Network configuration
zh-CN:Network Configuration Template:Article summary start Template:Article summary text Template:Article summary heading Template:Article summary text Template:Article summary heading Template:Article summary wiki Template:Article summary wiki Template:Article summary wiki Template:Article summary end
This page explains how to set up a wired connection to a network. If you need to set up wireless networking see the Wireless Setup page.
Contents
- 1 Check the connection
- 2 Set the hostname
- 3 Device Driver
- 4 Network Interfaces
- 5 Configure the IP address
- 6 Load configuration
- 7 Additional settings
- 8 Troubleshooting
- 8.1 Swapping computers on the cable modem
- 8.2 The TCP window scaling problem
- 8.3 Realtek no link / WOL problem
- 8.4 DLink G604T/DLink G502T DNS problem
- 8.5 Check DHCP problem by releasing IP first
- 8.6 No eth0 with Atheros AR8161
- 8.7 No eth0 with Atheros AR9485
- 8.8 No carrier / no connection after suspend
- 8.9 PC Pingable by IP but not by hostname?
- 8.10 Broadcom BCM57780
Check the connection
ping: icmp open socket: Operation not permitted
when executing ping, try to re-install the iputils
package.Many times, the basic installation procedure has created a working network configuration. To check if this is so, use the following command:
-c 3
option calls it three times. See man ping
for more information.$ ping -c 3 www.google.com
PING www.l.google.com (74.125.224.146) 56(84) bytes of data. 64 bytes from 74.125.224.146: icmp_req=1 ttl=50 time=437 ms 64 bytes from 74.125.224.146: icmp_req=2 ttl=50 time=385 ms 64 bytes from 74.125.224.146: icmp_req=3 ttl=50 time=298 ms --- www.l.google.com ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1999ms rtt min/avg/max/mdev = 298.107/373.642/437.202/57.415 ms
If it works, then you may only wish to personalize your settings from the options below.
If the previous command complains about unknown hosts, it means that your machine was unable to resolve this domain name. It might be related to your service provider or your router/gateway. You can try pinging a static IP address to prove that your machine has access to the Internet.
$ ping -c 3 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_req=1 ttl=53 time=52.9 ms 64 bytes from 8.8.8.8: icmp_req=2 ttl=53 time=72.5 ms 64 bytes from 8.8.8.8: icmp_req=3 ttl=53 time=70.6 ms --- 8.8.8.8 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 52.975/65.375/72.543/8.803 ms
8.8.8.8
is a static address that is easy to remember. It is the address of Google's primary DNS server, therefore it can be considered reliable, and is generally not blocked by content filtering systems and proxies.If you are able to ping this address, you may try adding this nameserver to your /etc/resolv.conf
file.
Set the hostname
A hostname is a unique name created to identify a machine on a network: it is configured in /etc/hostname
. The file can contain the system's domain name, if any. To set the hostname, do:
# hostnamectl set-hostname myhostname
This will put myhostname in /etc/hostname
.
See man 5 hostname
and man 1 hostnamectl
for details.
-
hostnamectl
supports FQDNs - You no longer need to edit
/etc/hosts
, systemd will provide host name resolution, and is installed on all systems by default.
To set the hostname temporarily (until a reboot), use the hostname
command from inetutils:
# hostname myhostname
Device Driver
Check the driver status
udev should detect your network interface card (NIC) and automatically load the necessary module at start up. Check the "Ethernet controller" entry (or similar) from the lspci -v
output. It should tell you which kernel module contains the driver for your network device. For example:
$ lspci -v
02:00.0 Ethernet controller: Attansic Technology Corp. L1 Gigabit Ethernet Adapter (rev b0) ... Kernel driver in use: atl1 Kernel modules: atl1
Next, check that the driver was loaded via dmesg | grep module_name
. For example:
$ dmesg | grep atl1 ... atl1 0000:02:00.0: eth0 link is up 100 Mbps full duplex
Skip the next section if the driver was loaded successfully. Otherwise, you will need to know which module is needed for your particular model.
Load the device module
Google for the right module/driver for the chipset. Some common modules are 8139too
for cards with a Realtek chipset, or sis900
for cards with a SiS chipset. Once you know which module to use, try to load it manually. If you get an error saying that the module was not found, it's possible that the driver is not included in Arch kernel. You may search the AUR for the module name.
