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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 bonding add new port

I got active bond with two ports on server, under Ubuntu 22.04 Bond mode is: 802.3ad I want to add one more port. So, the question, there will be some downtime, bond flapping when I add one more port ...
zeronight's user avatar
0 votes
1 answer
867 views

LACP between Ubuntu 22.04 and Open vSwitch: Ubuntu neither responding nor sending LACP PDU

I have a a fresh Ubuntu 22.04 running in KVM with 6 virtio interface emulating e1000. This is connected to an Open vSwitch and LACP is configured on both switch and Ubuntu. Summery of my problem is ...
Xuo Guoto's user avatar
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1 answer
119 views

How to make sure my link on a host is not a part of a LACP (LAG)

How to make sure my link on a host is not a part of a LACP (LAG)? I'm trying to start booting from PXE but DHCP-requests don't reach DHCP-server most of time. I only can boot intermittently from one ...
Макс Кринж's user avatar
1 vote
1 answer
4k views

How to troubleshoot LACP flapping interface triggered by layer 3 IP Address. (Juniper)

I am currently working on solving a network issue that has led to network outages across my organization. (I have included a picture of our simple topology below). Our network consists of a Router/...
nickcrv06's user avatar
0 votes
1 answer
43 views

Diagnosing switch support for LACP and Link Agreggation

How can I tell if an airgapped switch supports LACP and link aggregation?
Papu's user avatar
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1 vote
0 answers
28 views

Issues configuring the access ports (ubiquiti)

We currently have issues configuring the access ports for our servers on our rack switches(USW-EnterpriseXG-24). Since we've learned that ubiquiti does currently not support switch stacking (vswitch) -...
wolki's user avatar
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1 answer
359 views

Juniper LACP with linux server not increase speed

And: I'm using R630 with Debian 11 and Ex2200 with version 12.3R12.4 The network: each server using 4 link to sw server 1 ==== switch ==== server 2 Here is server config ( both server ) auto lo ...
Alceatraz's user avatar
  • 133
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1 answer
327 views

Maximum throughput between Kubernetes pods with LACP bonding

We currently have a kubernetes cluster (using calico) where all worker nodes are connected together with lacp bonds (2x10GB links with LACP Mode 4 - 802.3ad). However, the maximum throughput we manage ...
E. Jaep's user avatar
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0 answers
178 views

Windows server inaccessible through rdp or smb after being idle

Trying to figure out a problem where the server not responds to rdp or smb connections after being not used for around 3 hours (i.e. all users are out and only background services running). Two ...
SelfishCrawler's user avatar
1 vote
0 answers
956 views

Juniper EX4200-48t LACP on 10GB module not working

I'm new to Juniper products and I bough two older EX4200-48t. I setup virtual chassis and add a few LAGs with LACP. All LAGs on copper connections works fine but on the 10GB module not. The module is ...
Alex's user avatar
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2 answers
192 views

cisco sg550X support m-lag and

Please tell me Support MC-LAG (Multichassis Link Aggregation Groups) model cisco sg550x? can i use at the same time in stack for example: 1/1-2/1: M-LAG (LAG1) and 1/19-2/20,1/20-2/19: for stack ...
Decl's user avatar
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1 vote
1 answer
769 views

LACP between Netgear ProSafe GSM7248V2 and Linux server

I am trying to connect a Linux server with two 1Gbps NICs with a switch Netgear ProSafe GSM7248V2 using bonding, specifically 802.3ad mode. The results are very confusing, I would be thankful for any ...
michalt's user avatar
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2 votes
1 answer
204 views

Cisco switches LACP, lost connections

I just put up a LACP between two Cisco SG-200 switches. Unfortunately some PCs connected to these switches got problems like lost Postgres connections etc. My configuration is simple: ---------------- ...
Knowledge's user avatar
2 votes
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107 views

port channel delay coming up <> linux config

after our 5k switch reboots, due to many configured vlans, LACP/port channels take some time to come up. seems to be a serial process, and if vlans are at bottom of this list, it takes some time - ...
chimcentral's user avatar
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1 answer
223 views

Is port channeling/LACP needed with kubernetes?

