IBM Flex System and PureFlex System Network Implementation with Cisco Systems

Layer 2 Overview

This chapter explains the Layer 2 fundamental networking protocols and terminology used in the rest of this book.

This chapter includes the following sections:

•Basic Frame Forwarding Concept

•Virtual local area network (VLAN) and tagging

•Spanning tree

•Dynamic Link Aggregation Control Protocol (LACP)

•Virtual Link Aggregation Groups (VLAG)

•Cisco Virtual Port Channel (vPC)

•Link Layer Discovery Protocol (LLDP)

•Layer 2 Failover

3.1 Basic Frame Forwarding Concept

Each frame contains a source and a destination MAC address. A network ...