Networking :: Network Bonding Citrix Xenserver

Apr 16, 2010

As Xen is based on LINUX I'm hoping that someone out there could help me. I'm struggling with 802.3ad on a cisco switch (LACP). I'm going to be using this for my storage network on a dedicated cisco switch talking to a teamed pair of intel NIC's ISCSI storage. From the intel side I can set them to Link aggregated one team 2GB this is fine and my config shows active active on the NICs. How would I go about doing this from a LINUX box. In order to remove any bottle necks it needs to be active active from Xen. If I do a pif-forget uuid= on a XEN server I'm in complete control using Linux.

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General :: CentOS 5.3 32bit On Citrix XenServer NO Graphical Interface

Jan 2, 2010

I have installed Citrix Xen-Server on my server and managed to install Windows 2003 R2 Server successfully.I also installed CentOS 5.3. The installation went fine, however, I cannot get Gnome or KDE going. I only have the text interface.

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Fedora :: 11 - Installed Citrix Ica Client From The Citrix Website Does Not Seem To Be Working

Jul 16, 2009

I have fedora 11, and installed citrix ica client from the citrix website, but it does not seem to be working. Basically nothing happens instead of launching. I have also installed "terminal server client" (which does work except for the citrix ica connection part of it). In this program when you go to the option "Add connection", then there is an option that says "Citrix ICA connection". It used to be greyed out before I installed the citrix client from the citrix website. Now it is not greyed out but nothing happens when you click on it (also no error messages). I also tried going on the hard drive to '/usr/lib/ICAClient/wfica' and also to "/usr/lib/ICAClient/wfcmgr" and manually trying to launch those executable files but nothing happens there as well.

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Ubuntu :: Setup Citrix ICA Client 9 On 9.04 Server - Error In Network Connection Network Or Dialup Connection May Be Preventing

May 14, 2010

I am trying to Setup citrix ICA client 9 on Ubuntu 9.04 Server. I installed it very easily and I am not getting any lib error also. But when I try to connect to the citrix server, it fails with a pop up saying "Error in Network Connection Network or Dialup connection may be preventing ......" This is driving me crazy from 3 days. My project is to check the feasiblity of a Linux desktop

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OpenSUSE Network :: 11.2 802.3ad NIC Bonding?

Jun 9, 2010

I'm attempting to install a new OpenSUSE 11.2 system (64 bit) onto an Intel-based server. I'm having no success in bonding any of my network interfaces into a single interface. I'm fairly certain the problem is not the switch as I'm using the same switch (Foundry FastIron SuperX) on which I have an older SLES10-based system that runs with 4 NIC ports bonded together in this fashion (as well as a number of W2K3 systems using SLA). I set up the older SLES10 box by editing /etc/sysconfig/network/ifcfg-blah files at the command-line as bonding was not supported by YAST in that version.

Now I understood, perhaps incorrectly, that YAST in OpenSUSE 11.2 permits bonding. So I bowed to the inevitable and from the GUI ran Yast->Network Settings and worked through all the tabs. I faithfully set up all the NIC ports to be switched off for bonding use then added a new Bond0 interface to which slave NIC ports are bonded. Default gateway was set to point to my router via the new Bond0 interface. I ensure that the firewall was off and that the relevant interfaces all pointed to the Firewall Disabled zone. After setting up as required, I rebooted the system and ran a test ping to a few addresses on the network. No joy. I checked the routing table via ip route then netstat -nr and then route all on its own. The routing tables looked as expected each time.

Getting down to first principals I ran ifconfig and again everything looked fine. I checked via modprobe -l bonding just in case there was something fundamental missing. Nope. I assumed that YAST hadn't worked as advertised and jumped online to grep for more info. Firstly I see that the HOWTO is out of date (Bonded Interfaces With Optional VLAN - openSUSE). I also noted that the bonding module option mode no longer supports numbers but upon looking at my ifcfg-bond0 file it contained mode=802.3ad rather than mode=4 so that wasn't it.

