Ubuntu Networking :: /etc/network/interfaces Not Accepting More Than One Config Per Interface

Feb 3, 2010

My old /etc/network/interfaces isn't working in 9.10. I've used it from 8.04 to 9.04 without issues.

I need to make multiple configuration per interface:

Code:
auto lo
iface lo inet loopback
auto lo:1

[Code].....

If not how can I downgrade the program responsible for reading this file?

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Fedora Networking :: Enable 3 Interfaces \ When Start One Interface The Another Interfaces Goes Down?

Jan 25, 2010

I have 3 Interfaces for a different LAN's and when I start one interface the another interfaces goes down.How can it's possible?I configure my ethernets as:

Code:
/sbin/ifconfig eth0 172.16.3.108 netmask 255.255.0.0 broadcast 172.0.255.255
/sbin/ifconfig eth1 172.16.3.109 netmask 255.255.0.0 broadcast 172.0.255.255
/sbin/ifconfig eth2 172.16.3.1110 netmask 255.255.0.0 broadcast 172.0.255.255

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Ubuntu Networking :: Adding Interfaces To /etc/network/interfaces?

Apr 16, 2010

If I try to add a new interface (eth1) to /etc/network/interfaces, I get

Code:
* Reconfiguring network interfaces... SIOCSIFADDR: No such device
eth1: ERROR while getting interface flags: No such device
SIOCSIFNETMASK: No such device

[Code]...

How do I add 2 interfaces and get anyone of them to work, as available ?

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Networking :: Prevent Auto Up An Interface At /etc/network/interface File ?

Jul 18, 2011

I have a ppp0 entry with post-up options like this

mapping ppp0
map none photon-plus motorola
map timeout: 12

[code]...

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Fedora Networking :: Setup The Network Scripts To Create Two Network Interfaces For Vlan X And Y?

Apr 7, 2009

Using Fedora 10, can anyone tell me how to setup the network scripts to create two network interfaces for vlan x and y. Both interfaces should obtain an ip from dhcp and both interfaces should run over eth0.

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Red Hat :: Networking - Setup Network Scripts To Create Two Network Interfaces For Vlan X And Y

Apr 7, 2009

Can anyone tell me how to setup the network scripts to create two network interfaces for vlan x and y. Both interfaces should obtain an ip from dhcp and both interfaces should run over eth0.

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Ubuntu Networking :: Startup Networking Automatically Using /etc/network/interfaces

Jul 2, 2010

I'm on an embedded system that doesn't have Gnome, and I'm trying to startup networking automatically using /etc/network/interfaces. Here's what I have.

[Code]....

eth0 comes up just fine. wlan0 comes up, but it's unable to acquire a DHCP address. I added the following lines to /etc/rc.local, and wlan0 comes up all the way, but I'm not too crazy about this hack.

[Code]....

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Ubuntu Networking :: Set Up Two Network Interfaces In Laptop

Jan 16, 2010

I am currently trying to set up two network interfaces in my laptop. The wireless connection wlan0 works fine and it's the one that I use to connect the internet. It's in the range of 192.168.0.x/24 (gateway: 192.168.0.1). The wired interface eth0 is connect to another router (gateway: 10.0.0.13 with IPs in the range of 10.0.0.x/24. The router is set up to work as an AP and the 10.0.0.x network will only be used to control a robot, so no internet access will be required in this network. The problem is that when I have both connections up, I can't access the Internet anymore. I can still ping both routers, I can enter both routers configuration pages but I can't connect to the Internet. If I unplug the network cable, Internet gets accessible again.

I'm still a novice in linux and I can't figure out how to fix this. I don't want to get into static ip for the wireless connection since I'm constantly using the laptop in different places. The objective is to use the 10.0.0.x router to have a development platform for the robot that can be used anywhere without having to reconfigure the robot for a new network, which is a real pain.

In detail, the laptop connects via wireless to the network with intenet (192.168.0.x) and also connects via cable to another wireless router(10.0.0.x). The wireless connection of the second router is used to connect to the robot. Since I can ping both routers when they're both connected, I think it may be something related to the ip routes. I'm using Ubuntu 9.10 with kernel 2.6.31-17-generic

[Code]....

