lan switching and wireless: ch1 - lan design

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

LAN Switching and Wireless

CH1: LAN DESIGN

بسيطة الحقيقة إن

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Notes

• If you found any mistake’s’ on my PowerPoint slides or if you have any other questions or comments, please feel free to email me at abdu.elsaid@yahoo.com or abdu.elsaid@gmail.com .

Thanks! Abdelkhalik Elsaid MosaFCI – SCU - EgyptCisco Networking Academy

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Switching & L2 Devices

• Switching: means receiving data on a certain port and forwarding it to appropriate port transparently, just care about the next hop, so it is a layer 2 action.

• Transparent Switching meansHosts don’t aware of the presence of the switch in LAN.The switch doesn’t change the frame.

• Layer 2 devices are1.NIC2.Bridge3.Switch

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

The Hierarchical Network Model

• Hierarchical network design involves dividing the network into discrete layers. These layers are easier to manage and expand, and problems are solved more quickly.

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

The Hierarchical Network Model

• Access Layer: Connects end devices to the network and controls which devices are

allowed to communicate on the network. Includes routers, switches, bridges, hubs, and wireless AP.

• Distribution Layer: Aggregates the data received from the access layer switches before it is

transmitted to the core layer. Controls the flow of traffic using policies and delineates broadcast

domains by performing routing between VLANs. Its Switches are highly available and redundant to ensure reliability.

• Core Layer: Is the high-speed backbone of the internetwork. Should be highly available and redundant. Collapsed Core, distribution and core layers are combined into 1 layer.

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Benefits of a Hierarchical Network

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Hierarchical Network Design Principles: Network Diameter

• Network diameter is the number of devices that a packet has to cross before it reaches its destination.

The smaller, the better.

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Hierarchical Network Design Principles: Bandwidth Aggregation

• Bandwidth Aggregation is implemented by combining several parallel links between two switches into a logical link.

EtherChannel

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Hierarchical Network Design Principles: Redundancy

• Modern networks use redundant links between hierarchical network layers in order to ensure network availability.

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

What is a converged network

• Is a network that allows for voice, video and data to use the same IP network.”Multiple services on one network”

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Switch Features: Form Factors (Fixed, Modular and Stackable)

Cisco StackWise technologyUp to 9 switches

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Switch Features: Performance (Port Density)

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Switch Features: Performance (Forwarding Rates & Link Aggregation)

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Switch Features: PoE

• Power over Ethernet allows the switch to deliver power to a device over the existing Ethernet cabling.

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Switch Features: L3 Functions

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Access Layer Switch Features

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Distribution Layer Switch Features

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Core Layer Switch Features

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Layer Features of the hierarchical Model

A. E. Mosa

Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy

Features of Cisco Catalyst Switches

Suez Canal University – Faculty of Computers & Informatics - Local Cisco Academy

Thank You..