If udev is not detecting and loading the proper module automatically during bootup, see Kernel modules#Loading.
Network Interfaces
Device names
For motherboards that have integrated NICs, it is important to have fixed device name. Many configuration problems are caused by interface name changing.
Udev is responsible for which device gets which name. Systemd v197 introduced Predictable Network Interface Names, which automatically assigns static names to network devices. Interfaces are now prefixed with en (ethernet), wl (WLAN), or ww (WWAN) followed by an automatically generated identifier, creating an entry such as enp0s25
.
This behavior may be disabled by adding a symlink:
# ln -s /dev/null /etc/udev/rules.d/80-net-name-slot.rules
Users upgrading from an earlier systemd version will have a blank rules file created automatically. So if you want to use persistent device names, just delete the file.
ip link
or ls /sys/class/net
to list all available interfaces.netctl reenable profile
to update the generated service file.Change device name
You can change the device name by defining the name manually with an udev-rule. For example:
/etc/udev/rules.d/10-network.rules
SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="aa:bb:cc:dd:ee:ff", NAME="net1" SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="ff:ee:dd:cc:bb:aa", NAME="net0"
A couple things to note:
- To get the MAC address of each card, use this command:
cat /sys/class/net/device-name/address
- Make sure to use the lower-case hex values in your udev rules. It doesn't like upper-case.
net0
, net1
, wifi0
, wifi1
. For further details please see the systemd documentation.Set device MTU and queue Length
You can change the device MTU and queue length by defining manually with an udev-rule. For example:
/etc/udev/rules.d/10-network.rules
ACTION=="add", SUBSYSTEM=="net", KERNEL=="wl*", ATTR{mtu}="1480", ATTR{tx_queue_len}="2000"
Get current device names
Current NIC names can be found via sysfs
$ ls /sys/class/net
lo eth0 eth1 firewire0
Enabling and disabling network interfaces
You can activate or deactivate network interfaces using:
# ip link set eth0 up # ip link set eth0 down
To check the result:
$ ip link show dev eth0
2: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP mode DEFAULT qlen 1000 ...
Configure the IP address
You have two options: a dynamically assigned address using DHCP, or an unchanging "static" address.
Dynamic IP address
Manually run DHCP Client Daemon
Please note that dhcpcd
is not dhcpd
.
# dhcpcd eth0
dhcpcd: version 5.1.1 starting dhcpcd: eth0: broadcasting for a lease ... dhcpcd: eth0: leased 192.168.1.70 for 86400 seconds
And now, ip addr show dev eth0
should show your inet address.
For some people, dhclient
(from the dhclient package) works where dhcpcd
fails.
Run DHCP at boot
If you simply want to use DHCP for your Ethernet connection, you can use dhcpcd@.service
(provided by the dhcpcd package).
To start DHCP for eth0
, simply use:
# systemctl start dhcpcd@eth0
You can enable the service to automatically start at boot with:
# systemctl enable dhcpcd@eth0
If the dhcpd service starts before your network card module (FS#30235), manually add your network card to /etc/modules-load.d/*.conf
. For example, if your Realtek card needs r8169
to be loaded, create:
/etc/modules-load.d/realtek.conf
r8169
lspci -k
.If you use DHCP and you do not want your DNS servers automatically assigned every time you start your network, be sure to add the following to the last section of dhcpcd.conf
:
/etc/dhcpcd.conf
nohook resolv.conf
To prevent dhcpcd
from adding domain name servers to /etc/resolv.conf
, use the nooption
option:
/etc/dhcpcd.conf
nooption domain_name_servers
Then add your own DNS name server to /etc/resolv.conf
.
You may use the openresolv package if several different processes want to control /etc/resolv.conf
(e.g. dhcpcd and a VPN client). No additional configuration for dhcpcd is needed to use openresolv.
Static IP address
There are various reasons why you may wish to assign static IP addresses on your network. For instance, one may gain a certain degree of predictability with unchanging addresses, or you may not have a DHCP server available.
