CentOS 5 :: Repeated Falls Interface Eth1?

Jul 30, 2010

Looking at my logs note that the eth1 interface falls and rises many times.

.....
Jul 30 04:29:42 localhost kernel: e1000e: eth1 NIC Link is Down
Jul 30 04:29:44 localhost kernel: e1000e: eth1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: None

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CentOS 5 Networking :: Eth0, Eth1, Eth1:0, Route = Get One Gateway For All The Eth?

Mar 4, 2011

I need to setup two ethernets in my Centos box. OK no problem both ethernet and 1 virtual works perfect. eth0, eth1 and eth1:0. I'm trying to set up diferent routes for eth0 and eth1/eth1:0 I need eth0 has a 192.168.1.1 gateway and eth1/eth1:0 192.168.1.100 gateway.I think I've tried almost every thing but always get one gateway for all the eth.These are my config..

/sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:XX:XX:XX:XX:XX
inet addr:192.168.1.168 Bcast:192.168.1.255 Mask:255.255.255.0[code]......

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Fedora Networking :: Why Primary Interface Is Eth1 Instead Of Eth0?

Jan 31, 2010

I have two network interfaces on my computer but only one of them is connected to an Ethernet cable. Until now on every Fedora release, the activated primary interface has been named as eth0 and everything has always worked well without any problem. Recently I switched to Fedora Core 12 and surprisingly I observed that for the first time, my primary interface has been considered by the system to be eth1 instead of eth0. I tried to replace the content of ifcfg-eth0 by ifcfg-eth1, yet system gave me an error that there was MAC address mismatching. I conserved their MAC addresses in their files and just replaced other connection parameters ( such as IP ADDR, NETWORK, NETMASK, etc.) but it did't work. When I do "server network restart", the command blocks.

As I try to install oracle on this system, regarding the fact that oracle requires static network configuration on the primary network interface, I don't know how to proceed in order to set eth0 as my primary interface (or rather set the current eth1 to eth0 because it is actually eth1 that refers to my activated primary network card).Just one more time, I would like to remark, that with previous versions of the Fedora Core, on the same computer (with the very same two network cards) I never had problem and I had installed oracle on the system with success, having the statically configured eth0 correctly detected by the system.

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SUSE :: How To Find Out Physical Interface Corresponds To Eth0,eth1?

Jun 21, 2010

I am in need of finding out the physical interface corresponds to eth0,eth1,eth2., As similar like the lscfg command which is available in the AIX operating system. The output given below got it from AIX OS.

$ lscfg -l ent*
ent2 U787B.001.DNWFFC6-P1-T9 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent3 U787B.001.DNWFFC6-P1-T10 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent0 U787B.001.DNWFFC6-P1-C4-T1 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
ent1 U787B.001.DNWFFC6-P1-C4-T2 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)

Is there any utility/commands available to find out the physical interface ?

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Slackware :: Wireless Interface On Eth1 - Setup Config Files?

Aug 23, 2010

All rc.inet1 an rc.wireless scripts work well if a wireless extension is on wlan(x). My notebook has Intel Pro 2100 wireless adapter (the ipw2100 module). By the system the card is marked as eth1. If you have a look at rc.inet1(.conf) you see that by default an eth1 has no wireless extensions. how to set up my network.

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CentOS 5 Networking :: Installing CentOS 5.3 Netinstall Using Eth1 USB Connection

Jun 7, 2009

I want to install CentOS from netinstall CD, but it doesn't work for wireless connection, because it just looks up for eth0 connection. Well, I connected server to wired USB connection and it's named eth1. I want to use netinstall CD but using eth1 connection. Is there any way for doing it?

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CentOS 5 Networking :: 5.1 Won't Recognize 2nd Nic Card Eth1

Jun 5, 2009

i have installed centos 5.1 but it won't recognize 2nd nic card (eth1). i was unable to install the driver supplied by the cd. i am using intellinet gigabite pci network card. the network card recognize by centos 5.3 but i need to use centos 5.1. i also tried another intel gigabite adopter but it also won't recognize by centos 5.1.

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CentOS 5 Networking :: Change The Primary Nic From Eth1 To Eth0?

May 7, 2009

Centos 5.3 How can I change the primary nic from eth1 to eth0? My board has 2 nic's and I'm having license issues with cpanel

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CentOS 5 Networking :: Eth1 Does Not Seem To Be Present,delaying Initialization?

