Red Hat / Fedora :: RHEL 5 Dual Networking - Ethx (0,1) Devices Are Brought Up Be Changed At Boot Time
Jun 3, 2010
I'm having an issue with dual networking on RHEL 5. My initial question is can the order the ethx (0,1) devices are brought up be changed at boot time, so I could bring up eth1 before eth0?
Some background: eth0 is DHCP'd and using DNS, basically this is my primary network. eth1 is an isolated subnet, with a manually configured IP which has no connection to eth0 or the outside world. When I bring up networking it first brings up eth0 and then eth1, what happens is eth1 becomes the 'primary' network of the host and I lose my connection to DNS/NFS/NIS and the outside world.
If I login and manually bring up eth1 first, then eth0 everyone is happy and connections work. So, I'm looking for a solution to either bring up eth1 before eth0 or somehow make eth0 my primary IP and not have it be clobbered by eth1.
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Jul 24, 2010
Missing ifcfg-eth[2-5] fileset for ZNYX 345Q Quad Port 10/100 cards. I have showing in the gui network device that my ports for my ZNYX ZX345Q Quad Port card my ports are Auto eth2, Auto eth3 etc. My Motherboard and Intel cards show as System eth0 and System eth1.
There ARE corresponding entries for those in my /etc/sysconfig/network-settings/ directory, but there are not ifcfg-eth[2-5] files to correspond to these adapters. Can I just write my own files and that will do it?
How does Fedora 12/13 load these drivers into the kernel without having these ifcfg files?
I'd love to know if there is another way Fedora controls NICs / other system resources.
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Dec 23, 2008
I boot linux off a USB stick on many different computers with different hardware. How can I determine in a script which devices eth0, eth1, wlan0 exist and which hardware devices they apply too? Sometimes a wireless card is wlan0, other times it is eth1 or even eth3! The proc/net/dev file does not inidicate which hardware is installed.
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Feb 25, 2010
I'm having a problem installing RHEL-5 on my system. I have Windows 7 installed so far on a Dell XPS workstation that came with hardware RAID 0. I have 2 x 500 gb hard drives. So I went in Win 7 and partitioned my disk to leave about 75 gb of unallocated space to install RHEL-5 on. I load the RHEL-5 DVD into my disk, restart my comp, and just follow installation steps. Use about 73 GB as an ext3 partition for the RHEL-5 and have about 2 GB reserved for swap space. RHEL-5 installs, and I'm all done. However, when I reboot the computer, the GRUB boot loader fails to load. I'm directly taken into Windows. How do I recover GRUB so I have the option of loading into RHEL-5?
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Mar 4, 2010
I am having dual boot system(windows 7 and Fedora 12).When i switch on my system.It show the the timer 3 sec in order to get boot selection window(means window which asks that what to start fedora 12 or windows 7).I want to increase this time from 3 to 10 sec.
[URL]
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Sep 25, 2009
Environment:RHEL 5.2 and 5.4 AP x86_64, 2 drives (sda, sdb), installing without optional features like clustering and virtualization. I have tried this for a couple of days now and just can't get it to work. My goal is to take the RHEL 5.2 DVD and RHEL 5.4 DVD and install them on separate drives of the same machine. I want the grub menu to give me a choice. I prefer to understand the steps and choices offered me by the install dialog to do this rather than fiddle with grub.conf. If that is not possible, I will write up the bug.
So far, I just get the the error 13 when trying to start the grub added second OS. I have read elsewhere that "Anaconda frequently recognizes the other operating system and sets up grub so you can boot from either operating system". That would be nice. The install dialog lets me choose a drive to install to. I have figured out that I need to check "review and modify partitioning layout" to enter the advanced grub choices. Do I have it install a boot loader for the 1st OS? Trying to add the 1st OS during the second OS install creates a grub conf with no kernel line in the added boot stanza.
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Jan 24, 2010
why, after booting to windows for any length of time that upon rebooting to Fedora the system time is 3 or 4 or 6 hours off? Sure, it is easily fixed with ntpdate but is there a more permanent fix?
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Nov 24, 2009
The time in my Fedora 12 x64 installation is 5 hours behind what it should be. When I change it to the correct time, Windows XP x64 is now 5 hours ahead! (Dual boot setup). How I can sync the times on both os's. Both are set to GMT-5.
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Mar 27, 2009
I have installed Fedora10 on my PC which had an XP. Now Fedora waits just 2-3 seconds to press any key to choose between XP and Fedora. Actually if I don't press any key it automatically begins Fedora. How can I increase this time interval?