You need:
- Static IP address
- Subnet mask
- Broadcast address
- Gateway's IP address
If you are running a private network, it is safe to use IP addresses in 192.168.*.* for your IP addresses, with a subnet mask of 255.255.255.0 and a broadcast address of 192.168.*.255. The gateway is usually 192.168.*.1 or 192.168.*.254.
Manual assignment
You can assign a static IP address in the console:
# ip addr add <IP address>/<subnet mask> dev <interface>
For example:
# ip addr add 192.168.1.2/24 dev eth0
For more options, see man ip
.
Add your gateway like so:
# ip route add default via <default gateway IP address>
For example:
# ip route add default via 192.168.1.1
If you the get the error "No such process", it means you have to run ip link set dev eth0 up
as root.
Manual connection at boot using systemd
First create configuration file for the systemd service, replace <interface>
with proper interface name:
/etc/conf.d/network@<interface>
address=192.168.0.15 netmask=24 broadcast=192.168.0.255 gateway=192.168.0.1
Create a systemd unit file:
/etc/systemd/system/network@.service
[Unit] Description=Network connectivity (%i) Wants=network.target Before=network.target BindsTo=sys-subsystem-net-devices-%i.device After=sys-subsystem-net-devices-%i.device [Service] Type=oneshot RemainAfterExit=yes EnvironmentFile=/etc/conf.d/network@%i ExecStart=/usr/bin/ip link set dev %i up ExecStart=/usr/bin/ip addr add ${address}/${netmask} broadcast ${broadcast} dev %i ExecStart=/usr/bin/ip route add default via ${gateway} ExecStop=/usr/bin/ip addr flush dev %i ExecStop=/usr/bin/ip link set dev %i down [Install] WantedBy=multi-user.target
Enable the unit and start it, passing the name of the interface:
# systemctl enable network@eth0.service # systemctl start network@eth0.service
Calculating addresses
You can use ipcalc
provided by the ipcalc package to calculate IP broadcast, network, netmask, and host ranges for more advanced configurations. For example, I use ethernet over firewire to connect a windows machine to arch. For security and network organization, I placed them on their own network and configured the netmask and broadcast so that they are the only 2 machines on it. To figure out the netmask and broadcast addresses for this, I used ipcalc, providing it with the IP of the arch firewire nic 10.66.66.1, and specifying ipcalc should create a network of only 2 hosts.
$ ipcalc -nb 10.66.66.1 -s 1
Address: 10.66.66.1 Netmask: 255.255.255.252 = 30 Network: 10.66.66.0/30 HostMin: 10.66.66.1 HostMax: 10.66.66.2 Broadcast: 10.66.66.3 Hosts/Net: 2 Class A, Private Internet
Load configuration
To test your settings either reboot the computer or reload the relevant systemd services:
# systemctl restart dhcpcd@eth0
Try pinging your gateway, DNS server, ISP provider and other Internet sites, in that order, to detect any connection problems along the way, as in this example:
$ ping -c 3 www.google.com
Additional settings
ifplugd for laptops
ifplugd in Official Repositories is a daemon which will automatically configure your Ethernet device when a cable is plugged in and automatically unconfigure it if the cable is pulled. This is useful on laptops with onboard network adapters, since it will only configure the interface when a cable is really connected. Another use is when you just need to restart the network but do not want to restart the computer or do it from the shell.
By default it is configured to work for the eth0
device. This and other settings like delays can be configured in /etc/ifplugd/ifplugd.conf
.
netctl-ifplugd@.service
, otherwise you can use ifplugd@.service
from ifplugd package. Use for example systemctl enable ifplugd@eth0.service
.Bonding or LAG
See netctl#Bonding.
IP address aliasing
IP aliasing is the process of adding more than one IP address to a network interface. With this, one node on a network can have multiple connections to a network, each serving a different purpose. Typical uses are virtual hosting of Web and FTP servers, or reorganizing servers without having to update any other machines (this is especially useful for nameservers).
Example
You will need netctl from the Official Repositories.
Prepare the configuration:
/etc/netctl/mynetwork
Connection='ethernet' Description='Five different addresses on the same NIC.' Interface='eth0' IP='static' Address=('192.168.1.10' '192.168.178.11' '192.168.1.12' '192.168.1.13' '192.168.1.14' '192.168.1.15') Gateway='192.168.1.1' DNS=('192.168.1.1')
Then simply execute:
$ netctl start mynetwork
Change MAC/hardware address
See MAC Address Spoofing.