Sep 24, 2009

I have added a new network card on my Cent OS machine. This is a RTL-8139/8139C/8139C+ card. When the machine boots or I start the network it displays "eth1 does not seem to be present,delaying initialization."I have gone through different posts on the forum with similar problems and have posted output of some of the commandsOutput of lspci is

00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 10)
00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express Integrated Graphics Controller (rev 10)

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CentOS 5 Hardware :: Secondary Ethernet Appear In Lspci But No Eth1

Mar 29, 2010

I have installed a secondary Ethernet card, rebooted, but found no eth1 interface. The output of: lspci | grep Ethernet

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CentOS 5 Networking :: Eth0 Takes Traffic Of Eth1?

Oct 18, 2010

I'm having a problem and despite I have googled a lot cant find the root cause. I have a server with two embedded NICs and centos 5.5 loaded. I need to have one NIC with a fix internal IP address to communicate with the intranet and a second NIC with a fix address from my telephone provider. I know I cant have two different gateways on the net so I configured only the gateway for the second NIC leaving the field empty for the first.

I found that the first NIC is handling all the traffic for both interfaces (eth0 and eth1) and the second NIC is in standby (or doing nothing). This is causing the traffic intended for the second NIC never reach their destination. After a couple days working with the BIOS and other configuration files I tried another way of solve the issue. I put a fix address for the first NIC and another fix address for the second NIC (both in the same subnet) and from a computer pinged successfully both addresses. However if I disconnect the cable for the first NIC both interfaces goes down (eth0 and eth1) and both pings fails. If I disconnect the cable for the second NIC (with the first one connected) both pings still running without any disturbance.

I worked also in a second server with different hardware (different kind of motherboard, different NIC manufacturer, etc.) but the problem is also present in this second server. I was reading about NIC bonding or teaming, but this configuration is not present in the modprobe.conf or in the ifcfg-eth0 files, so I believe the problem is not related with this feature. Do you know what is happening with the NICs and how can I get two really, fully independent NICs?

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CentOS 5 Networking :: Use The Eth1 For That Application And Not The Default Eth0?

Nov 8, 2010

I have 2 network interface on 1 server and i got a problem finding a solution for it.I have 1 java application and i want it to use the eth1 for that application and not the default eth0. On eth0 i got for example xx.xxx.xx.22 and on eth1 i got xx.xxx.xx.23 and i want the java app to use the 23 ip one.

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CentOS 5 Networking :: Cannot Ping From DHCP Client On Eth1

Nov 24, 2010

I have a Lan with 100 computers with microsoft windows xp and vista on it, and I need to build a CentOS Primary domain control- PDC. So I am building a PDC , with samba 3.x +Ldap ( Light Directory Acess Protocol), with static eth0 and DHCP-server( Dynamic Host Control Protocol) on eth1.
Eth0 : 192.168.1.3
Eth1 : 192.168.1.5

Here is the configurations files:
== BEGIN uname -rmi ==
2.6.18-194.17.4.el5 x86_64 x86_64
== END uname -rmi ==

== BEGIN rpm -q centos-release ==
centos-release-5-5.el5.centos
== END rpm -q centos-release ==

== BEGIN cat /etc/redhat-release ==
CentOS release 5.5 (Final)
== END cat /etc/redhat-release ==

== BEGIN getenforce ==
Permissive
== END getenforce ==

== BEGIN rpm -q yum rpm python ==
yum-3.2.22-26.el5.centos
rpm-4.4.2.3-20.el5_5.1
python-2.4.3-27.el5
== END rpm -q yum rpm python ==
== BEGIN ifconfig -a == .....

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CentOS 5 :: Forcedeth Device Eth1 Not Present - Delaying Initialization

Apr 4, 2009

I'm running CentOS 5.2 on an ASUS M2NPV-VM motherboard. This motherboard includes an NVIDIA nForce 430 built-in Gigabit MAC (network interface). I've also installed a second PCI network interface card (NC100 Network Everywhere Fast Ethernet 10/100). The PCI-based card was configured as eth0, while the built-in NIC was configured as eth1. The machine is used as my firewall/router, so eth0 is my internal interface, while eth1 is my external interface. I've had some intermittent problems with the built-in (eth1) NIC. When booting the machine and it attempts to bring up the interface, I get the following message: forcedeth device eth1 does not seem to be present, delaying initialization From that time forward, there is no eth1, and so no external network, etc. If I try running /etc/sysconfig/network-scripts/ifup eth1 (from that directory), it results in the same error.

