Chapter 1: LAN Design Chapter 1: LAN Design CCNA Exploration 4.0 1 Overview Học viện mạng Bach Khoa - Website: www.bkacad.com 2 Introduction to life cycle of a network Học viện mạng Bach Khoa - Website: www.bkacad.com 3 Enterprise Network Học viện mạng Bach Khoa - Website: www.bkacad.com 4 Objectives Học viện mạng Bach Khoa - Website: www.bkacad.com 5 Principles of Design • Redundant Network Design Topologies • Hierarchical Network Desi g n g • Modular Network Design • Secure Network Design Topologies Học viện mạng Bach Khoa - Website: www.bkacad.com 6 Enterprise Campus Design Methodology Học viện mạng Bach Khoa - Website: www.bkacad.com 7 Hierarchical Hierarchical Network Model Network Model Học viện mạng Bach Khoa - Website: www.bkacad.com 8 Switched LANs, access layer overview The hierarchical design model includes the following three layers: • The access layer provides users in workgroups access to the network. Th di t ib ti l id li bd tiit • Th e di s t r ib u ti on l ayer prov id es po li cy- b ase d connec ti v it y. • The core layer provides optimal transport between sites. – The core layer is often referred to as the backbone. Học viện mạng Bach Khoa - Website: www.bkacad.com 9 Enterprise Campus Infrastructure • Access Layer Học viện mạng Bach Khoa - Website: www.bkacad.com 10 [...]... Virtual LAN (VLAN) routing – Any media transitions that need to occur – Security Học viện mạng Bach Khoa - Website: www.bkacad.com 13 Distribution layer switches 4500 • • • • • 6500 Distribution layer switches are the aggregation points for multiple access layer switches The switch must be able to accommodate the total amount of traffic from the access layer devices The distribution layer combines VLAN... network in the event of a single device failure Học viện mạng Bach Khoa - Website: www.bkacad.com 16 Core Layer Switches 6500 • • • • 4500 In a network design, the core layer can be a routed or Layer 3 core design routed, 3, core Core layer switches are designed to provide efficient Layer 3 functionality when needed Factors such as need, cost, and performance should be considered before a choice is made... recommended design is redundant distribution layer switches and redundant connections to the core with a Layer 3 link between the distribution switches Access switches should have redundant connections to redundant distribution switches Học viện mạng Bach Khoa - Website: www.bkacad.com 21 Managing Oversubscription and Bandwidth Học viện mạng Bach Khoa - Website: www.bkacad.com 22 Hierarchical Network Design. .. 15 Core Layer • • • • • The core layer is a high-speed switching backbone If they do not have an associated router module, an external router is used for the Layer 3 function This layer of the network design should not perform any packet manipulation Packet manipulation, such as access list filtering, would slow down the switching of packets Providing P idi a core infrastructure with redundant alternate . Chapter 1: LAN Design Chapter 1: LAN Design CCNA Exploration 4.0 1 Overview Học viện mạng Bach Khoa - Website: www.bkacad.com. Website: www.bkacad.com 5 Principles of Design • Redundant Network Design Topologies • Hierarchical Network Desi g n g • Modular Network Design • Secure Network Design Topologies Học viện mạng Bach. network design the core layer can be a routed or Layer 3 core • In a network design , the core layer can be a routed , or Layer 3 , core . • Core layer switches are designed