Server :: Channel Bonding On NICs From 2 Different Machines With RHEL5.5?

Aug 3, 2010

I am currently investigating channel bonding for rhel5.5.Is there any way I can create one bond from nics on two different linux machines.They will be a cluster without any clustering software like beowulf or LVS.There will be a cluster interconnect through which they can communicate.Should I tweak the bonding module??

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Ubuntu Installation :: Bonding Multiple Wireless NICs?

Nov 20, 2010

I have an Asus R1F laptop with a build in wireless card. I also have 2 USB dongles that we used to use old desktop machines. All of the cards work fine in Ubuntu. I'm running Ubuntu 10.10, 2.6.35-22-generic-pae.

The problem is that I have really bad signal on my side of the house and the connection is dropped quite often. I've tried just connecting on the devices at the same time, they all connect fine but nothing actually works. I read about bonding interface cards on this blog and that would solve all my problems - if a usb dongle could act as a backup for when the normal connection is dropped and while it is reconnecting.

I tried what was written and also did some Googling, but every way that I try seems to work fine until 2 wireless devices are bonded. When that happens they both disconnect and reconnect like crazy. This happens both with and without network manager running.

Build in card[wlan0]: Intel PRO/Wireless 3945ABG
USB[wlan1]: Cisco LinkSys Compact Wireless-G USB Adapter
USB[wlan2]: Realtek RTL 818713 WLAN Adapter
I load the module:
modprobe bonding mode=1 miimon=100 downdelay=200 updelay=200


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Networking :: Channel Bonding Or Aggregation On Latest Fedora Release 14?

Nov 11, 2010

On my previous release *cough* if inenslave was needed, bonding instructions didn't work through aggregation did.

cat /etc/network/interfaces
auto lo
iface lo inet loopback
auto bond0
iface bond0 inet static
post-up ifenslave bond0 eth0 eth1
pre-down ifenslave -d bond0 eth0 eth1

#auto wlan0
#iface wlan0 inet dhcp
#wpa-conf /etc/wpa_supplicant.conf

For some reason the unmentioned former disto, I could not get wireless networking under this configuration and a simple wlan0 interface, in case either cable were to sever it would retain a wireless. The bonding was done for speed, and I believe I can't get faster than mode=4.

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Networking :: Unable To Ping/ssh/connect Channel Bonding From Different VLAN?

Feb 26, 2011

I just setup a new LAMP server (CentOS 5.5 x86_64) box with channel bonding on NetXtreme II BCM5709 Gigabit Ethernet (IBM x3650 M3). The problem is I wasn't able to connect to this server when I'm in different VLAN's. This server also unable to ping different VLAN's. But everything works fine when I transact in the same VLAN.Here's the config:

Datacenter VLAN = 9
Firewall = Disabled
SELinux = Disabled


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Networking :: 2 Nics And Bonding - "select" The Right Path In Order To Reach The Radio Streaming

Aug 5, 2010

On my computer i have 1 network card and 1 USB modem for Mobile Internet. I can access internet using both devices, but when i am using the network card i am unable to listen to radio stations because the radio streaming is not allowed at the work place. So, i am triyng to find a solution and the solution seems to be to use the bonding module on linux. But i have a few question:

1) i don't know if it is possible to use this module for 2 such different devices
2) i don't know if, even enabling bonding, i will be able to "select" the right path in order to reach the radio streaming , or if the right path is selected automatically. When i connect to the radio station using the network card, it opens the connection, but it closes it imediately and i am not sure that the kernel is clever enough to use the other connection in this case.

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CentOS 5 Networking :: Dual Nics - Accessing Machines On WAN / LAN

Feb 23, 2010

My setup is as follows:
eth0 - lan ip
eth1 - WAN ip

I have installed a sip server on the box. From the box I would like to access machines on wan and lan. First of all, is it possible? If yes, I have setup up the nics with default wan gateway. However, when I try to ping wan url, no response. Are there other things I need to do to accomplish this?

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Debian Installation :: Get Preseed Working On A Bunch Of Machines With Multiple NICs?