On comparison with SLES10 I did notice that config files of the ifcfg-eth-id: XX-XX-XX-XX-XX type were no longer used in Open SUSE 11.2 with only ifcfg-ethX config files. I examined those and also noted that the _nm_name and UNIQUE options were also no longer used. No need for lspci (or the Hardware control panel) when setting up bonding? Example of ifcfg-bond0 file contents (edited for brevity):


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OpenSUSE Network :: 11.2 Bonding In Xen Not Working?

Dec 1, 2009

I'm running 11.2 on a Dell PowerEdge1850. In the normal kernel, bonding is working just fine on the two ethernet ports. When I reboot into the Xen Kernel, I get the following error at boot:

FATAL: Error inserting bonding ... : Unknown symbol in module...

dmesg shows several Unknown symbols. In the end, the module is never loaded.

If I reconfigure the network in Xen to not use bonding, it works fine.

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Debian Configuration :: Loosing Network Access After Bonding

Dec 17, 2010

Ive been trying to setup bonding on my debian lenny box for about a week now with still no luck.i thinks its ver 2.6.26 or summing like that.The nics are bonded and it has all the network details but for some reason I cannot ping anything on the network and I cannot ping the lenny box.

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Networking :: How To NIC Bonding

Mar 26, 2010

I am running FC10, How to NIC bonding ..

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Ubuntu Networking :: LAG Instead Of Nic Bonding?

Feb 16, 2010

I've run across a few threads in the archived forums regarding nic bonding. I could be wrong but I imagine most of the people that are looking at bonding are probably really wanting what they would get out of creating a LAG between their Ubuntu Server and a managed switch capable of LACP trunks. If you have two NICS on your ubuntu server and want 2gps throughput & failover check out the page on creating a LAG. Obviously this requires your switch to be compatible though. [URL]...

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Fedora Networking :: Bonding With Static Ip

Feb 26, 2009

I installed Fedora 10 and used dynamic IP first. Then I found out that bonding works with static ip only so I switched to static IP. But then, since I have 3 NIC cards, I configured bonding. I need help in these points:

1- steps to follow so that I switch from dynamic to static IP
2- steps to follow so that I configure bonding

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Ubuntu Networking :: How To Make Bonding

Sep 1, 2011

I have 2 Net connection and 2 NIC. I want to know how to make bonding for that. I am using Ubuntu Server Natty 11.04 - 64bit


Is it possible to make Bonding?

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Networking :: 802.3ad Bonding Not Using All Interfaces Equally

Apr 14, 2011

I am seeing an issue on a few servers where it doesn't appear all NICs in the 802.3ad lag are all operating at the same level. A few of the servers have two bonds each with two NICs in each bond.I have two NFS servers that each has 1 bond with 3 NICs.All are RHEL5 x64 2.6.18.I think the reason why I see one interface dominating RX and another dominating TX is due to the xmit_hash_policy but there are three hosts that use this particular server for network traffic.That's 3 different physical mac addresses.The layer2 algorithm should be fine in that situation I would think.Would I just be better off with balance-rr?

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Networking :: Bonding 2 Or More Adsl Connections

Nov 2, 2010

is possible to use linux (especially slackware) to bond 2 (ethernet modems) adsl connections. For example if i have 2 connection of 24mbs download and 512 upload i will create achieve 48 mgps dowload and 1 mgps upload . something like that

adsl1 modem <------ eth1--- (slackbox router) --- eth0---> my server
adsl2 modem <------ eth2----

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Networking :: NIC Bonding Works With Dhcp?

Dec 15, 2010

I want to bond two NIC to the same IP, I was able to do this for Static IP but not DHCP.
Does anyone have any idea about the possibility of this?

The process at which i reached to this question is explained here:

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CentOS 5 Networking :: Bonding Or Bridging?

