Configuring VLANs

Three methods can be used to assign a switch port to a particular VLAN: port-centric, static , and dynamic . In a port-centric configuration, all nodes that are connected to ports within the same VLAN are given the same VLAN ID. In this type of configuration, the network administrator's job is much easier because of the ease of administering the VLAN. In a static VLAN configuration, the ports on a switch are hard-coded and remain in effect until the administrator changes them. This type of configuration is typical of a network that is very well monitored and where changes are unlikely . The third type of port configuration is dynamic. This type of configuration involves more overhead on setup for the administrator because of the database configuration. The ports on these switches automatically determine their assigned VLAN. The VLAN assignment is determined by the type of protocol (within a frame), MAC address, and logical addressing. A major benefit of this type of configuration is that the administrator will notice when any unauthorized or new user is on the network. If a workstation happens to be connected to a port that is unassigned , the switch will record the MAC address of the workstation and check its database to determine which VLAN to assign the workstation to.



CCNA Exam Cram[tm] 2 (Exams 640-821, 640-811, 640-801)
CCNA Exam Cram[tm] 2 (Exams 640-821, 640-811, 640-801)
ISBN: 789730197
EAN: N/A
Year: 2005
Pages: 155

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