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Ubuntu Networking :: Why Etc/network/interfaces Does Not Contain Eth0

Jan 1, 2011

So far as my knowledge goes, /etc/network/interfaces is supposed to contain a list of all the available interfaces. But my /etc/network/interfaces looks like this,auto loiface lo inet loopbackBut I have a perfectly working eth0 connection. Why does not it appear here?

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Ubuntu Networking :: Fixing Network Interfaces

May 27, 2011

I accidentally killed the dhclient processes. I am unable to access the Internet wirelessly or with Ethernet. It's a little irritating because now I have to post this using my phone. I'm looking for a way to reformat the network files to how they looked when I first installed ubuntu. I don't know quite what these are, or really anything about it.

The /etc/network/interfaces file has the following information:

I'm pretty sure there's supposed to be more.

iwconfig typed into the terminal gives me this:

According to lshw, the logical name for my Ethernet interface is eth1. I think it used to be eth0. It's an 88E8055 PCI-E Gigabit Ethernet Controller.

The wireless interface has logical name wlan1. I think this used to be wlan0. It's a PRO/Wireless 3945ABG [Golan] Network Connection. The driver is iwl3945 - [phy0]

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Networking :: Network Interfaces Is Not Configured?

Sep 29, 2010

I have installed Debian 5 and dident configure the network interfaces at installation.Now i am not able to connect to the internet through Ethernet or Wireless. How do i configure the interfaces after installation ?PS. the interfaces show up as "Not configured" in the network manager

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Ubuntu Networking :: Set The IP In The /etc/network/interfaces File And Reboot?

Jan 20, 2010

DSL modem is a Speedstream 6520 router. All computers work fine via dhcp. I'm trying to setup a small server (print server, ssh & ftp servers). I understand enough of the software part of things to get it going, my problem is setting a static IP on the server box. Every time I set the IP in the /etc/network/interfaces file and reboot, I have no network connection. I can talk to the modem through the browser, but nothing beyond that, not even local computers.

/etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 192.168.254.202
network 192.168.254.0
netmask 255.255.255.0
gateway 192.168.254.254

ifconfig shows the .202 address, but box can't get to the outside world, and can't ssh into the box from a computer sitting next to it. If I let it dhcp, then I can ssh into it, and have access to the internet. In the modem, I have dmz set for that address. Wan address is static. I can ssh into it if I let it do dhcp, so I know it can work that far. But if I set static ip, I might as well pull the network cable. I've been beating my head on this for over a week, and I'm lost why I can't get it to work. I even changed the dhcp range on the modem, so the .202 is not in that range. There is no dhcp client installed that I can find. I'm using WattOS beta3, which is a light distro based on 9.04. The computer is an old Dell GX150, integrated nic. I have done ifdown and ifup eth0, still no happiness. Doesn't seem like it should be that hard, but I'm stumped. DMZ should let everything pass, so don't need to mess with port forwarding and such. I know it works using dhcp.

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Ubuntu Networking :: /etc/network/interfaces Not Booting On Startup?

Sep 23, 2010

When I boot into Ubuntu with the Xfce desktop then proceed to terminal to check my IP it is always some random IP as provided via DHCP by the router. If I then go to the cmdline and type sudo /etc/init.d/networking restart then the wifi correctly connects to the router to the one static network address that I have specifically provided for it - as stated in my interfaces file. Why is this not happening on startup?

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Ubuntu Networking :: Multiple Interfaces In Network Manager Have The Same Name

Apr 7, 2011

I have a problem where multiple interfaces in my network manager have the same name. This means that I am unable to have different settings for each interface. Here is my setup:

Ubuntu 10.04 LTS
uname -a: Linux muon 2.6.32-30-generic #59-Ubuntu SMP Tue Mar 1 21:30:21 UTC 2011 i686 GNU/Linux
Adapter 1: 02:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet Controller (Copper) (rev 03)

Adapter 2: HTC Desire tethered via USB. When I start from scratch, with no remembered networks in the network manager, the Ethernet is shown as "Auto Ethernet". When I then connect the HTC Desire, the new network is shown in the network manager also as "Auto Ethernet". Previously, when I right clicked on the network manager and selected "Edit Connections", there were multiple "Auto Ethernet" entries under the wired tab.

