An EtherChannel is a way to use multiple physical interfaces as a single logical one. That logical one appears as a single interface to MAC table, STP and management plane. That solves two main concerns: it adds bandwidth and it prevents STP from considering several parallel links a loop, thus preventing it from being blocked.
Here comes a really tough design question from one of my co-workers: What is a good estimation of the maximum number of hosts per ethernet domain (i.e. VLAN)? Well, when I was first studying networking in college, we generally accepted that about 250 hosts should be the limit and enough for everybody. It was years ago, so let’s… Read More »