An Overview of Link Aggregation and LACP

The Network Way - Nir Yechiel's blog

The concept of Link Aggregation (LAG) is well known in the networking industry by now, and people usually consider it as a basic functionality that just works out of the box. With all of the SDN hype that’s going on out there, I sometimes feel that we tend to neglect some of the more “traditional” stuff like this one. As with many networking technologies and protocols, things may not just work out of the box, and it’s important to master the details to be able to design things properly, know what to expect to (i.e., what the normal behavior is) and ultimately being able to troubleshoot in case of a problem.

The basic concept of LAG is that multiple physical links are combined into one logical bundle. This provides two major benefits, depending on the LAG configuration:

  1. Increased capacity – traffic may be balanced across the member links to provide…

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