二零二三年 优质公开课SwitchedNetwork.pptx

《HCNA-HNTD Fast Training》Establishing a Single Switched Network 课程团队：叶礼兵 王苏南 张悦 吴伟强 Foreword The introduction of a switching device as part of the enterprise network demonstrates how networks are able to expand beyond point-to-point connections, and shared networks in which collisions may occur. The behavior of the enterprise switch when introduced to the local area network is detailed along with an understanding of the handling of unicast and broadcast type frames, to demonstrate how switches enable networks to overcome the performance obstacles of shared networks.Page 2 Objectives Upon completion of this section, trainees will be able to:Explain the decision making process of a link layer switchConfigure parameters for negotiation on a link layer switchPage 3 Building a Single Switched NetworkPage 4G0/0/2Switch AHost AHost CHost BIP: 10.1.1.1/24MAC:00-01-02-03-04-AAIP: 10.1.1.2/24MAC:00-01-02-03-04-BBIP: 10.1.1.3/24MAC:00-01-02-03-04-CCG0/0/1G0/0/3Switches operate within the scope of the data link layer. The Initial State of The SwitchPage 5MAC Address TableMACInterfaceSwitch AHost AHost CHost BIP: 10.1.1.1/24MAC:00-01-02-03-04-AAIP: 10.1.1.2/24MAC:00-01-02-03-04-BBIP: 10.1.1.3/24MAC:00-01-02-03-04-CCG0/0/1G0/0/2G0/0/3Each switch uses a MAC table for making forwarding decisions. MAC Address Learning01-02-03-04-AAFF-FF-FF-FF-FF-FFARPSMDMSwitch AHost AHost CHost BIP: 10.1.1.1/24MAC:00-01-02-03-04-AAIP: 10.1.1.2/24MAC:00-01-02-03-04-BBIP: 10.1.1.3/24MAC:00-01-02-03-04-CCG0/0/1G0/0/2G0/0/3MAC Address TableMACInterface00-01-02-03-04-AAG0/0/1The source MAC addresses of received frames are recorded. Forwarding The First Data01-02-03-04-AAFF-FF-FF-FF-FF-FFARPSMDMG0/0/3Switch AHost AHost CHost BIP: 10.1.1.1/24MAC:00-01-02-03-04-AAIP: 10.1.1.2/24MAC:00-01-02-03-04-BBIP: 10.1.1.3/24MAC:00-01-02-03-04-CCG0/0/1G0/0/2Frames destined for unknown link layer destinations are flooded. The Destination ReplyPage 8MACInterface00-01-02-03-04-AAG