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Questions tagged [bonding]

"bonding" is the Linux-term for link aggregation.

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18 votes
6 answers
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Why does my gigabit bond not deliver at least 150 MB/s throughput?

I directly connected two PowerEdge 6950 crossover (using straight lines) on two different PCIe-adapters. I get a gigabit link on each of these lines (1000 MBit, full duplex, flow contol in both ...
Nils's user avatar
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15 votes
4 answers
20k views

How to identify NICs that are connected to the same switch from a Linux box?

Initial Setup As a Linux administrator you have installed a fresh Linux box with 6 NICs eth0 to eth5. The eth0 interface is correctly configured and all other interfaces are currently up but without ...
Reiner Rottmann's user avatar
14 votes
4 answers
37k views

Link bonding across multiple switches?

I've read up a little bit on bonding nics with ifenslave; what I'm having trouble understanding is whether there is special configuration needed in order to split the bonds across two switches. For ...
Bryan Agee's user avatar
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14 votes
2 answers
17k views

How to Bond Two (Multiple) Internet Connections for Increased Speed and Failover

We are located in a rural area with two slow ADSL connections (3.5/0.5 Mbps) and wanted to improve connection speed and reliability by somehow "combining" them. The following describes our solution ...
legolas108's user avatar
12 votes
3 answers
53k views

Link aggregation (LACP/802.3ad) max throughput

I'm seeing some confusing behaviour regarding bonded interfaces under Linux and I'd like to throw the situation out there in hopes that someone can clear it up for me. I have two servers: Server 1 (...
Zetten's user avatar
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12 votes
3 answers
48k views

What are the differences between channel bonding modes in Linux?

Under Linux you can combine multiple network interfaces into a "bonded" network interface to provide failover. But there are several modes, some of which do not require switch support. I'm not ...
hookenz's user avatar
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11 votes
3 answers
16k views

RHEL 6.4: Mode 1 channel bonding not failing over

I'm running RHEL 6.4, kernel-2.6.32-358.el6.i686, on an HP ML 350 G5 with two onboard Broadcom NetXtreme II BCM5708 1000Base-T NICs. My goal is to channel bond the two interfaces into a mode=1 ...
Wesley's user avatar
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11 votes
2 answers
9k views

Does setting MTU on logical interfaces affect physical interfaces

I've been using a combination of interface bond-, vlan- and bridge-interfaces to provide redundancy and different logical network layers to xen domU's. This setup is working well however i'm a bit ...
KvH's user avatar
  • 133
11 votes
1 answer
6k views

FreeBSD link aggregation no faster than single link

We put a 4 port Intel I340-T4 NIC in a FreeBSD 9.3 server1 and configured it for link aggregation in LACP mode in an attempt to decrease the time it takes to mirror 8 to 16 TiB of data from a master ...
Warren Young's user avatar
10 votes
16 answers
10k views

2 DSL lines...any benefit?

I have Verizon DSL in my office, I put DSL in about a year ago for $29.95 month...I added a new phone line recently and it was cheaper to actually get it bundled with DSL so now I have two DSL lines......
EJB's user avatar
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10 votes
4 answers
39k views

How do people monitor the status of bonding slave interfaces on linux?

I have set up two interfaces as bonding slaves (eth0 and eth1 bonded as bond0). How are people monitoring the status of the slaves? How are you notified if the link fails on one interface? Do you ...
Louis Munro's user avatar
9 votes
4 answers
79k views

Can bonding 2 interfaces double the speed?

I have 2 linux boxes running centos 6.5 each with 2 interfaces bonded together, linked to a Cisco 2960-S switch with lacp configured ports. The configuration on the switch port-channel load-balance ...
Ammar Lakis's user avatar
9 votes
3 answers
14k views

Server-to-Switch Trunking in Procurve switch, what does this mean?

