I have 2 ethernet cards (built into my motherboard) and 1 wireless card (assigned via dhcp as 192.168.1.67 by my ATT dsl modem/router) on my linux box. Wireless works fine. I tried using Network manager to configure eth1 but when I entered the desired IP address and Network Mask (255.255.255.0) then clicked save, the setting wouldn't take. If I immediately typed "ifconfig" I would get this:
eth0 Link encap:Ethernet HWaddr 00:04:4b:15:45:77
UP BROADCAST MULTICAST MTU:1500 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:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
eth1 Link encap:Ethernet HWaddr 00:04:4b:15:45:78
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:501 errors:341 dropped:18 overruns:340 frame:1
TX packets:457 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:57297 (57.2 KB) TX bytes:45203 (45.2 KB)
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:65536 Metric:1
RX packets:1119 errors:0 dropped:0 overruns:0 frame:0
TX packets:1119 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:105359 (105.3 KB) TX bytes:105359 (105.3 KB)
wlan0 Link encap:Ethernet HWaddr 00:c0:ca:36:46:12
inet addr:192.168.1.67 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2c0:caff:fe36:4612/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:14035 errors:0 dropped:0 overruns:0 frame:0
TX packets:8356 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:14142088 (14.1 MB) TX bytes:1208084 (1.2 MB)
It is obvious that eth1 was not configured even though I just configured it using the network manager tool. It's as if I didn't do anything. So I searched the web looking for something... something to enlighten me. I eventually found someone with a somewhat similar problem. So I started to follow what they did and here is some of what I did.
Dump of /etc/NetworkManager.conf
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
no-auto-default=00:04:4B:15:45:77,
[ifupdown]
managed=true
Notice the "managed = true." I changed that. It previously said, "managed = false."
I then went into the /etc/network/interfaces file and added the text starting at "# The primary hard-wired network interface"
/ect/networks/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
# The loopback interface
auto lo
iface lo inet loopback
# The primary hard-wired network interface
iface eth1 inet static
address 192.168.1.4
netmask 255.255.255.0
gateway 192.168.1.254
Then i save that and tried restarting network services. Nothing changed so after changing that file I typed:
ifconfig eth1 192.168.1.4 netmask 255.255.255.0 up
I typed ifconfig and I could see the card was configured with the network address I wanted. Things started to look promising but of course I wouldn't be typing this if I got it working.
So I tried pinging the 192.168.1.4 address from another computer (192.168.1.6) on the same wired network, but If I tried the reverse by pinging that other computer(192.168.1.6) from 192.168.1.4 it would just hang there forever displaying:
frequencydrive@Hacker:~$ ping 192.168.1.6
PING 192.168.1.6 (192.168.1.6) 56(84) bytes of data.
It would just hang there not responding to the ping. I also noticed that I could no longer surf the internet. If I tried going to google immediately after using the "ifconfig eth1 192.168.1.4..." command shown above I could not get anywhere using Firefox. It seemed to lose it's route to the default gateway? If I brought down the interface by typing:
sudo ifconfig eth1 down
I could immediately surf the web.
What the heck is causing all this? I just want a wired network and a wireless network all on the same 192.168.1.x address space.
Some of the things I did I got from this thread:
Trying to configure eth0 and eth1 but Failed to bring up eth1
I've been working on this problem for days. It's so frustrating. Why does networking have to be so hard with Linux?
Thanks for any help.