See Internet Share.
Router Configuration
See Router.
Troubleshooting
Swapping computers on the cable modem
Most domestic cable ISPs (videotron for example) have the cable modem configured to recognize only one client PC, by the MAC address of its network interface. Once the cable modem has learned the MAC address of the first PC or equipment that talks to it, it will not respond to another MAC address in any way. Thus if you swap one PC for another (or for a router), the new PC (or router) will not work with the cable modem, because the new PC (or router) has a MAC address different from the old one. To reset the cable modem so that it will recognise the new PC, you must power the cable modem off and on again. Once the cable modem has rebooted and gone fully online again (indicator lights settled down), reboot the newly connected PC so that it makes a DHCP request, or manually make it request a new DHCP lease.
If this method does not work, you will need to clone the MAC address of the original machine. See also Change MAC/hardware address.
The TCP window scaling problem
TCP packets contain a "window" value in their headers indicating how much data the other host may send in return. This value is represented with only 16 bits, hence the window size is at most 64Kb. TCP packets are cached for a while (they have to be reordered), and as memory is (or used to be) limited, one host could easily run out of it.
Back in 1992, as more and more memory became available, RFC 1323 was written to improve the situation: Window Scaling. The "window" value, provided in all packets, will be modified by a Scale Factor defined once, at the very beginning of the connection.
That 8-bit Scale Factor allows the Window to be up to 32 times higher than the initial 64Kb.
It appears that some broken routers and firewalls on the Internet are rewriting the Scale Factor to 0 which causes misunderstandings between hosts.
The Linux kernel 2.6.17 introduced a new calculation scheme generating higher Scale Factors, virtually making the aftermaths of the broken routers and firewalls more visible.
The resulting connection is at best very slow or broken.
How to diagnose the problem
First of all, let's make it clear: this problem is odd. In some cases, you will not be able to use TCP connections (HTTP, FTP, ...) at all and in others, you will be able to communicate with some hosts (very few).
When you have this problem, the dmesg
's output is OK, logs are clean and ip addr
will report normal status... and actually everything appears normal.
If you cannot browse any website, but you can ping some random hosts, chances are great that you're experiencing this problem: ping uses ICMP and is not affected by TCP problems.
You can try to use Wireshark. You might see successful UDP and ICMP communications but unsuccessful TCP communications (only to foreign hosts).
How to fix it (The bad way)
To fix it the bad way, you can change the tcp_rmem value, on which Scale Factor calculation is based. Although it should work for most hosts, it is not guaranteed, especially for very distant ones.
# echo "4096 87380 174760" > /proc/sys/net/ipv4/tcp_rmem
How to fix it (The good way)
Simply disable Window Scaling. Since Window Scaling is a nice TCP feature, it may be uncomfortable to disable it, especially if you cannot fix the broken router. There are several ways to disable Window Scaling, and it seems that the most bulletproof way (which will work with most kernels) is to add the following line to /etc/sysctl.d/99-sysctl.conf
(see also sysctl)
net.ipv4.tcp_window_scaling = 0
How to fix it (The best way)
This problem is caused by broken routers/firewalls, so let's change them. Some users have reported that the broken router was their very own DSL router.
More about it
This section is based on the LWN article TCP window scaling and broken routers and a Kernel Trap article: Window Scaling on the Internet.
There are also several relevant threads on the LKML.
Realtek no link / WOL problem
Users with Realtek 8168 8169 8101 8111(C) based NICs (cards / and on-board) may notice a problem where the NIC seems to be disabled on boot and has no Link light. This can usually be found on a dual boot system where Windows is also installed. It seems that using the offical Realtek drivers (dated anything after May 2007) under Windows is the cause. These newer drivers disable the Wake-On-LAN feature by disabling the NIC at Windows shutdown time, where it will remain disabled until the next time Windows boots. You will be able to notice if this problem is affecting you if the Link light remains off until Windows boots up; during Windows shutdown the Link light will switch off. Normal operation should be that the link light is always on as long as the system is on, even during POST. This problem will also affect other operative systems without newer drivers (eg. Live CDs). Here are a few fixes for this problem:
Method 1 - Rollback/change Windows driver
You can roll back your Windows NIC driver to the Microsoft provided one (if available), or roll back/install an official Realtek driver pre-dating May 2007 (may be on the CD that came with your hardware).