Mar 15, 2011

I am trying to get preseed working on a bunch of machines with multiple NICs but it doesn't pick the right interface and/or gets "no link" on all interfaces. My PXE kernel line looks like so (I have auto=true priority=critical and interface=auto)

label squeeze
kernel debian-installer/squeeze/i386/linux
append vga=788 initrd=debian-installer/squeeze/i386/initrd.gz auto=true priority=critical ramdisk_size=10800 root=/dev/rd/0 rw interface=auto netcfg/dhcp_timeout=60


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General :: Add Machines To Netgroup In RHEL5 Just Like Jumpstart In Solaris

Aug 30, 2010

I was wondering if in RHEL5_3 if you can add netgroups to your kickstart file like when you are jumpstarting Solaris boxes? Trying to see if I can have a group of machines use a certain DHCP or DNS server during my kickstart.

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Server :: How To Check Ethernet Bonding

Aug 26, 2010

I want to check , whether ethernet bonding is done in a few linux boxes running on RHEL5 and freebsd . am using the following command to check them as well.


Is it ok , or is there any other place i need to look for ?

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Ubuntu :: Dual Channel Failure & Single Channel Errors

Jun 25, 2011

PC seems to run fine in single channel mode but monitor reports no input in dual channel mode and memtest86+ lists from 1-3 errors per pass in single channel mode. Motherboard (Gigabyte P43T-ES3G) can't be set for the 1.65 volts required by the RAM (2x2 of OCZ3P1333LV4GK PC3 10666). The mobo voltage choices are 1.6 or 1.7 volts. I have tried both and increased the MCH voltage from 1.1 v to 1.2 v, but so far can't get it to run in dual channel mode at all and single channel mode seems to run fine but I still get errors in memtest86+. Also tried optimized Bios settings and loosened memory timings (from 7-7-7-16 to 8-8-8-27 and tRFC 60 to 70) and reset Command Rate from 0 to 2. CPU is Core 2 Quad @ 2.4 Ghz, PSU is rated at 400 watts, Video card is Gigabyte GT220.

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General :: Bonding - Cant Ping The Gateway Or Any Other Server

Jun 14, 2011

I have configured bonding on 64 bit centos 5.4 I have to put the machine to a different VLAN for that i did the Ip change and restated the network. but i cant ping the gateway or any other server in that network. the cofig files are as follows

vi /etc/modprobe.conf
alias eth0 bnx2
alias eth1 bnx2
alias scsi_hostadapter aacraid
alias scsi_hostadapter1 ata_piix
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd
alias bond0 bonding
options bonding mode=1 miimon=100

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Ubuntu Networking :: 'wlan0 Is On Channel -1 But The AP Uses Channel 6' With Airplay-ng?

Jun 29, 2011

I'm trying to crack my wep password just for kicks, but I keep running into the same error. When I try to use airplay-ng for the packet injection, it always gives me the error " wlan0 is on channel -1, but the AP uses channel 6". I've tried setting wlan0 to channel 6 manually, but that doesn't help. I spent a while searching for a solution, but it seemed like each page had a different, usually highly complex solution, that still doesn't work. I have the most recent drivers for my wireless card, and it meets all the requirements. So, is there any solution to this that will actually work?

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Networking :: Bonded NICs At Host OS - Ubuntu Server - Bridged To Virtual OS - UServ - In VMware Server

Jul 19, 2009

Just something that struck me while working on our virtual servers today.

I have bonded 3 NICs at the host in Ubuntu Server 8.04 LTS. They are using mode 0 for Round-robin. Point is to increase the speed/performance of all the servers, but mainly the fileserver. The fileserver is a virtual server running Ubuntu Server 8.04 LTS on VMware Server 2.0.

1) I noticed the NIC in the slave OS reported link speed as 1000 and Im unable to change it as the NIC (virtual one) doesnt support it. Does this not really matter, as the NIC doesnt exist, and it will run at higher speeds anyway? Or do I have to remove the bond on the host, bridge all 3 interfaces from the host to the slave OS, and then make a bond in the slave OS?

2) While at it, does mode 0 only increase performance on data being sent from the host or does it also increase the available incoming bandwidth?

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Ubuntu :: Using The Dual-channel Or Quad-channel?

Jul 14, 2011

Thinking about building a new system, with 4GB of DDR3 RAM. I am just wondering, which would you prefer: Dual-channel DDR3 or Quad-channel DDR3? Does one have better speed performance over another? Will one way keep your system cooler?

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CentOS 5 :: Install 5.4 64-bit On A Server With Two NICs?

Dec 28, 2009

I am trying to install CentOS 5.4 64-bit on a server with two NICs, one of which allows for iSCSI boot. I want the NIC that allows for iSCSI boot to connect to the iSCSI target on my 169.254 subnet. I want the other NIC to be connected to my 192.168.1 subnet so that it can reach the Internet for the CentOS Network Install.