Jul 19, 2011

I am confused as to what is going on with a particular box that I am working with.As you can see in the attached ifconfig print out, one eth port is basically only used as a output while the other is only really used as an input.I connect to the box via for ssh,ftp,http,etc.I just want to know the name of what is happening (is it bonding,bridging?) and maybe some information about where it is configured.I looked in modprobe.conf

eth0 Link encap:Ethernet HWaddr 00:1E:C9:EE:5A:91
inet addr: Bcast: Mask:
inet6 addr: fe80::21e:c9ff:feee:5a91/64 Scope:Link

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Ubuntu Networking :: NIC Bonding - Teaming And Switches ?

Jun 20, 2011

I have a question about bonded NICs and the switches they are connected to.

I have a server which needs to send a lot of data to another server quickly. Both have multiple GbE NICs. I understand what is required at the server end (I think) in that a pseudo-interface is created such as bond0 with the IP applied to that interface rather than eth0 and eth1.

My question relates to the connection between the servers, i.e. the switch. Is a specific type of switch required for this to work, as an IP will have 2 (or more) MAC addresses associated with it, or how does the switch decide to which port to route the traffic for the bond0 IP?

Also, will this only work when multiple connections are being made? What I mean is, will each individual TCP connection only use either the physical eth0 OR the physical eth1 interface, or can a single connection make use of the aggregated bandwidth, sending one packet to one physical interface and another to the other physical interface, using the bond0 IP as the destination?

What I am trying to work out is if I had a storage server connected to an application server and exporting storage using NFS or GlusterFS, would an aggregated link improve throughput?

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Networking :: Bonding / Binding Multiple Interface Into 1

May 27, 2010

I have 4 DSL modems connected with 4 different ISP's my scenario is

a) My FC-2 machine with LAN IP= and Bond0 IP=
b) Modem-A LAN IP= , ext
c) Modem-B LAN IP=, ext
d) Modem-C LAN IP=, ext
e) Modem-D LAN IP=, ext

Modem-A, B, C, and D LAN connected with my FC-2 machine, and all 4 interfaces of my machine are in Bond0, Now please help me what default Gateway I should set in my FC-2 machine?>??? or I have to set 4 gateways in my machine?and will this configuration works?

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Networking :: Bonding Mode 1 Fails - Can't Ping The LAN

Oct 8, 2010

I'm trying to set-up a back-up (mode 1) bonding nic. I can't ping the LAN, pinging bond0 locally however works. Here is my config:

alias eth0 e1000e
alias eth1 e1000e
alias eth2 e1000e
alias eth3 e1000e
alias scsi_hostadapter ahci
alias scsi_hostadapter1 usb-storage
alias bond0 bonding

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Fedora Networking :: Bonding Configuration Ethernet Fail Over

Oct 19, 2009

I instaled HPML350 G6 server. I would like to configure ethernet fail over. I got the script from my friend and configured and restarted the network services. I am getting the error message that ""Deprecated configure file /etc/modprobe.conf, all config files belonging to /etc/modprobe.d". System automatically assigning IP address also.

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Ubuntu Networking :: 10.4 - NIC Bonding - Make Routes Behave Themselves?

Dec 3, 2010

I just set up NIC bonding in Ubuntu 10.4, following these instructions, and I've got it working except for one problem: Every time I up or down a network device, or every time the system reboots, my routes go all to hell with eth0 and eth1 entries next to my bond0 entries. When the eth0 and eth1 entries show up, my connection is hosed and I have to go in via the maintenance IP to kill each route one at a time, leaving only bond0. Here's how I want my routes to look at all times:

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface U 0 0 0 bond0 UG 100 0 0 bond0
Here's my /etc/network/interfaces:


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Networking :: Bonding Of For Fault-tolerance (active-backup)?

May 14, 2010

Just for the learning sake, I was going through this document for Bonding of Two Ethernet Cards for Fault-Tolerance (active-backup). Here, /etc/modprobe.conf is as


alias bond0 bonding
options bond0 mode=1 arp_ip_target= arp_interval=200 primary=eth0

Now, I just wanted to to know,

- What parameter is arp_ip_target and why it is used.

- Why the IP is, whereas the IP in /etc/sysconfig/network-script/ifcfg-bond0 is

- Can I use the below /etc/modprobe.conf ?


alias bond0 bonding
options bond0 miimon=100 mode=1 primary=eth0

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Networking :: Underwhelming The Routing/VLAN/bonding Performance?

