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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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How exactly & specifically does layer 3 LACP destination address hashing work?

Based on an earlier question over a year ago (Multiplexed 1 Gbps Ethernet?), I went off and setup a new rack with a new ISP with LACP links all over the place. We need this because we have individual servers (one application, one IP) serving up…
Stu Thompson
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VMware Distributed vSwitches (VDS) - Design, theory, *real* use cases and examples?

I'm starting to explore VMware Distributed Switches (dvSwitches or VDS) for use in existing and new installations. Assume VMware version 5.1 and newer with Enterprise Plus licensing. Prior to this, I've made good use of standard vSwitches defined…
ewwhite
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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 (S1) has 4x 1Gbit ethernet connections; Server 2…
Zetten
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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 file server to 2-4 clones in parallel. We were…
Warren Young
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Does a single LACP channel over multiple switches increase redundancy?

I am curious for opinions, findings, or evidence that having multiple interfaces bonded using LACP to ports in multiple switches can increase redundancy. Previously bonded interfaces have always been to a single switch, with a redundant channel to…
Sirch
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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 for many years. Periodically I run into a dead-end…
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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, VNX, Linux ZFS), and may introduce a Nimble iSCSI…
ewwhite
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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 src-dst-mac ! interface Port-channel1 switchport…
Ammar Lakis
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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 this methodology double bandwidth for a single…
ensnare
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Layer 2 Loop Avoidance: Three Switches in Series

I know this seems like a homework question, but it's actually part of a larger project (and network) and need to break it down into chunks so I'm clear with what I'm doing. I've never worked with [R/M]STP and have only setup a static LAG before, so…
WuckaChucka
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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 configured with LACP. Everything seems to be ok,…
Baptiste Mille-Mathias
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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 vPC configured to enabled multi-chassis LACP. …
Tolli
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Best way to provide redundant switching/links to server

We have 3x ESX hosts and 2x SANS that we wish to move to a redundant 10G networking infrastructure. We have 4x Dell PowerConnect 8024F's to provide our backbone and are configured as so (only core switches relevant to this question): So the…
Myles Gray
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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 and a handful of servers (I'll leave it at that…
aj4525
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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 connect each of them to a different switch that…
sagi
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