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Questions tagged [lacp]

LACP, or Link Aggregation Control Protocol, is a standard defined by IEEE 802.3ad for bundling or bonding multiple physical network ports together into one virtual device. This provides both high availability and load balancing. Participants in an LACP aggregation actively communicate with each other using LACPDUs every 1 second or 30 second to maintain knowledge of the bond configuration.

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Linux optical 10Gbe networking, how to diagnose performance problems?

I have a small cluster consisting of 3 servers. Each has two 10Gbe SFP+ optical network cards. There are two separate 10Gbe switches. On all servers one NIC is connected to switch 1, second NIC is ...
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80 views

Load balancing multiple NICs on single machine presenting a virtual IP

I've inherited a network setup, where the NFS/Samba linux RAID server ("Ubuntu 14.04.5 LTS") is serving everything over one NIC. As a result, the 1Gb network bandwidth is saturated. Unfortunately, ...
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43 views

Link aggregation on ESXi

I have a question. I have a VM fileserver, Windows 2012R2, installed on an ESXi 6.0U3 (free version) and would like to increase the network width by adding one more NIC - link aggreagation. Previously ...
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1answer
129 views

VM transfer speed between XCP-ng (XEN) servers

I have two HP DL380 G8 servers with 4x 1TB on HP p420 RAID controllers in RAID 1+0 setup. Eth0s are connected to the router, and Eth3&Eth4s are bonded (LACP) and connected directly between ...
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40 views

Configuring subnet between machines with bonded network cards

Two machines have bond0 configured to access the Internet. Technicians in datacenter say the VLAN is created, I just need to configure interfaces on servers to work with it correctly (create a subnet)....
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67 views

Correct way of setting up network teaming for maximum throughput in Windows Server

We have a backup server with 4x1GB NICs. All 4 NICs are configures as a single Team (Switch Independent, Dynamic). NIC 1-2 are connected to SW01, NIC 3-4 are connected to SW02 and the switches are ...
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144 views

ifenslave stuck (lacp bond)

I'm trying to set up LACP bonding on Ubuntu 16.04.1 but I'm presented with this slightly illogical issue: $ ifenslave bond0 eth0 eth1 eth0: is already enslaved to bond0 eth1: is already enslaved to ...
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372 views

In a LACP bond, do all partner interfaces need to have the same “oper key”?

We use LACP (mode 4) bonds extensively in our environment, and I occasionally run into problems with new deployments where cables get crossed, or switch ports are misconfigured causing bad LACP port ...
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1answer
1k views

bond slave interfaces not getting the same aggregator id on LACP

I have a bug on some servers where LACP (802.3ad) is not working. I have on all servers a bonding device bond0 with two eth slaves and each interface is plugged on a different swich, and both switches ...
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1answer
161 views

QEMU and point-to-point link between VMs without bridge

The most common practice to connect VMs together is to use tap interfaces with the bridge between them. On a linux, bridge driver filters some classes of link-local multicast traffic, such as LACP ...
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302 views

Using LACP failure detection

I would like to have clarification on bonding using 802.3ad (LACP) In that case does the link failure is only detected after 90 sec (30 *3) in case of long LACP_rate and 3 sec in case of short. This ...
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3k views

LACP 802.3ad load balancing (bonding) on Ubuntu 18.04 not balancing evenly

I upgraded to Ubuntu 18.04 and the new Netplan configuration, but my (2) network cards stopped sharing the load evenly. In my network configuration, I have many connections to many different servers; ...
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Combine two ports into one

I have a Cable Modem which an approx. 1200 Mbit download speed connection to the internet. Unfortunately the modem splits the download into across ethernet ports - i.e. 600 MBit each. The Cable Model ...
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1answer
170 views

Bonding 802.3ad and HPE switches: ingress and egress traffic not in the same interface

I have LACP configured between my server (802.3ad, layer2, so based on source MAC and destination MAC) and my switch. Recently I saw that ingress traffic for a network peer is using one interface (...
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143 views

Could it be that no link detected until bond configured?