I have a 6 server setup. Each server has 4 NICs with port channeling setup to my switch for redundancy and speed. My question is simply: Can kubernetes handle this without the port channeling? Or ...
neerdoc's user avatar
1 vote
1 answer
386 views

LACP doesn't work on FreeBSD VM without promiscuous mode

I'm running two identical FreeBSD 12.1-RELEASE VMs on VirtualBox. Each VM has 2 network interfaces, em0 and em1, set to Internal network mode. em0 interfaces are set to intnet0 network and em1 are to ...
arrowd's user avatar
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Why can't we ping the gateway on our Open-vSwitch network configuration on Proxmox 6.1-3?

We are trying to get open vswitch working on 10 hosts running Proxmox 6.1-3. We think we have a configuration that should work, but it doesn't and we can't ping the gateway. These are hosts with 4 ...
surfrock66's user avatar
0 votes
1 answer
654 views

ESXi LACP with DELL PowerConnect

I am using ESXi 6.7 U3 (free version) on a ProLiant SE326M1 R2 (basically a DL180 G6 equivalent). I do know, it's old - but it does its job and ESXi has not complained yet. Here is what I'm trying to ...
Yannik Z.'s user avatar
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1 vote
1 answer
2k views

LACP vs HP Trunk

Question on the performance and function of LACP vs HP "Trunk". Example, I have two HP 2910al-48G switches connected via two runs of CAT6 cable. Is there any difference in performance between setting ...
JPoole's user avatar
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1 vote
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OPNsense/pfsense on Proxmox with LACP, VLANs and Multi-WAN

I want to set up an OPNsense router (of pfsense if OPNsense sould not work as desired) on Proxmox. I have multiple WANs as well as multiple local VLANs. Since I have more VLANs than physical ports I ...
masgo's user avatar
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1 vote
2 answers
2k views

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 ...
Mateusz Bartczak's user avatar
2 votes
1 answer
4k 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, ...
BurningKrome's user avatar
2 votes
1 answer
404 views

Link aggregation on ESXi

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 and using link aggreagation. Previously this ...
Marcelo Magalhães's user avatar
4 votes
1 answer
1k 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 ...
Sakvojage's user avatar
-1 votes
1 answer
89 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)....
mekkanizer's user avatar
1 vote
1 answer
5k 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 ...
conf terminal's user avatar
1 vote
0 answers
540 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 ...
FourthWall's user avatar
1 vote
1 answer
5k 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 ...
guzzijason's user avatar
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6 votes
1 answer
14k 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 ...
Baptiste Mille-Mathias's user avatar
1 vote
1 answer
866 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 ...
Yuri's user avatar
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1 vote
1 answer
1k 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 ...
kiran K's user avatar
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3 votes
1 answer
14k 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; ...
ensnare's user avatar
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1 vote
2 answers
2k views

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 ...
1iveowl's user avatar
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0 votes
1 answer
758 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 (...
Thomas Martin's user avatar
3 votes
2 answers
2k 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?
Hessnov's user avatar
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0 votes
1 answer
2k 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 ...
Tolsadus's user avatar
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3 votes
4 answers
12k views

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....
Mat's user avatar
  • 1,913
1 vote
0 answers
652 views

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 ...
Ghost's user avatar
  • 111
3 votes
2 answers
2k 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=...
Jeremy's user avatar
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1 vote
1 answer
243 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 ...
Mat's user avatar
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1 vote
0 answers
1k 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 ...
dataCore's user avatar
  • 216
0 votes
1 answer
155 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 ...
surya's user avatar
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2 votes
0 answers
1k 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, ...
ianlot's user avatar
  • 21
2 votes
2 answers
4k 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 ...
Jaxian's user avatar
  • 169
3 votes
3 answers
2k 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 ...
user219031's user avatar
0 votes
2 answers
9k 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, ...
Hank's user avatar
  • 563
9 votes
2 answers
30k 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
1 vote
1 answer
3k 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 ...
Gorshok's user avatar
  • 29
2 votes
1 answer
159 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 ...
stuntkiwi's user avatar
5 votes
1 answer
4k 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 ...
mveroone's user avatar
  • 474