Method 2 - Enable WOL in Windows driver
Probably the best and the fastest fix is to change this setting in the Windows driver. This way it should be fixed system-wide and not only under Arch (eg. live CDs, other operative systems). In Windows, under Device Manager, find your Realtek network adapter and double-click it. Under the Advanced tab, change "Wake-on-LAN after shutdown" to Enable.
In Windows XP (example) Right click my computer --> Hardware tab --> Device Manager --> Network Adapters --> "double click" Realtek ... --> Advanced tab --> Wake-On-Lan After Shutdown --> Enable
Disable
has no effect (you will notice the Link light still turns off upon Windows shutdown). One rather dirty workaround is to boot to Windows and just reset the system (perform an ungraceful restart/shutdown) thus not giving the Windows driver a chance to disable LAN. The Link light will remain on and the LAN adapter will remain accessible after POST - that is until you boot back to Windows and shut it down properly again.Method 3 - Newer Realtek Linux driver
Any newer driver for these Realtek cards can be found for Linux on the realtek site. (untested but believed to also solve the problem).
Method 4 - Enable LAN Boot ROM in BIOS/CMOS
It appears that setting Integrated Peripherals --> Onboard LAN Boot ROM --> Enabled in BIOS/CMOS reactivates the Realtek LAN chip on system boot-up, despite the Windows driver disabling it on OS shutdown.
DLink G604T/DLink G502T DNS problem
Users with a DLink G604T/DLink G502T router, using DHCP and have firmware v2.00+ (typically users with AUS firmware) may have problems with certain programs not resolving the DNS. One of these programs are unfortunatley pacman. The problem is basically the router in certain situations is not sending the DNS properly to DHCP, which causes programs to try and connect to servers with an IP address of 1.0.0.0 and fail with a connection timed out error
How to diagnose the problem
The best way to diagnose the problem is to use Firefox/Konqueror/links/seamonkey and to enable wget for pacman. If this is a fresh install of Arch Linux, then you may want to consider installing links
through the live CD.
Firstly, enable wget for pacman (since it gives us info about pacman when it is downloading packages)
Open /etc/pacman.conf
with your favourite editor and uncomment the following line (remove the # if it is there)
XferCommand=/usr/bin/wget --passive-ftp -c -O %o %u
While you are editing /etc/pacman.conf
, check the default mirror that pacman uses to download packages.
Now open up the default mirror in an Internet browser to see if the mirror actually works. If it does work, then do pacman -Syy
(otherwise pick another working mirror and set it to the pacman default). If you get something similar to the following (notice the 1.0.0.0),
ftp://mirror.pacific.net.au/linux/archlinux/extra/os/i686/extra.db.tar.gz => '/var/lib/pacman/community.db.tar.gz.part' Resolving mirror.pacific.net.au... 1.0.0.0
then you most likely have this problem. The 1.0.0.0 means it is unable to resolve DNS, so we must add it to /etc/resolv.conf
.
How to fix it
Basically what we need to do is to manually add the DNS servers to our /etc/resolv.conf
file. The problem is that DHCP automatically deletes and replaces this file on boot, so we need to edit /etc/conf.d/dhcpcd
and change the flags to stop DHCP from doing this.
When you open /etc/conf.d/dhcpcd
, you should see something close to the following:
DHCPCD_ARGS="-t 30 -h $HOSTNAME"
Add the -R
flag to the arguments, e.g.,
DHCPCD_ARGS="-R -t 30 -h $HOSTNAME"
-R
flag has been deprecated. Please see the #For DHCP assigned IP address section for information on how to use a custom /etc/resolv.conf
file.Save and close the file; now open /etc/resolv.conf
. You should see a single nameserver (most likely 10.1.1.1). This is the gateway to your router, which we need to connect to in order to get the DNS servers of your ISP. Paste the IP address into your browser and log in to your router. Go to the DNS section, and you should see an IP address in the Primary DNS Server field; copy it and paste it as a nameserver ABOVE the current gateway one.
