [ OK ]
Shutting down interface eth1: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: [ OK ]
Bringing up interface eth1: [ OK ]

finish