Anaconda only configures one NIC, leaving me with an iSCSI target and no Internet or with Internet and no iSCSI target. Is it possible to configure both NICs in Anaconda?

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Fedora Networking :: Routing: 2 HW-Routers, 2 Nics On 1 Server?

Mar 19, 2011

i have a Server, which has 2 nics installed. Each of those is connected to a router, which is connected to internet. On the server, i have apache, maillserver and im-server running. On the other hand, also squid, dansguardian and clam are running. so now: via eth0 i would like to have just the traffic, which is requested from outside (the big bad internet..) to my server (apache, mail, etc). via eth1 i would like to have all OUTGOING (also to the big bad internet) from the server, which is requested by a internal client. And of course all requests to my own server

both nics shall route their traffic to their own router. For better comprehension please consult the enclosed graph. Until now, i did not find a good solution, the default route is set to the traffic from eth0, if not, no external request will find back to a client do you have a idea how to handle this the easiest way?

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CentOS 5 Networking :: Configuring DHCP Server With Two NICs?

Mar 31, 2011

configuring DHCP server with two NICs. I need DHCP server with 2 NICs:

eth1 -
eth2 -

The client also has two NICs and suppose to receive ip addresses eth1 from and eth2 from Here is the dhcpd.conf from dhcp server:

ddns-update-style interim;
ignore client-updates;


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Ubuntu Networking :: NICs On Clean Server Installation Not Working?

Aug 18, 2010

I have a clean installation of Ubuntu Server 10.04 x64 on an HP Proliant DL380 G3. It has two Broadcom NICs in addition to its ILO. During the installation, both NICs were listed... but neither was able to pull DHCP, nor did they function with manual settings. The first NIC is currently connected and is known good. So I left it alone and figured I'd troubleshoot it later (which is now). This server is going to be a VMware Server host. I wanted to install ESXi on it, but it doesn't like the old server's cheap ICH RAID controller.


I noticed here it says they're disabled. so I thought perhaps this was a 64-bit driver issue. So, I booted my trusty Ubuntu desktop 10.04 32-bit live cd, and the NIC works fine. Now, here's where it gets weird. Seeing that, I booted it to Ubuntu server 10.04 32-bit installation from a flash drive, expecting to see the NICs working fine during the installation.

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Hardware :: CentOS 5.2 Wont Recognize Nics From Supermicro Server?

Jun 14, 2011

I just installed CentOS 5.2 on a mini Atom server and it wont recognize the nics. Not sure what kind they are, think they are Intel. (built in)It's the first time this has happened to me. Where do I start to get it to recognize the nics? Normally it works out of the box.

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Networking :: Configuring 2 Nics To Talk To Two Different Subnets On A Sles10sp3 Server?

Nov 27, 2009

I am trying to setup a HP blade (BL460) server with 2 nics on sles10sp3. I want one nic to connect to a management vlan and and second to connect to the standard network. It should be possible for a desktop in the standard network to connect to either nic by providing the correct ip address.use this server as our first virtualisation hosts server using Xen. I dont want traffic used to upload / download images to the server through nic1 to effect the users traffic on the standard network on nic2. However any attempt at routing (which Im not good at) has led to the tx traffic all going out the default route (users subnet).

Each time I setup the nics via yast2 lan I can get the standard lan nic working ok. but cannot get the management nic working correctly. The server can ping a workstation on another vlan, but the workstation cannot ping the management nic. The default route appears to be forcing all traffic on the host out through this route, which I presume is normal behaviour. Using tcpdump I can see the ping packets received by the server, the server then responds through the default gateway, which the workstation does not see.

However, this normal behaviour will result in extra traffic on the users network when image downloads are initiated from the management interface.If I use a network routed through router setup as our management vlan , and with router as our lan for general users. Where server ips are nic1 and nic2 My workstation would be If I ping the server at
I get no response. If I ping the server at no problem.

Basically I used the network setup recommended by vmware to manage a virtual server. I actually have 4 nics, I thought by just talking about 2 nics the problem would be easier to explain. vmware specify that two nics should be used for management and two for the Lan. This is what I am trying to achieve, but both subnets must operate independently.