Now (and I do not know what changed, sorry), I only see one entry. When I edit this entry (say, add a route), then the route is added for both network interfaces. This used to still work, so I was not worried about the name clash, but now it is causing problems so I need to have a different name for each network interface.

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Ubuntu Networking :: ADVISEADDR: Error In Specifying Interfaces: No Existing Ip Interfaces Found

Jan 7, 2010

I have a weird issue that I have not seen on any forum. My jaunty on DELL studio laptop seems connected to net, but I can not access any network service (ssh, firefox etc.). But when I connect a cable the cable lights blink as it should be and in wireless connection my wifi light blinks.

It was working 2 days ago without problem, and I have not done big changes recently.I removed and reinstalled network-manager and network-manager-gnome. Nothing changed. I see a message in each restart as follows (when Openafs is starting). I can reproduce it with "/etc/init.d/openafs-client restart"

Code:

ADVISEADDR:error in specifying interfaces: no existing ip interfaces found

#lspci

Code:

04:00.0 Network controller: Intel Corporation Wireless WiFi Link 5100
08:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5784M Gigabit Ethernet PCIe (rev 10)
#lshw -c network

[code].....

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Fedora Networking :: What Happens With Multiple Network Interfaces

Apr 30, 2009

What traffic goes where? Why? Any bandwidth advantage? What if one goes down?

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Networking :: Filtering Traffic On Network Interfaces?

Feb 8, 2010

I am manually capturing and injecting Ethernet traffic (using lib_net/lib_pcap libraries) for an application. At the moment , both capturing and injecting are done on the same physical interface (e.g. eth0). The problem is that all the traffic that I inject, are captured again by my application causing an unwanted feedback of injected traffic. This caused that I had to implement traffic filtering when capturing traffic, which is consuming resources and eventually will become too complicated to support.

I have tried using virtual interfaces to separate the capturing and injecting streams, but that also presented the same problem as all the traffic from eth0 is forwarded to both eth0:1 and eth0:2. If possible I would like both streams to go through 1 physical device, using more PDs will be the last resort. I am also looking at using TUN/TAP devices to try and separate the two streams, maybe writing a user-space program that lies between the physical device and the TUN/TAP devices to do the routing of traffic.

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CentOS 5 Networking :: Where Are File /etc/network/interfaces

Jan 15, 2010

I work now with Centos 5.4 and I would like configure my Ethernet, but I can't find the /etc/network/interfaces like in CentOS 5.2.

[root@headnode1 etc]# uname -rmi
2.6.18-164.10.1.el5 i686 i386
[root@headnode1 etc]#

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Ubuntu Networking :: Network Interfaces Stop Working After 5 Minutes

Feb 3, 2010

My network interaces stop working after 5-10 minutes of operation. I have 2 network cards, one static IP and the other dhcp. Sometimes I can ping my router, other times I can't.

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Ubuntu Networking :: No Network Interfaces (neither Ethernet, Nor Wireless) Detected?

Mar 2, 2010

Problem:I got a new Acer Aspire 8935G notebook, installed Ubuntu 9.10 on it and everything is fine, except the fact, that it wont detect any network interfaces (or how to call it So there are no ethernet or wlan connections available in the network-manager..

lspci gives me following lines:
joe@IGNAZ ~ $ lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev

[code]...

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Ubuntu Networking :: Multiple Network Interfaces (one Connected At A Time)?

Oct 15, 2010

configure a server with two network interfaces? This system is physically moved from one network to another every few days (different buildings but connected by a VPN). I'd like to be able to control the IP address of the system depending on which port I plug the network cable into with a static setting. Right now the system will connect to the local network, but any requests to go beyond the subnet get lost. The only way I can get the system to talk outside of its subnet is to comment out the second interface.

/etc/network/interfaces:

auto lo
iface lo inet loopback
auto eth0

[code]....

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Fedora Networking :: Change Network Interfaces Names?

