General :: Reassign Ethernet Interfaces On Red Hat Enterprise?
Aug 17, 2011
I have two HP servers which have a total of 10 Ethernet ports each, both running RHEL 5.7. I need to make sure that Ethernet ports are mapped to the same devices in Linux on both systems (see below) because these servers must be identical (the second box is a drop-in replacement in case the first system fails).The ethernet ports on the first system are mapped as follows:
Device Port
eth0 Intel Dual Port Card, Port 1 (Rightmost Port)
eth1 Dual, Port 2
We have a server and a target board. Most of the times I am able to mount the server through network file system. But sometimes it is observed that mounting hangs. When this happens, it was noted that both ethernet interfaces are up. Now when I make one down,mount works properly. The interface which I made down was having dummy(default) IP address, gateway etc.
I have an Ubuntu 9.10 machine with three ethernet interfaces, eth0, eth1 and eth2. eth2 is connected to a private network. eth0 and eth2 are connected to two different LANs. Either one will provide access to the internet. All three networks have DHCP servers. Using Ubuntu's the default settings (And Gnome), when I boot up all the interfaces are active and my system gets three IP addresses. However any attempt to access the internet results in connection timeouts and other weirdness.
I suspect that traffic is going out on one NIC (like eth0) and coming back in on another (like eth1). I'm not sure what's going on. The only way I can access the internet at the moment is to bring two of the devices down with ifdown. How can I configure eth0 as my primary interface so all trafic goes out by default on that interface, while keeping the other two active? Also, I want to make sure Avahi broadcasts properly on all three IPs so that the computers on the LAN of eth1 can still connect to myHostname.local...
Here's my routing table: Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 172.16.151.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2 172.16.30.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 10.1.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 0.0.0.0 172.16.30.2 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 10.1.0.1 0.0.0.0 UG 0 0 0 eth1
I want the 172.16.30.2 network to be the primary one and the 10.1.0.0 network to be the secondary one. My nameservers are also incorrect. It seems like Ubuntu is bringing the networks up in order, eth0, then 1, then 2, and the DHCP information from eth1 is overriding eth0, and eth2 is overriding eth1. How can I reverse this so the DHCP information from eth0 is the "master"? This seems to be an issue with Gnome's NetworkManager.
The ethernet configuration files are under "/etc/sysconfig/network-scripts" such as "ifcfg-eth0:1" etc.
The file looks as follow: Code: DEVICE="eth0:1" BOOTPROTO="static" ONBOOT=no IPADDR="172.23.17.10" NETMASK="255.255.255.0" ALIAS="yes"
I've set the ONBOOT=no. This means this device should not be activated at boot-time. But as I reboot the machine, this device is activated again. This means the option ONBOOT doesn't work. Seems this is a bug of RedHat LINUX?
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
I have an old computer on which the backspace key is broken (i.e. it makes no physical connection) and I would like to reassign it to another key. How would I do that?
how do you manually reassign a wireless bridge in xubuntu 10.04.. Or basically configure it without having to do so through the installation process.. Hopefully there are commands for it.
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
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:
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 ?
I have one hard disk partitioned into four logical drives.
1.20gb for red hat 5 //installed after installing window xp 2.40gb for Win xp //Installed first 3.40gb not formatted yet 4.more than 50gb for data storage.
After all the installation,I can just boot Red hat 5 but it shows the prompt for window xp also to boot in boot selection screen.When I entered for window to boot,I have this message-
The solution should be capable to use intranet only (no communication should traverse the inernet). It would be of an advantage if it would support conferencing. And if it's possible it'd be fine if it'd be free.
One solution which comes to my mind is jabber, but I do not have any experience with it... what's your oppinion on that? What other solutions are there?
a Netgear router with DHCP off at 192.168.0.1 my computer
eth0 at 192.168.0.2 wlan0 at 192.168.0.2
The wlan0 interface always connects to the router, while the eth0 interface connects to other computers with crossover and acts as a dnsmasq DHCP server for network boot and installation.
If I use the Gnome NetworkManager to enable both connections, that is, with wlan0 connected to the router/internet and eth0 to another computer, both as 192.168.0.2, I cannot access the internet while eth0 is connected.
Why is this? How can I configure my computer to follow wlan0 for Internet usage, but use eth0 for itself (the latter is working but blocking wlan0).
I am using wvdial to connect to a mobile network (I have a usb modem) and it works fine. However, I wanted to automate the connection a bit (currently I am running wvdial every time I want to connect). I was wandering if there is a way to add this network to /etc/network/interfaces (in a truly Debian way) to have it connect on startup and/or whenever I connect my modem.
I'm often on my corporate network but also need to be on another network simultaneously. At the moment I have to manually switch back and forth between the two. I'm using ubuntu 10.04. I've come across an excellent document that explains how to do this: "Linux Advanced Routing & Traffic Control HOWTO" by Bart Hubert. He mentions:
make sure that your kernel is compiled with the "IP: advanced router" and "IP: policy routing" features
I've downloaded the kernel sources, but I don't find any config options with names like these in them.
So my question is...how can I tell if the kernel I have has these config options. Failing that, how do I build a kernel that does support these things?
Additional use cases for this knowledge. (1) At work with desktop computer plugged into corporate network. Plug 3g phone into USB port. My corporate network wont allow me to access my external servers over ssh, but the 3g phone will. (2) At home on the corporate VPN, but would like to access my other local network computers.
When I run cat /etc/network/interfaces in Ubuntu 11.04 I get the below output. auto lo iface lo inet loopback I don't see the eth0 or eth1 interfaces, but I am able to see them in the Network Tools application. How do I configure the eth0 and eth1 from command line?
This may be a very basic question but I was wondering if there is a way through the command line to find out which interfaces are using dhcp. I'm using Ubuntu 9.10 in case that makes a difference.
i am suffering from very strange problem.i am using red hat and my mouse right click is not working in it.my mouse is ok i have checked it on windows system
I am using a Red Hat enterprise server 5.0 I would like to know if there is a way to extract a single file from inside a war file and display its contents on the screen? For example: I have a file labeled test.war and inside this war there are multiple files/directories. I am interested in seeing the contents of one file labeled MANIFEST.MF without having to unzip the entire war file. does it make sense?
I successfully install vnc server and client in my machine after installation in GUI mode i clicked on service and enable vnc server when i click on start. It says that "This service is being refreshed right now" Then after i use terminal and typed "#service vncserver start" its display error message "Starting VNC server: no displays configured [FAILED]"
I just installed Oracle Enterprise Linux 5.x on my laptop from an iso file. But I cannot browse internet from firefox (tried to connect internet from a wire connection), and cannot ping a website.