I am looking to set up switch redundancy in a new datacenter environment. IEEE 802.3ad seems to be the go-to concept on this, at least when paired with a technology that gets around the "single ...
MattUebel's user avatar
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9 votes
4 answers
4k views

Multi-WAN bonding across different media

I've recently been thinking again about a product that Viprinet provide, basically they've got a pair of routers, one that lives in a datacentre, Their VPN Multichannel Hub and the on-site hardware, ...
Tom O'Connor's user avatar
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9 votes
3 answers
24k views

Does linux balance-rr (bond mode=0) work with all switches?

I'm configuring two ethernet interfaces into an aggregation group to double bandwidth, and I was wondering if bond mode=0 works for all switches? What about dumb switches that don't support LACP? Will ...
ensnare's user avatar
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9 votes
3 answers
20k views

Why iperf still reports 1Gbps performance when using bonding over two 1Gbps adapters?

As I understand it, bonding brings among other benefits the ability to increase the network speed between two machines in a LAN. Bonding [...] means combining several network interfaces (NICs) to a ...
Arseni Mourzenko's user avatar
9 votes
2 answers
31k views

How does one diagnose Linux LACP issues at the kernel level?

Is there an underlying administrative or diagnostic interface to the Linux bonding driver to determine what is going on internally? I've used link aggregation between Linux boxes and Cisco switches ...
jjoganic's user avatar
8 votes
2 answers
775 views

Network traffic doesn't appear to leave the trunk

I'm in the process of staging up some new virtualization servers, and part of that is to get some higher-bandwidth pipes into them. The ultimate goal is to bind 4 GigE ports into a single trunk ...
sysadmin1138's user avatar
  • 134k
8 votes
1 answer
9k views

Is bonding mode=5 a solution against MAC flapping?

There is two are interconnected Cisco WS-2950T. By the one GBIC port on first switch connected a first NIC of bonding interface, and by the one GBIC port on second switch connected a second NIC of ...
jurijcz's user avatar
  • 207
7 votes
2 answers
1k views

Baffled with a simple bond throughput, can't get more than a Gig

I have DL380 server with QLogic Gigabit Ethernet installed. Simply trying to create a bond but can't seem to get throughout more than 1 Gig link. All 3 cables from 2 servers are connected to S40 ...
NBhatti's user avatar
  • 173
7 votes
3 answers
12k views

Bonding 2 or more Gigabyte NIC together to get 2Gbps performance between 1 server and 1 client?

I have not gotten the server or the NIC yet, but here is the target setup: 1x Server 1x Client 1 or more NIC linked point to point between the Server & Client (No switch involved) So I am ...
Pharaun's user avatar
  • 350
7 votes
3 answers
3k views

Linux NIC bonding on top of vlan interfaces?

Is it possible to set up bonding(active/backup) on top of existing vlan interfaces ? Assume the following scenario: Linux Server with 2 NICs connected to separate switches iSCSI initiator + MPIO to ...
powo's user avatar
  • 356
6 votes
4 answers
3k views

Does bonding 3 1G NICs into one make a 3G NIC?

For example, I have 3 NICs (1GB) and make a bonded NIC. Do I get a 3GB NIC? Should I connect these 3 NICs into 1 switch? If one NIC dies, do I still have the network between server and switch alive? ...
Sato's user avatar
  • 459
6 votes
4 answers
17k views

How to achieve 2-gigabit total throughput on Linux using the bonding driver?

For this application I am less concerned with high availability than I am with total throughput. I have one IP address on the server end, and I want to be able to send more than 1-gigabit of traffic ...
user avatar
6 votes
4 answers
46k views

Linux bonding: 802.3ad (LACP) vs. balance-alb mode

Here's the situation. I would like to connect my Linux servers to a single network using dual link for fault tolerance and load balancing reasons. The servers have 2 or more 1-gig NICs and I plan to ...
sagi's user avatar
  • 707
6 votes
3 answers
3k views

Multiplexed 1 Gbps Ethernet?

