First of all, i want to say Hello, im new at this community.
I want to know how the layer 2 loops are discovered. I'm working at big enteprise network which consists of lot of devices and they are connected to catalyst 65xx switches. There was a few times, when our network was almost down, because of network loops. I know that these loops commonly occurs when the vlans are bad configured. as the senior engineers said it can be found with looking at mac-address-table. So just wanted to know base info, how loops can be found ? I would see allot mac addresses, when in normal condition we will not ? How the loop cause (vlan on wrong interface ?) are found.
Any help or links to litterature are welcome. Thanks in advance.
Have a look at this document for understanding spanning tree protocol and how it prevents loops