Could it be that the: ethtool ethx | grep detected shows "no link detected" if the bond0 isn't configured yet on OS (linux) side? isn't ethtool showing a physical state?
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606 views

Bonding 4 Gigabit ethernet and 2 Fiber SFP+

We received a DL380 with 4 Gigabit Ethernet (normal CAT6), and 2 Fiber SFP+ (HPE 10Gb SR SPF+). I've successfully managed to bond the 4 Gigabit Ethernet together, and put in place some LACP on our ...
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Linux bond mode 802.3ad not activated

on a server running Debian Stretch I configured a bond0 with the 802.3ad mode as following: auto bond0 iface bond0 inet manual slaves eth0 eth2 bond_miimon 100 bond_mode 802....
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Traffic Control on a Linux-bonded / LACP interface

I have created a virtual interface (VIF) [Read Linux Bonding / LACP interfaces] using two physical ethernet interfaces of 1GBps each. When I apply traffic control on the same, I see that the egress ...
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2answers
416 views

Bonded Gigabit Interfaces capped at ~500mbps each

This issue has been driving me nutty for days now! I recently bonded the eth0/eth1 interfaces on a few linux servers into bond1 with the following configs(same on all systems): DEVICE=bond0 ONBOOT=...
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1answer
81 views

Cisco SG550X LACP standby member even if link is UP

I configured a LAG into a stack composed by 2 x SG550X-48 (Units 1/2) and 2 x SG550X-24 (Units 3/4). The LAG1 is configured with LACP on GE3/4 and GE4/4 ports. The problem is that the GE4/4 port is ...
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650 views

Hyper-V 2016 Teaming: 1 Gbps instead of 2 with Dynamic LACP?

I want to create a Teaming over both physical NICs to double the power of the virtual LAN (vLAN) on my Microsoft Hyper-V Core 2016 Testserver. In the "Server Manager" dialog I can create multiple ...
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33 views

Server connectivity to 2 different upstream switches

I have the below questions with regard to server connectvity to two different upstream switch. Q1: In one of the blogs i read that many server NIC drivers support LACP as well for providing a port ...
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485 views

Debian LACP bond not working well?

I am configured ifenslave LACP on my Debian 8.5. Two ports connected to a Cisco SLM2024 switch. If I disconnect 1 link, everything is ok, the another link working. But when I reconnect the 1st link, ...
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2k views

NIC Team not achieving full Throughput

I'm trying to achieve 4Gbps throughput between my computer and my Synology Nas. Unfortunately I am only getting 1Gbps speeds between these systems. My setup is below: Synology DS1515+ with 4 NICS ...
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983 views

Win2012R2 NIC Teaming with LACP, but one nic has not traffic

I want have 2Gbps bandwidth (peer to peer) with 2 1Gbps NIC. It's on HP MicroServer Gen8, 2 on board NICs. I have bind 2 NIC teaming with LACP, dynamic load balance, but one interface has large ...
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4k views

Linking two Dell switch stacks with LAG / LACP

Right now we have two independent switch stacks jointed with a single ethernet cable. For throughput and redundancy I would like to join them with a LAG. One switch stack is made up of Dell 7048's, ...
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2answers
9k 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 ...
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1answer
1k views

Linux Spanning Tree between Bond and an interface

I try to do something with network virtualisation to get my Proxmox server ready for production in an HA environment i'm using openvswitch 2.5 the Setup that i try to reach: My Server which has 4 ...
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1answer
109 views

OEL 7.2 with LACP systemd shutdowns networking before umounting _netdev filesystems

I've built an NFS cluster with OCFS2 as a backing filesystem. This is working quite well with the exception of when a node is restarted/shutdown cleanly it causes a fence operation as network is ...
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1answer
2k views

systemd doesn't unmount NFS shares before stopping network

Context : RHEL 7.2 up to day as for October 2016 Physical system NetworkManager disabled Network configured through the teaming of 2x10G NICs (eth0 & eth1) as lacp0 (irrelevant) IP addresses are ...
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1answer
2k views

LACP NFS performance confusion

Background Info: So I have an Ubuntu 14.04 server (1 gigabit nic) and a NAS (Synology DS1815+, 4 gigabit nics). I am maxing out the gigabit line between by Ubuntu 14.04 server and my network ...
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259 views

LACP bandwidth of multiple connections from single fast link

Is there a way to get multiple TCP connections from the same IP/MAC to use all of the physical links in a LACP configuration? Here's my setup: The central switch (Meraki MS42P) has a 10GbE link to ...
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2answers
197 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 ...
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3k views

Debian LACP Bond eth0 Churning state

I have setup a LACP Bond on 2 x 1Gbps connections on a HP server running Debian 8.x, previously done this configuration on CentOS 7.x with no issues at all. The issue I am facing is eth0 a minute ...
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777 views

What is the purpose of a “static LACP” trunk group on HP switches?