Mar 10, 2011

Upgraded a school network from FastEthernet to GigabitEthernet. Broke the network up into VLANs. Discovered that the router (Cisco 2821) could only route between the VLANs at around 400Mb/s. Tested out some layer three switches. They work very nicely, but are more than we need. So I started putting some spare equipment we had together as a Linux router.

Result: Underwhelmed. The machine has two Intel GigE interfaces. With the machine configured to route between two test VLANs I get about 855Mb/s with a single interface (all VLANs trunked over the single interface). That's about what I'd expect. Maybe a little low. With the two interfaces bonded, I get about the same.

For testing, I set up eight Windows machines, four on each VLAN. The Linux router is the only machine that can route between the two VLANs. I used Iperf to generate traffic and measure throughput between pairs of machines. Two machines on the same VLAN get about 300Mb/s between themselves. With the four machines organized into cross-VLAN pairs, I get about 855Mb/s total throughput on a single interface and very slightly more with two interfaces bonded.

The Linux router has an Intel Xeon E5506 CPU running at 2.13GHz and these are Intel GigE interfaces (built-in). I would expect to get a large boost by adding the second interface. I've confirmed that bonding is working (by pulling either of the cables and watching everything continue to function).

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Networking :: Vlan Tagging With Bonding Not Reaching Gateway

Jan 28, 2011

I am running RHEL 5.3 on a blade server w/ 2 NICs that are bonded. I have 2 VLANs that I am trying to configure. I have created the network-scripts ifcfg-bond0.<vlan#>. I can ping the device but the gateway won't ping. I am in console mode so cutting and pasting output doesn't work.

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Networking :: Bonding Bond Running 802.3ad Dynamic Link Aggregation

Aug 20, 2010

Is it possible to bond an existing bond. I have 4 nics assigned to 2 bonds for link aggregation. ie

e1000g0 - bond1 - mode =4
e1000g1 - bond1 - mode =4
e1000g2 - bond2 - mode =4
e1000g3 - bond2 - mode =4

I would have presumed that you have 2 x agregates giving 2 x 2gig links and the resilience is that if one nic fails in either bond you carry on with that bond running a 1 gig link until fixed. But, our architect wants to have an active/passive (mode 1) accross bond2 and bond3. I have setup tons of mode 1 bonds and mode 4 bonds but never tried bonding 2 x mode 4 bonds!

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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 :: Ethernet Bonding - Link Layer Detection Failover Not Enough

Jul 7, 2011

We run redundant switches that two nic's on each server connect to. We also run bonding on our servers. Because we have two switches, we can't run lacp or anything. If a switch goes into a crashed state where it doesn't pass traffic but still provides link, bonding thinks the interface is still up and thus will still send traffic through it. Does anybody know a better way to configure the fail over of the interface? This would be a similar situation to somebody using a media converter.

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Networking :: Port Bonding Won't Use Active-backup Using Round-robin?

Dec 9, 2010

I'm trying to configure my Red Hat server to use port bonding for two interfaces going to a switch, and I followed this redhat guide [URL]...-redhat-server but when I attempt to bring the bond up, it simply uses mode 0 (round robin) instead of mode 1, which I specifically configured in /etc/modprobe.conf by doing

options bond0 mode=1

Any ideas why the bond would continue to use round robin when I set it to active-backup?

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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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CentOS 5 Networking :: Bonding Mode=1 Doesn't Work Properly

Dec 10, 2010

We have a Blade server connected to a two internal ESM Cisco switch. We want to have a active-backup configuration with bonding. We follow the documentation and we hace configured the next:

Centos 5.5
[root etc]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Broadcom Corporation NetXtreme II BCM5709S Gigabit Ethernet


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Networking :: Ethernet Bonding Require The Switch To Support Link Aggregation?

Feb 19, 2010

if could setup ethernet bonding in linux, does it require the switch to support link aggregation?

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