Originally, I was getting this error when installing the operating system on the machine. At that time, I was using a 75' ethernet cable (as I was working on the machine in my office, and the external ethernet jack was in another part of the house). As soon as I moved the machine to its permanent location (which is within 2 feet of the ethernet jack), the problem went away. However, I just updated the kernel (via yum) from 2.6.18-92.1.22.el5 to 2.6.18-128.1.6.el5, and now it fails 9 out of 10 times. I'm not even sure what I can do to debug this. I'm assuming there is some kind of timing problem with the initialization. Is there a configuration parameter I can set to allow more time for the initialization to do what it needs to do, to prevent this error?

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CentOS 5 Networking :: Unable To Start Eth1 From The Command Line?

May 28, 2009

I am trying to attach my server to 2 diferent networks, with fixed ip addresses,
eth0 = 192.168.0.2 255.255.255.0 with gateway 192.168.0.1. This is currently working, and I can ssh o the machine on this address

eth1 = 192.168.150.5 255.255.255.0 with gateway 192.168.150.1

When I try and start eth1 with ifconfig eth1 up, I get the error message "eth1: unknown interface: no such device"

I have configured eth1 using system-config-network-tui and /etc/sysconfig/networking/devices/ifcfg-eth1 looks correct

GATEWAY=192.168.150.1
TYPE=Ethernet
DEVICE=eth1
BOOTPROTO=none

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CentOS 5 Server :: DHCPD On ETH1: Distribute ETH0-received DNS?

Sep 14, 2009

this should be trivial for all you big sysadmin guys My box is a firewall/gateway. ETH0 is on the Internet-side, and is fully auto-configured (DHCP client) from my ISP. ETH1 is on the LAN-side, has DHCPD enabled, and I route the traffic to/from the Internet via iptables (NATting, of course). Everything works pretty good, except for the DNS-server assignment via DHCP: how can I configure dhcpd.conf to assign the SAME dns-server I receive from my provider on ETH0 to all my PC on ETH1?

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CentOS 5 Networking :: Bridging Of Eth0 And Eth1 Doesn't Work?

Apr 14, 2011

Problem: Can't get bridging to work properly.

I'll start by saying that most of this is built inside of a 64bit ESXi 4.1.0 server. Should be obvious by the picture below.

Trying to set up a bridged CentOS box. Ultimate goal is to set up a Transparent Firewall. The machine labeled 'Desktop' is a Windows XP running DHCP. It gets assigned an Internet routeble IP address. At this point, nothing is running a firewall.

Symptoms:
Gateway can ping CentOS bridge
CentOS bridge can ping gateway
CentOS bridge can resolve DNS names and ping FQDNs on the Internet.
CentOS bridge CAN NOT ping Desktop

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CentOS 5 Networking :: Bcm43xx Device Eth1 Does Not Seem To Be Present - Delaying Initialization

Mar 15, 2009

Ethernet card works, but Wireless card activation fails at bootup time. It also fails if I try it again from the Network Configuration UI.

I have provided some output I got from initial exploration.

I upgraded to a recent version of the 2.6 kernel.

uname -a: Linux localhost.localdomain 2.6.28.7 #1 SMP Sat Mar 14 19:04:11 PDT 2009 i686 i686 i386 GNU/Linux

I have installed the correct firmware hopefully.

cd /lib/firmware ls

Output is:

I do have the bcm* files for firmware.

output of lspci is:

Last two lines show the that Wireless card BCM4312 is visible.

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Networking :: Sending Video Streams From Eth0 And Eth1 To The Other Server Programs' Eth0 And Eth1?

Jul 30, 2010

I try to generate a server client code. What i try to do is sending video streams from eth0 and eth1 to the other server programs' eth0 and eth1. In order to do that, i decided to use SO_BINDTODEVICE. But the code is not working. Am i misunderstood the usage of SO_BINDTODEVICE.

1-Defining two ports
2-Defining two sockets
3-Assigning host ips on them

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Ubuntu :: Falls Asleep While Playing Games

Mar 9, 2011

Whenever I'm playing games using my gamepad, the OS Falls asleep after a while. As if I were doing nothing.

