lan switching and wireless: ch1 - lan design
DESCRIPTION
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. Examples of Layer 2 devices: NIC, Bridge and Switch. Hierarchical network design with access, distribution and core layers. The benefits of the hierarchical network design. Understanding hierarchical network design principles such as network diameter, bandwidth aggregation and redundancy. The definition converged network. Understanding different switch features: 1. Form Factors (Fixed, Modular and Stackable) 2. Performance (Port Density) 3. Performance (Forwarding Rates & Link Aggregation) 4. Power over Ethernet 5. L3 Functions Access Layer Switch Features. Distribution Layer Switch Features. Core Layer Switch Features Features of Cisco Catalyst SwitchesTRANSCRIPT
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
LAN Switching and Wireless
CH1: LAN DESIGN
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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 [email protected] or [email protected] .
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..