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Ubuntu Networking :: 2 NICs, Server Won't Respond To Requests But Internet Works

Apr 16, 2010

I recently set up a new web/file server with 9.10 server x64 with 2 NICs and I am trying to configure eth0 to respond to my LAN for internal samba filesharing and eth1 to handle website/ftp requests on my static IP, but whenever eth0 is up the server is not accessible at 173.XX.165.65 for web or ftp but both work fine at When eth0 is down, public IP works fine. I have set /etc/network/interfaces like this:

# The primary network interface
auto eth0
iface eth0 inet static


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Ubuntu Networking :: Server With Both NICs Enabled Breaks Internet Connection?

Nov 25, 2010

I have installed Ubuntu 64 10.04 server. I have two nics and have set them up to both be static with their own IP with the correct gateway, network, broadcast, subnet and dns-nameserver. When I have both enabled, I can ping local pc's but I can't ping Internet sites like Google nor can I get out to the Internet with apt-get or Lynx.

If I disable one, then I am able to get out to the Internet. All my configs look good, and it does not matter which one I disable, just so long as there is only one NIC on, everything is good.

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Server :: MythTV -- Scan Gets Stuck On Channel 22?

Mar 20, 2010

I know that my tuner is working as i can watch tv in xawtv.
The hardware I'm working with:
P4 2.8GHZ
512MB Ram
Hauppauge 44981

I have added the card as both V4L and MPEG4 (I'm unsure which I'm supposed to use).

I setup the source to have "no grabber", and then set up input, when I do this, for V4L, there is no "Scan for Channels" option, when i set up input for MPEG4, there is that option, but when I click it i get an error, "Failed to open the card", but I can change the input on that page to the V4L input, i hit scan for channels, it scans and adds channels up to channel 22, where I get "No Lock"; it doesn't seem to do anything else from there.

So, how should I be using this card, and how can I know when its working with mythtv?>

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Red Hat :: Disable One Of The TWO Fibre Channel HBA Adapter On Redaht 5.3 Server?

Feb 10, 2011

A single LUN is attached to my server with rhel5.3. The server has two Fibre channel adapters. I need to turn off one of the FC interface manuly. Which command should i use to turnoff(disable) the adapter. The settinga are the following:

#multipath -ll
test-lun (36005076801900139b800000000000150) dm-14 IBM,2145
[size=10G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=100][enabled]
\_ 2:0:11:3 sdc 8:32 [active][ready]
\_ 4:0:13:3 sdi 8:128 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 2:0:12:3 sde 8:64 [active][ready]
\_ 4:0:12:3 sdg 8:96 [active][ready]

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Networking :: Can't Ping Server From Client But After Run In Server RHEL5

Nov 27, 2010

I have 2 ethernet cards but when I look at the Network configuration in "Hardware Tab" I have another acx wireless network. How to delete that because In my system Idon't have wireless card..probably installed before but want delete it now.


then windows can ping server and resolve ip address and browsing Internet but can't ping [URL]... result is Request time out. ICMP already enabled in iptables.

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Server :: Config Web Server To Be Access By Other Machines With Browser?

Jul 19, 2010

I installed a server called Oracle VM Manager, which is actually a web based application to manage Oracle VM server.After successfully installed everything, it suppose to be access by browser using But strange thing is, I can see web pages from the server itself with but any other machines to access it with hostname or ip address all failed.

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Server :: Add New Service On RHEL5.4

Aug 30, 2010

I'm developing simple transaction switch using java socket programming and running operating system RHEL5.4 . Now it is completely done and working fine. So I have written the simple shell script to run it on background.


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Server :: Creating LV More Than 8TB In RHEL5.3?

Sep 2, 2010

how can we achive more than 8TB size for one LUN.?I am getting following error..

[root@storage ~]# mke2fs -j /dev/VG01/data
mke2fs 1.39 (29-May-2006)
mke2fs: Filesystem too large. No more than 2**31-1 blocks
(8TB using a blocksize of 4k) are currently supported.

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Red Hat :: Implement CBQ In RHEL5 Server

Sep 25, 2010

I want to implement CBQ in my RHEL5 server so that i can manage my BW.

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General :: Run Windows 7 And Rhel5 Server On Same Pc Under Xen?

May 21, 2010

I have rhel5 running ok and windows7 running ok, and currently access both via grub (both os are on separate disks) I want to be able to switch between both without rebooting. xen is installed and working but I cannot configure windows to run as a guest as xen wants an iso or img file.

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