Is it possible to multiplex two (or more) 1Gbps Ethernet into a single logical connection? Is it common place? Advisable? Stupid? Other considerations? I ask because my hosting partner's network ...
Stu Thompson's user avatar
  • 3,379
6 votes
1 answer
1k views

4X10GB Bonded NIC - only producing 4-5GB throughput

I have Two HPBL685c G6 blade servers running Ubuntu 15.04 Each server has 4X10GB NIC 2x10GB NIC are connected to a single VirtualConnect 10/10G Ethernet module The other 2x10GB NIC are connected to a ...
Nicholas Curtis's user avatar
6 votes
3 answers
2k views

Can we bond (with Manage Virtual Interfaces, or similar) across an USB Ethernet dongle and the Airport Wifi

We've got a Macbook Air (Actually, we've got some Airs, Some Pros and some iMacs). We've got a consistently annoying problem, which is that when they connect to our DHCP server, they've actually got ...
Tom O'Connor's user avatar
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6 votes
2 answers
15k views

LACP with 2 NICs working when either one is down, not when both are up

I'm running into problems with getting a LACP trunk to operate properly on Ubuntu 12.04.2 LTS. My setup is a single host connected with two 10 Gbe interfaces to two seperate Nexus 5548 switches, with ...
Tolli's user avatar
  • 61
6 votes
2 answers
5k views

Fault Tolerance with 2 HP ProCurve 2824 Switches

Looking for some advice on our current situation. We have a full rack at a data center that contains 1 uplink to the data center distribution layer switch (we don't control this), 2 HP ProCurve 2824's ...
aj4525's user avatar
  • 61
5 votes
1 answer
18k views

Does balance-alb and balance-tlb support fault-tolerance?

I've read bonding.txt file of kernel documentation, it's clear about load balance, but are balance-alb and balance-tlb really fault tolerant?
sebelk's user avatar
  • 702
5 votes
3 answers
10k views

Network bonding mode 802.3ad on Ubuntu 12.04 and a Cisco Switch

I am trying to team 3 network cards together on 2 servers. I am trying to achieve a maximum throughput of 3Gbps to replicate data between the servers. The setup is simple, I have 2 servers with 3 ...
drivard's user avatar
  • 407
5 votes
2 answers
646 views

only one of two SFP ports reachable on iSCSI SAN

I have a server with HP NC523 dual 10GbE network card and HP MSA1040 storage with dual 10GbE iSCSI-controller. Both ports on NC523 are configured as a bond. The ports on MSA have different IP-...
Kris_R's user avatar
  • 305
5 votes
3 answers
16k views

Linux bond mode 4 (802.3ad) - 2 switch - 4 NIC

I know that you can use bonding mode 4 with 1 servers with 2 nic using 2 switch. Bond 0 made of : Nic 1 port 1 -> switch A Nic 2 port 1 -> switch B In this case I can loose a switch or a nic or a ...
rnooooo's user avatar
  • 51
5 votes
3 answers
518 views

Bonding with 2 NIC's and 2 reserves?

I have a server with 4 ports (2 adapters with two ports each). I want to connect two ports to the local switch and two other ports to the external switch. This local switch has an uplink to the ...
user28362's user avatar
  • 586
5 votes
1 answer
5k views

Bridge on vlan on teaming for KVM

I have problem to create bridge on vlan on teaming. Why I do something like that? - Kvm needs bridge - Vlans because I need vm’s in different subnets - Teaming in option active-backup (small HA) I do ...
user's user avatar
  • 51
5 votes
2 answers
4k views

How to Set Linux Bonding Interface to Gigabit

I have enabled Linux active backup mode bonding. Each interface is a gigabit interface, but the bond interface seems to end up at 100 Megabit: bonding: bond0: Warning: failed to get speed and duplex ...
Kyle Brandt's user avatar
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5 votes
1 answer
2k views

Booting a diskless Debian system using bonding, bridging, and iSCSI

I'm trying to build my personal holy grail: booting my Debian Wheezy KVM server diskless from a iSCSI target and the only configuration needed on the diskless server is the iSCSI parameters in the NIC ...
hvtilborg's user avatar
  • 217
5 votes
2 answers
11k views

How do I put a bridge on top of a bonded interface?