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Apr 20, 2010
I am trying to find out the command to list all the devices mounted at boot-time.
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Aug 12, 2010
I am running RHEL 5 on Vmware Workstation. That is i inslled Vmware Workstation on windows 7 and then in Vmware i installed RHEL 5 as a virtal machine. By mistake i made some wrong entry in my /etc/fstab file that is i was trying to automatically mount one folder under another folder. My syntax was wrong. So when i restart my RHEL 5 , at the boot time due to wrong entry in /etc/fstab system is giving file system error as follows:
Checking filesystems
fsck.ext3: Unable to resolve 'LABEL=/home/download'
fsck.ext3: Unable to resolve 'LABEL=/var/ftp/uploads'
[FAILED]
[code]....
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Jan 7, 2011
I'm having an odd problem with Server 10.04. I have two interfaces but only one interface is brought up on boot - and it's not always the same interface. Usually eth0 fails and eth1 comes up fine, but sometimes eth1 fails and eth0 comes up. I'm using the same config that was previously used on Server 8.04, but never had this problem on 8.04.
/etc/network/interfaces:
Code:
# The loopback network interface
auto lo
iface lo inet loopback[code]....
Once the system has booted, if I run /etc/init.d/networking restart, then both interfaces come up fine. However, having read that this is now an upstart, I also tried service networking restart, but get:
Code:
restart: Unknown instance:
Don't know if that's significant or not.
Cannot find a single problem with networking reported in log files, other than bound services failing to start as a result of the interface not being up (dansguardian, squid, dhcp which are all bound to eth0, and therefore fail when eth0 doesn't come up. And when eth1 doesn't come up, the only process that fails to run is clamav-freshclam). Although at one point I did see something about interfaces being renamed which seemed a little odd.
I could just have networking restarted automatically once booted, but this obviously isn't a solution to whatever is causing the problem. There is quite a bit running on the server: Samba/LDAP domain controller with roaming profiles, squid & dansguardian with LDAP auth, postfix & dovecot with LDAP auth, mailscanner, dhcp & ddns, strict iptables policy with nat... so I'm not sure if any of those could have any bearing on interfaces?
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Jun 27, 2010
my system time is getting changed automatically(4 hours delay) even if i set the correct time zone. hw can i resolve it?
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Jun 5, 2011
I have made a CentOS AMI Image for Amazon EC2 Now the network is starting but it doesnt even try to determine the IP :
Bringing up interface eth0: [ OK ]
BUT if I hit the ifconfig :
eth0 Link encap:Ethernet HWaddr 12:31:39:0A:99:F8
inet6 addr: fe80::1031:39ff:fe0a:99f8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[Code]......
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Feb 27, 2010
new Install of 11.2 every time i boot i have to config network devices via Yast Control Center. I now have 8 eth configs for my one local net adapter. Why does the MAC address change each time? I cant use my routers built in MAC filter and MAC control functions if this keeps changing. So each time i boot i need to also go into my router and build a new MAC address profile based on the new MAC address before i get Internet access. Security to the point of no access...I hope this is just a bug in the system. I thought MAC addresses were firmware/device specific? What I need is one eth config that works each boot. And I need one MAC address that does not change between boots.
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Jun 21, 2011
I am using the default CVS available in Fedora 9. I initiated the CVS server by
cvs -d /usr/local/cvsproj init
To check-in and check-out the following exports commands are used
export CVS_RSH=ssh
export CVSROOT=:ext:swathi@SERVER:/usr/local/cvsproj
I shall explain problem by taking an example. A project was checked in long before (for example the checkin date is 25 Feb 2010). And today (i.e. 21 June 2011) I checked out the project from the repository. After checkout, the date of the project in the repository is changed from 25 Feb 2010 to 21 June 2011. This date is set to all the subfolders in that project. But the files in the project retains the checking date i.e. 25 Feb 2010. Why the check-in dates are getting updated/changed to the system time after doing check-out.
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Mar 21, 2011
I want to install Scientific Linux 6 (RHEL 6 recompiled) and Fedora 14 KDE (side by side). Any step by step procedure to do so. Insofar I've failed dual boot any 2 fedoras.(I've heard that there is an issue with grub legacy, it can't dual boot .. is it so? hard to believe! So far I first installed SL 6 , installed its /boot on MBR and then installed Fedora KDE on other drive and installed its /boot on some other drive ... can't dual boot only getting SL 6 at booting. For both os I was using lvm for their primary drives.
