View source for LACP - Aggregation Mode Comparison

[[Category:Wiki]]

== LACP 802.3ad ==

LACP 802.3ad is the IEEE standard for Link Aggregation. It enables the dynamic creation of a link aggregation group (LAG) where multiple physical links are bundled together to form a logical link. LACP automatically manages the aggregation process, ensuring that the load is balanced across the links in the group.

* Uses a negotiation process to establish aggregated links.
* Compatible with IEEE 802.3ad standard.
* Offers dynamic load balancing and fault tolerance.
* Supports Active and Passive modes for LACP negotiation.
* Enables failover if one of the links in the aggregation fails.

== Balance-rr ==

The `balance-rr` (Round Robin) mode is one of the common bonding methods used in Linux systems. It distributes outbound traffic evenly across all available network interfaces, with a simple round-robin scheduling algorithm.

* Traffic is distributed evenly across all links in a sequential manner.
* Suitable for environments where load distribution is a priority.
* Offers no failover protection if one link goes down.
* Not ideal for environments where packet order is critical, as round-robin distribution can result in packet reordering.

== Balance-xor ==

The `balance-xor` mode uses an XOR (exclusive OR) algorithm to determine how traffic is distributed across the links. It uses a combination of source and destination MAC addresses to determine the link that each packet will be sent over.

* Provides load balancing based on hash calculations from the MAC addresses of source and destination.
* Traffic distribution is deterministic and predictable.
* Offers fault tolerance in the event of link failure.
* However, if a large number of flows are directed to the same link, it can result in an unbalanced traffic distribution.

== Balance-tlb ==

The `balance-tlb` (Transmit Load Balancing) mode is a more advanced load balancing option compared to `balance-rr`. It performs load balancing at the transmit level while providing fault tolerance for receive traffic.

* Traffic is load-balanced in a way that both transmit and receive traffic are distributed across all active links.
* Can failover if one of the links fails.
* Does not require LACP or special switch support.
* A good option for improving outbound performance without requiring advanced configurations.

== Balance-alb ==

The `balance-alb` (Adaptive Load Balancing) mode improves upon the `balance-tlb` mode by adding support for adaptive load balancing. This mode automatically adapts to network traffic patterns and balances the load accordingly.

* Supports both transmit and receive load balancing without the need for LACP.
* Dynamic adjustment of traffic distribution based on the network traffic load.
* Provides fault tolerance with automatic failover.
* Suitable for environments where the network traffic varies dynamically.

== Recapitulative Table ==

{| class="wikitable"
! Mode !! Description !! Key Features !! Fault Tolerance !! Load Balancing Method !! MAC Address Usage
|-
| LACP 802.3ad || Standard IEEE 802.3ad protocol for LACP || Dynamic link aggregation, compatible with LACP negotiation, failover || Yes || Dynamic, based on LACP negotiation || Yes
|-
| balance-rr || Round-robin load balancing || Even distribution of outbound traffic, simple to configure || No || Round-robin, sequential || No
|-
| balance-xor || XOR-based load balancing based on MAC addresses || Predictable, deterministic traffic distribution || Yes || XOR of source and destination MAC addresses || Yes
|-
| balance-tlb || Transmit Load Balancing with receive fault tolerance || Simple, no need for LACP, provides fault tolerance || Yes || Based on traffic volume || No
|-
| balance-alb || Adaptive Load Balancing with transmit and receive balancing || Adaptive traffic distribution based on traffic load, fault tolerance || Yes || Dynamic adjustment based on traffic load || No
|}

== Useful Links ==

* [IEEE 802.3ad Standard](https://ieeexplore.ieee.org/document/1384027) - Official document detailing the 802.3ad standard.
* [Linux bonding driver documentation](https://www.kernel.org/doc/Documentation/networking/bonding.txt) - Detailed explanation of the bonding driver and modes in Linux.
* [Link Aggregation Control Protocol (LACP) Overview](https://www.cio.com/article/28673/networking-understanding-lacp-and-its-benefits.html) - Overview of LACP technology and its benefits.
* [Network Bonding Modes in Linux](https://wiki.archlinux.org/title/Bonding) - Arch Wiki article on various bonding modes in Linux.
* [Linux Network Bonding Howto](https://www.tldp.org/HOWTO/Bonding-Driver-HOWTO.html) - Comprehensive guide on using the Linux bonding driver.