I'm setting up a Ubuntu Server 11.10 box with multiple Ethernet interfaces that are bonded for redundancy. I'm planning to use it as a KVM host, so I'll need a network bridge. To accomplish this, I ...
Taymon's user avatar
  • 151
5 votes
2 answers
3k views

bonding driver broken on centos6?

I have a server with minimal installation of CentOS6 64bit (minimal option from the installer). The bonding driver does not seem to work correctly. The output from /proc/net/bonding/bond0 is: Bonding ...
Lukasz's user avatar
  • 482
5 votes
1 answer
5k views

Machine with bonded interface does not receive multicast packets on all slave interfaces

After an upgrade of our machines from RHEL 6.6 to RHEL 6.7 we observed a problem where 4 of our 30 machines only receive multicast traffic on one of their two slave interfaces. It is unclear if the ...
K Erlandsson's user avatar
5 votes
2 answers
791 views

FreeBSD 10.0-RELEASE: No lagg0 after reboot

I have a server running Freebsd 10.0-RELEASE. I'm trying to create bridge interface with three participant interfaces, ix0, ix1 and lagg0. Lagg0 is virtual interface made from ix2 and ix3. My problem ...
user2443856's user avatar
5 votes
2 answers
2k views

lacp, cicso 3550, 3560, help with configuration

Hey all this is a repost from a question I asked on the cisco forums but never got a useful reply. Hey I'm trying to convert the FreeBSD servers at work to dual-gig lagg links from regular gigabit ...
Flamewires's user avatar
4 votes
5 answers
10k views

NIC bonding with two uplinks

Is bonding the preferred way of implementing ISP redundancy? In the texts I've seen, bond device has a netmask, gateway of it's own. How can this be obtained if there are two different gateways from ...
Karolis T.'s user avatar
  • 2,769
4 votes
2 answers
3k views

Bonding dual 1 Gbit/s NICs to boost throughput to single 2.5Gbit/s port

Linux is capable of bonding NICs together. The interesting policy for this is Round-robin, which alternates outgoing packets between each NIC. However the performance benefits are usually limited to ...
1N4001's user avatar
  • 169
4 votes
2 answers
827 views

Do you trust LACP?

Are there any reasons why I should not rely on LACP when designing network topology? I exactly mean L2 switch to hypervisor connection, so it is the place where agregated traffic of VMs cumulates. We ...
Andy Coarse's user avatar
4 votes
2 answers
17k views

NIC Active/Passive bonding with priority

I will configure a bond of three NIC's. I want to define which one will be first used and which NIC will be used as the second and third NIC when failover is done. Is this possible? Thanks
user28362's user avatar
  • 586
4 votes
2 answers
2k views

What Linux Bonding Mode Is Appropriate For ATA Over Ethernet?

I'm using AoE (ATA Over Ethernet) on a Linux NAS with bonded gigabit nics. I'm curious as to which bonding mode is most appropriate for use with AoE? (balance-rr, balance-xor, 802.3, etc) I'm using ...
Tim Post's user avatar
  • 1,525
4 votes
7 answers
24k views

vSphere NIC Teaming - Any reason for Active/Standby?

We're using ESXi and I'm wondering about the "NIC Teaming" options for our vSwitches. On a particular vSwitch with 2 NICs, is there any GOOD reason for configuring a NIC as Active and the other as ...
user avatar
4 votes
1 answer
3k views

ESX(i) Interface Bonding ala Linux?

I'm planning to virtualize some Linux hosts that I've got, and I'm going to be putting ESXi on the physical machines. Currently, I've got two switches set up for redundancy, and I've got bonding setup ...
Matt Simmons's user avatar
  • 20.5k

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