For example, /etc/resolv.conf
should look something along the lines of:
nameserver 10.1.1.1
If my primary DNS server is 211.29.132.12, then change /etc/resolv.conf
to:
nameserver 211.29.132.12 nameserver 10.1.1.1
Now restart the network daemon by running systemctl restart dhcpcd@<interface>
and do pacman -Syy
. If it syncs correctly with the server, then the problem is solved.
More about it
This is the whirlpool forum (Australian ISP community) which talks about and gives the same solution to the problem:
http://forums.whirlpool.net.au/forum-replies-archive.cfm/461625.html
Check DHCP problem by releasing IP first
Problem may occur when DHCP get wrong IP assignment. For example when two routers are tied together through VPN. The router that is connected to me by VPN may assigning IP address. To fix it. On a console, as root, release IP address:
# dhcpcd -k
Then request a new one:
# dhcpcd
Maybe you had to run those two commands many times.
No eth0 with Atheros AR8161
With the Atheros AR8161 Gigabit Ethernet card, the ethernet connection is not working out-of-the-box (with the installation media of March 2013). The module "alx" needs to be loaded but is not present.
The driver from compat-wireless (that has become compat-drives since linux 3.7) need to be installed. The "-u" postfix annotates that Qualcomm have applied a driver under a unified driver.
$ wget https://www.kernel.org/pub/linux/kernel/projects/backports/2013/03/28/compat-drivers-2013-03-28-5-u.tar.bz2 $ tar xjf compat* $ cd compat* $ ./scripts/driver-select alx $ make $ sudo make install $ sudo modprobe alx
The alx driver has not been added to Linux kernel due to various problems. Compatibility between the different kernel versions has been spotty. For better support follow the mailing listand alx pagefor latest working solution for alx.
The driver must be built and installed after every kernel change.
Alternatively you can use the AUR package for compat drivers, which installs many other drivers.
No eth0 with Atheros AR9485
The ethernet (eth0) for Atheros AR9485 are not working out-of-the-box (with installation media of March 2013). The working solution for this is to install the package compat-drivers-patched from AUR.
No carrier / no connection after suspend
After suspend to RAM no connection is found although the network cable is plugged in. This may be caused by PCI power management. What is the output of
# ip link show eth0
If the line contains "NO-CARRIER" even though there's a cable connected to your eth0 port, it is possible that the device was auto-suspended and the media sense feature doesn't work. To solve this, first you need to find your ethernet controllers PCI address by
# lspci
This should look similar to this:
... 00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 06) ...
So the address is 00:19.0. Now check the PM status of the device by issuing
# cat "/sys/bus/pci/devices/0000:00:19.0/power/control"
substituting 00:19.0 with the address obtained from lspci. If the output reads "auto", you can try to bring the device out of suspend by
# echo on > "/sys/bus/pci/devices/0000:00:19.0/power/control"
Don't forget to substitute the address again.
PC Pingable by IP but not by hostname?
This issue hunted me for months! Turns out to be a very simple fix IF you are using samba as well. Usually people only start smbd which is enough for network access to work, but does not advocate the pc's name to the router. nmbd is doing that so you should always have:
# systemctl enable smbd.service # systemctl enable nmbd.service
Which makes them run at startup. If you don't want to restart then you can start then right away with:
# systemctl start smbd.service # systemctl start nmbd.service
And that makes the computer available by name on the network.
Broadcom BCM57780
This Broadcom chipset sometimes does not behave well unless you specify the order of the modules to be loaded. The modules are broadcom
and tg3
, the former needing to be loaded first.
These steps should help if your computer has this chipset:
$ lspci | grep Ethernet 02:00.0 Ethernet controller: Broadcom Corporation NetLink BCM57780 Gigabit Ethernet PCIe (rev 01)
If your wired networking is not functioning in some way or another, try unplugging your cable then doing the following (as root):
# modprobe -r tg3 # modprobe broadcom # modprobe tg3
Now plug you network cable in. If this solves your problems you can make this permanent by adding broadcom
and tg3
(in this order) to the MODULES
array in /etc/mkinitcpio.conf
:
MODULES=".. broadcom tg3 .."
Then rebuild the initramfs:
# mkinitcpio -p linux