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Nov 5, 2010
I have installed Ubuntu 10 alongside with Windows XP. Consequently I need to make a choice at boot time. However, I feel that the system is not waiting very long, maybe 5 seconds or so, before going automatically into Ubuntu. Can that time be increased? If so, where or how?
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Nov 2, 2010
I need help to run dual head (extended mode) on top of the followings.
1. RHEL 4.2
2. graphic card in Intel 945GM chipset
Anyone to guide me the driver and the configuration I should use.
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Oct 19, 2010
I know this might sound stupid, but how do I change the time delay for a dual boot?
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Nov 9, 2010
I'm running a dual-boot; Lucid and Win XP on a HP Pavillion.My time settings are about 8 hrs off between the two operating systems. If I correct the time in Linux, it will be wrong when I boot in Windows. If I correct it in Windows, it will be wrong again next time I boot into Linux.Besides the obvious solution of removing Windows from my machine (which I'm not ready for), what should I do to fix this?
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Apr 8, 2011
Do you know what's relationship between ethx and physical net cards? such as i have three net cards in the PC, named A, B, C. In which config file i could know that eth0 -> A, eth1 -> B, and eth2 -> C. Would the mapping relationship change after reboot? Is there any method i could change the mapping?
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Jul 30, 2010
I had to boot into my Windows 7 install on my laptop for the first time in a few months and I noticed that the Windows clock was 4 hours ahead. Windows sync'd its time with the internet, then I booted back into Debian (Lenny) and my clock was now 4 hours behind. Both OS's are set to the same time zone (EDT). The minutes were correct in both systems. Could the fact that EDT is UTC-0400 be relevant?
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Mar 6, 2010
Arpwatch is failing to start at boot time. I got this message:
arpwatch: bad interface eth0: eth0: no ipv4 address assigned
Once I login into my account, I can (as root) run the arpwatch demon, but it is suppose to run at boot time. After I installed aprwatch, it was working correctly. I do not have an idea of what happens or since when the problem start to happen. I just realize, after a while , that arpwatch was not running. I am running Fedora 12 - 2.6.32.9-67.fc12
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Aug 20, 2010
I'm not consistently able to boot into Ubuntu Lucid on my new dual boot (w/ Win7) setup. Machine is a Dell XPS 1645 laptop. Usually it takes 1-3 tries of hard shut down and restart before the OS starts up. Boot info script results are below. Windows starts up fine everytime. What I usually get is this: Dell startup screen, then Grub2 menu, then after selecting Linux kernal a blinking cursor at upper left of monitor and it just hangs.
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Mar 23, 2011
I was struggling how to phrase the question (in the subject) so let me clarify... I wish to install Windows 2000 and then do Ubuntu, on the same PC. I never had a dual boot before but I understand that it goes automatically (after a short time) to default Windows if Ubuntu is not chosen (on the boot up screen), correct? If so, if there's a "countdown" of sorts, is there a way to disable it? I wish to have control over that aspect, have unlimited time during that boot "choose one" screen.
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Apr 7, 2010
If i boot to fedora and boot back to windows i can no longer can access network/internet on windows! It says the network is disconnected. The cable is connected properly and this message is happening only because i booted to fedora 12 previously before booting into windows.
I did not have this problem with fedora 10, 9. recently i did an upgrade to 12 and this is one of the problems among the many other i am facing. In order to get internet back on windows i have to shutdown the pc and wait for a while and power on again to get network back on windows. the same issues exists on windowsXP64 and vista32.
I am connected to the internet like this pc->Realtek RTL8168D(P)/811D(P)->linksys router connected to pc by network cable --> DSL modem. the router connects to DSL by ppoe
My router's ip is 192.168.0.1. usually if i type this on my browser it will take me to the routers configuration. But a previous boot to fedora and i cant even access my router. its like it says "network disconnected".
why is fedora messing up my network connection? its pathetic that there is no OA in linux and it makes my life miserable.
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May 2, 2010
I have recently set up a dual boot comp running Windows 7 and Fedora 13 (test) and began noticing that after a short while,was taking forever to access web pages. When I look at my router which is running DD-WRT I noticed my active connections was over 500 whereas should only be around 200 maybe or less. This does not occur under windows,so am not sure where to begin.box is running 64 bit quad core processor.
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May 22, 2010
how are nics assigned - eth0 - ethx I am having problem with my distro randomly assigning nic to different ethx after each reboot. Sometimes nice 1 is eth0 and sometimes is eth3.
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Sep 25, 2009
When booting Fedora 11, my system hangs for a very long time on starting udev. Sometimes I get an I/O error. However, my hardware is fine. I do eventually get in to the system.
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