Dec 11, 2009

I found problem in FC 12 release. I installed fc 12 to server (earlier there was FC 7). Then as always i realised that names of interfaces (eth0, eth1, eth2 .... eth9) changed after install. eth0 became eth9, eth1 became eth5 ... Earlier on previous fedora releases i solved this problem correcting HWADDR in ifcfg-eth files, so i linked MAC addresses to names (eth0, eth1, eth2) as i wanted in a right order. Now I can't do this. After correcting these files and restarting network sevice i constantly get a message: device ... has different mac than expected. I looked ifup-eth file and compare it with the same one in fedora 7. And i found that in fedora 7 there is function rename_device which processes if HWADDR value doen't coincide with real mac address value. See code:

# remap, if the device is bound with a MAC address and not the right device num
# bail out, if the MAC does not fit
if [ -n "${HWADDR}" ]; then
FOUNDMACADDR=`get_hwaddr ${REALDEVICE}`
if [ "${FOUNDMACADDR}" != "${HWADDR}" ]; then
curdev=`get_device_by_hwaddr ${HWADDR}`
if [ -n "$curdev" ]; then
rename_device "${REALDEVICE}" "${HWADDR}" "${curdev}" || {
echo $"Device ${DEVICE} has different MAC address than expected, ignoring."
[Code].....

But in fc 12 release there is no function rename_device!!!!!!!!! So in this case if HWADDR value is not the same as FOUNDMACADDR value (which equal to REALDEVICE mac address) i just get an error message So I can't change interfaces names, as result i can't organize right order of network interfaces as it was earlier on fc7.

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Networking :: Make A Network Interfaces Configuration Immutable?

Mar 24, 2011

Similar to the linux command "chattr +i filename", I would sure like to set my eth0 interface immutable. so once I assign the eth0 interface's IP and gateway, make it stay set until I say otherwise.

this way, I can run dhclient or Networkmanager on another interface without having to fret that it may alter this interface. is there something out there that can do this?

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Networking :: Multible Network Interfaces, Router Settings?

Nov 19, 2010

I have a Debian machine up and running with tree network interfaces. This is what i want it to work with.

eth0 = dhclient from ISP (external)
eth1 = acting as dhcpserver with iptables, for sharing eth0 to "int network A)
eth2 = dhclient to connect to an netgear router that has similar ip adress suffix as eth0

[code]....

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CentOS 5 Networking :: Which File Can Setup Up Network Interfaces

Jul 20, 2009

which file can setup up my network interfaces? i was able to setup the nameserver using /etc/resolv.conf but I cannot find anywhere to configure the ip and and gateway. I could't find /etc/network/interfaces as you do on Debian

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Fedora Installation :: Can't Config The Network Config ( IP Address ), Due To The Error Of Network Manager?

Jan 17, 2010

When I install the FC11 by using"Install or upgrade an existing system"or"Install system with basic video driver"mode...Point 1, I can't config the network config ( IP Address ), due to theerror of network manager...Point 2, I can't enter into the text mode to do the installation steps.Remark:The machine is provide Web,DNS, and Mail Server on the NET ( Internet )

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Ubuntu Networking :: Connect To Wireless - Settings In The /etc/network/interfaces Are All Messed Up

Feb 17, 2010

the default for /etc/network/interfaces? I believe I screwed it it up because I can detect my wireless, it just won't allow me to connect to it. The settings in the /etc/network/interfaces are all messed up. I'm running Ubuntu 9.10.

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Ubuntu Networking :: Configuring The Network Interface Via Dhcp - Network Messages - Code: 00 55 89 E5 0f 1f 44 00 00 Fa 5d C3 90 8d 74 26

Apr 7, 2011

I am totally new to Linux and have just installed ubuntu 10.10. After configuring the network interface via dhcp I started getting these messages that come in so frequently I can't configure anything else.

[87.186415] Stack:

Why I am getting this messages and more importantly how do I get rid of them.

The installation is on a VM on Hyper-V.

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Fedora Networking :: Two Network Interfaces - Setup Default Gw Route?

Mar 26, 2009

So I have two network Interfaces

eth0 - NAT behind a router
eth1 - Public IP

When ever I restart the machine, both interfaces pull a IP, but the it randomly chooses eth0 or eth1 to have the gateway. I want the gateway to be eth0 always.

[Code]...

Is there some file or setting I can modify in Fedora10 that will always choose 192.168.1.1 on eth0 as the default gateway?

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Fedora Networking :: Set Up Multiple Virt Interfaces In Network-scripts?

May 15, 2009

if I want to do eth1, eth1:0, eth1:1 etc and automatically configure them at startup where do I put that in the network-scripts?

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