Topic 05 - LAN-VLAN design.pdf - Topic 05 LAN VLAN design...

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Topic 05 LAN, VLAN design
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Announcements Open Day lecture posted on moodle
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Main points Design requirements What can a designer “play with”? Design constraints & tradeoffs Hierarchical design methodology Modular design methodology
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LAN Design requirements R1: L2 Connectivity R2: Fault tolerance (Redundancy) R3: Scalability R4: QoS (e.g., VoIP support) R5: Performance R6: Manageability Many others exist (cost, security)
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LAN design “knobs” What is a “knob” in LAN design? K1: Type of switches K2: Number of switches K3: Placement of switches K4: Placement of functionalities K5: Choice of the STP variation Can you think of others?
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Non-Hierarchical design Objective: R1 only What is the bandwidth here?
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Segmentation (Ignore VLANs) What is the bandwidth here?
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Hierarchical design K1, K2, K3: Knobs for R1, R2, R3 Layered approach (3 or 2 layers) Access Distribution Core
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Scalability – R3 Objective: R1; R5 (performance) What is the bandwidth here?
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