Using two nic and switching from one to another

[josip77]

Hi,
I have two nic installed in my laptop Acer Aspire 3630.
One is an Ethernet nic (eth0) and the other one is the wifi nic (eth1).
I have all drivers installed and working correctly.
I link my ethernet cable to the laptop, and the dhcpcd give me an ip address.
If I run firefox I am connected to internet.
Now, I unplug my ethernet cable and run KWifiManager (I use wpa_supplicant).
I'm able to see my wifi net and obtain an ip address.
But, if I run firefox, I receive a timed out error, because firefox try to connect by
the ethernet nic (eth0).
My question is: how can I switch the system to use the wifi nic (eth1), instead of eth0?
Sorry if my question is banal, but I'm new to the Linux world.
Thank you very much for your help.
Josip

[NeddySeagoon]

josip77,

Welcome to gentoo.

Your problem is caused because the wired interface is still up.
I think ifplugd does what you need, it takes the wired interface up and down depending on the connection state.

You can also set up your two interfaces as a bond. They operate as a single logical interface, with the same IP.
Then may be configured to operate in several modes.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[josip77]

hi,

i've installed ifenslave and i've activated the bounding with eth0 (wired) and eth1 (wifi).
With the ethernet cable linked i am on line.
If I unplug the cable and activate wifi, the slave interface come up, but don't become running.
I have disinstalled ifplugd, but no changes append.
Can you help me, please?
Thank you, Josip.


my /etc/conf.d/net is:
slaves_bond0="eth0 eth1"
config_bond0=("dhcp")
iwconfig_eth1="mode managed"
modules=( "wpa_supplicant" )
wpa_supplicant_eth1="-Dwext"

my /etc/modules.autoload.d/kernel-2.6 is:
bonding mode=1 miimon=100


boss ~ # cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.1.2 (January 20, 2007)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth1
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: up
Link Failure Count: 1
Permanent HW addr: 00:16:36:38:0a:96

Slave Interface: eth1
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:16:ce:42:80:95


(with the cable unplugged)
boss ~ # ifconfig
bond0 Link encap:Ethernet HWaddr 00:16:36:38:0A:96
inet addr:37.235.41.58 Bcast:37.235.47.255 Mask:255.255.248.0
inet6 addr: fe80::216:36ff:fe38:a96/64 Scope:Link
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:232 errors:0 dropped:62 overruns:0 frame:0
TX packets:3833 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:138678 (135.4 Kb) TX bytes:214588 (209.5 Kb)

eth0 Link encap:Ethernet HWaddr 00:16:36:38:0A:96
inet6 addr: fe80::216:36ff:fe38:a96/64 Scope:Link
UP BROADCAST SLAVE MULTICAST MTU:1500 Metric:1
RX packets:35 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:6601 (6.4 Kb) TX bytes:4304 (4.2 Kb)
Interrupt:16 Base address:0x2000

eth1 Link encap:Ethernet HWaddr 00:16:36:38:0A:96
inet6 addr: fe80::216:36ff:fe38:a96/64 Scope:Link
UP BROADCAST SLAVE MULTICAST MTU:1500 Metric:1
RX packets:197 errors:0 dropped:62 overruns:0 frame:0
TX packets:3803 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:132077 (128.9 Kb) TX bytes:210284 (205.3 Kb)
Interrupt:3 Base address:0xc000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)