ccna3-mod8-VLANs - Ch. 8 VLANs (Virtual LANs) CCNA 3...

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Ch. 8 – VLANs (Virtual LANs) CCNA 3 version 3.0 Rick Graziani Cabrillo College
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Rick Graziani graziani@cabrillo.edu 2 Overview Define VLANs List the benefits of VLANs Explain how VLANs are used to create broadcast domains Explain how routers are used for communication between VLANs List the common VLAN types Define ISL and 802.1Q Explain the concept of geographic VLANs Configure static VLANs on 29xx series Catalyst switches Verify and save VLAN configurations Delete VLANs from a switch configuration
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Rick Graziani graziani@cabrillo.edu 3 VLAN introduction VLANs logically segment switched networks based on the functions, project teams, or applications of the organization regardless of the physical location or connections to the network. All workstations and servers used by a particular workgroup share the same VLAN, regardless of the physical connection or location.
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Rick Graziani graziani@cabrillo.edu 4 VLAN introduction VLANs are created to provide segmentation services traditionally provided by physical routers in LAN configurations. VLANs address scalability, security, and network management. Routers in VLAN topologies provide broadcast filtering, security, and traffic flow management. Switches may not bridge any traffic between VLANs, as this would violate the integrity of the VLAN broadcast domain. Traffic should only be routed between VLANs.
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Rick Graziani graziani@cabrillo.edu 5 Broadcast domains with VLANs and routers A VLAN is a broadcast domain created by one or more switches. The network design above creates three separate broadcast domains.
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Rick Graziani graziani@cabrillo.edu 6 Broadcast domains with VLANs and routers 1) No VLANs, or in other words, One VLAN. Single IP network. 2) With or without VLANs. However this can be and example of no VLANS. In both examples, each group (switch) is on a different IP network. 3) Using VLANs. Switch is configured with the ports on the appropriate VLAN. What are the broadcast domains in each? 1) Without VLANs One link per VLAN or a single VLAN Trunk (later) 2) With or without VLANs 1) With VLANs 10.0.0.0/8 10.1.0.0/16 10.2.0.0/16 10.3.0.0/16 10.1.0.0/16 10.2.0.0/16 10.3.0.0/16
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Rick Graziani graziani@cabrillo.edu 7 VLAN operation Each switch port could be assigned to a different VLAN.
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This note was uploaded on 04/09/2008 for the course CS 210 taught by Professor Pratchett during the Spring '06 term at ECPI College of Technology.

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ccna3-mod8-VLANs - Ch. 8 VLANs (Virtual LANs) CCNA 3...

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