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Ubuntu :: 9.10 - Can't Connect To The Net And Always Falls Back To AutoEth0

Jun 1, 2010

I just upgraded to Ubuntu 9.10 on one HD. Now I have no internet with 9.10. The dsl connection I used to upgrade is still there, the password is correct, but it can't connect to the net, and always falls back to AutoEth0.

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Networking :: Set A Route For Eth1 - DHCP Clients - To Reach Tun0 - Openvpn Server - CentOS

Sep 21, 2010

I have openvpn tunnel setup between two CentOS servers. One of the CentOS servers also acts as a DHCP server for some client computers.

Server A= OpenVPN server
Server B= OpenVPN client (connects to Server A with OpenVPN)

The two CentOS servers can ping each other (172.16.0.0/24) via the tun0.

However, client computer connected to Server B (DHCP server) can't reach 172.16.0.1 (which is the OpenVPN server).

I think I am missing some routing in my "ip route show". Following is the full picture:

What command can I issue to get this fixed? something along ip route add?

There is no firewall service on both end. service iptables stop! I can't bridge eth1 and tun0 as DHCP server might mess up the other side. I can't do a push of "redirect-gateway def1" because then clients loose their IP as they send DHCP requests to Server A.

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Ubuntu :: Conky Falls Into Deep Sleep With USB Mount?

May 1, 2011

I'm experiencing low importance nuisance with conky. I'm running ubuntu 10.10 and use conky to have basic system overview. Whenever I mount/umount USB flash, conky disapears from display. It does not crash, it only falls into neverending sleep (process state: Sl+). When I send rehub signal (kill 1 {conky_pid}) conky happily wake up, reloads configuration and shows me what I want to see. I dont have anything USB realted in my monitor.

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CentOS 5 Networking :: Bridging Interface Using A Customized CentOS Distro?

Jan 18, 2011

ok I am using a customized CentOS distro that is looking for 3 network cards on boot. eth0, eth1, eth2. I do not need eth0 and need to bridge it to eth1.

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Fedora Installation :: X Startup Failed And Falls To Text Mode?

Mar 25, 2010

I install Fedora10 in my computer but when it begins the process of installation, it says that "x startup failed" and falls to text mode of installation. Howerver, the graphic mode works in another computer.

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Networking :: Kernel - Forward Packets From Eth0 To Eth1 And Eth1-to Eth0 As Well As Get A Copy Of These Packets For Analysis

Sep 27, 2010

I have a hardware device with two ethernet ports, eth0 and eth1 running Centos 5. Basically my goal is to forward packets from eth0->eth1 and eth1->eth0 as well as get a copy of these packets for analysis. If I set IP routing to do the forwarding then I won't get a copy of the packets for analysis.

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Server :: DHCP Server On CentOS 5.5 Not Working - When Connect Any Devices To Eth1 They Don't Get Any IP

Dec 2, 2010

I'm no expert on DHCP. My problem is that i have a CentOS 5.5 server on which i want to install a DHCP server. I have two NICs where eth0 has access to the internet and where eth1 should act as an DHCP server.

I have installed dhcpd and this is how my dhcpd.conf file looks like.

Code:

ifconfig looks like this

Code:

When i start dhcpd on eth1 i get no error messages but when i connect any devices to eth1 they don't get any IP. I cant find anything in any logs about devices trying to get an IP address. I dont have any firewall rules in iptables.

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CentOS 5 Networking :: Configure Firewall - Allow And Forward All Traffic On Eth0 And Block All Traffic On Eth1 Except Ssh Ping

Sep 29, 2010

I need to set up my centOS computer as a firewall in my home network. Ive got 2 interfaces, eth0 and eth1. I want to allow and forward all traffic on eth0 and block all traffic on eth1 except ssh, ping(icmp) and DNS. How do I do this? Ive tried some editing in /etc/sysconfig/iptables but no luck.

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CentOS 5 :: GUI Interface On A VM Running CentOS 5.4?

Nov 16, 2009

root@vz03i106 [~]# yum groupinstall "X Window System" "GNOME Desktop Environment"

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons: centosk2.centos.org

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CentOS 5 :: How To See Interface

Jun 19, 2010

I had recently installed centos 5.5 on Distro.But I am not getting how to see interface.
I tried ifconfig and ipconfig both are not working.So please let me know what is command to see interface.

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