I'm in the process of educating myself regarding configuring aggregated links on HP ProCurve switches. Looking at non-vendor-specific documentation regarding link aggregation, the defining ...
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1answer
1k views

LACP and STP configuration

I am trying to understand LACP in the context of STP. Case 1. There is a server connecting to 2 different switches for redundancy purpose and a bond interface created with 2 slaves physically ...
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1answer
785 views

Do I need to configure LAG on both ends? ESXi 6 and managed switch

This might sound like a silly question, but do I need to configure LAG settings on both ends? Currently running a single host with ESXi 6 (no vCenter), with three 1Gbps NICs in the vSwitch. The NIC ...
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1answer
477 views

LACP - Load Balancing Network 2Gbit Ubuntu

I have configured my server as bonding interface to achieve 2Gbit network speed but it seems ubuntu can not go over than 1gbit and the outgoing traffic from server is not balanced over 2 interfaces. ...
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1answer
639 views

High availability links on VMware ESXi

I have a cluster of 3 VMware ESXi6.0 hosts which are not licensed for VMware Distributed Switch. Currently, these hosts are configured with a static LAG between 2 ports on the server and a port each ...
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1answer
77 views

LACP and Loadbalancing?

I'm currently in a discussion about how LACP and load balancing is working. Assume, there are two servers, both using 4 nics (1Gbit) and they are connected to the same switch with aggregated Links. ...
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0answers
496 views

Lacp over two linux boxes - something like MC-LAG

I have two linux box'es which are gateways for some kind of virtualized network (Openvswitch, GRE). I am trying to optimize performance - so I decided, that I have to try remove routing part from them ...
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2k views

OpenVSwitch LACP bonding test setup problems

I want to test LACP bonding on ovs. I have 3 Ubuntu computer. Using 2 of them as a openvswitch and one of them as a host. The first ubuntu (call it switch1) has three NIC (2 of them usb/eth ...
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1answer
342 views

What happens to active TCP sessions when the active slave fails in a Linux bond (failove or LACP)?

Given an active-backup (mode 3) or 802.3ad (mode 4) type bond, when the active slave fails, is there any seamless failover for those TCP/IP connections that were active prior to and at the time of the ...
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1answer
2k views

iSCSI design options for 10GbE VMware distributed switches? MPIO vs. LACP

I'm working on expanding the storage backend for several VMware vSphere 5.5 and 6.0 clusters at my datacenter. I've primarily used NFS datastores throughout my VMware experience (Solaris ZFS, Isilon, ...
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76 views

NFSD lock up on FreeNAS 9.3

I have a Dell PowerEdge 2960 running FreeNAS 9.3, and a Dell PowerEdge 1955 Modular Chassis with a 5316M switch. I wanted to get a faster link between the two so I configured a LAGG with LACP over ...
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1k views

Link Aggregation with 3 switches

I am new in networking. Sorry for my ignorance. I have three switches. Switch 1 has 4 ports. Two of them connected to switch 2. And the other two ports are connected to switch 3. All these four ...
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1answer
262 views

How to implement lacp cross switches

I have a question of lacp on Cisco 2960x. Are they in the same group "1" or not? isolated? Lab setting: Server-4pt (linux) -> sw1 channel-group "1" Gi0/1-2 Server-4pt (linux)...
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178 views

LACP, sever 2012R2, qnap NAS & FAULT negotation

I've setting up a Windows Server 2012 R2 with hyperV services. The VM's hard drives are in Qnap NAS model TS-453S PRO. Between the server and the NAS, there is a D-link switch model DGS-1210-10. I'...
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1answer
2k views

LACP - Up Sngl-port-Bndl Mstr Not-in-Bndl

I setup a port channel between two Cisco switches, a 6509 running ios 12.2(17r)S4 and a 5596 running nx-os 5.2(1)N1(4). Several issues arose including bad patches and broken cables, but I currently ...
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348 views

Openvswitch 802.3ad not working properly.

I have set up the catalyst and tested with standard bonding to work normally. bond+bridge had no issues. I then recreated using openvswitch and set bond0 to balance-tcp the 2ndary port is now ...