Presentation is loading. Please wait.

Presentation is loading. Please wait.

HELLO WORLD!!! Run Project 2: WELCOME Subject: Virtual LAN’s

Similar presentations


Presentation on theme: "HELLO WORLD!!! Run Project 2: WELCOME Subject: Virtual LAN’s"— Presentation transcript:

1 HELLO WORLD!!! Run Project 2: WELCOME Subject: Virtual LAN’s
\dterri3\rmira1 HELLO WORLD!!! Run Project 2: WELCOME Subject: Virtual LAN’s By: Michael Alford, RD Mira, Branden Terribile. Enjoy!!!

2 Loading Project Outline:
\dterri3\rmira1 Run Project 2: Loading Project Outline: Presentation Overview Virtual LANs History of VLANs Why use VLANs Setup 1 Switch = 2 VLANs Configuring a VLAN-capable Switch Trunking Virtual Trunk Protocol InterVLAN Routing

3 Virtual LAN’s VLAN – collection of nodes grouped together in a single broadcast domain based on something other than physical location LAN bridge Filtering databases IEEE 802.1Q Draft Standard Today’s LANs are complex Many networks have remote incoming connections, public Web or servers, wireless networks, as well as the basic string of connected switches Leaving all of these different features on a single broadcast domain creates a tremendous amount of broadcast traffic and creates a security nightmare Basically, a VLAN is a collection of nodes that are grouped together in a single broadcast domain that is based on something other than physical location. Virtual local area network (VLAN) – allow you to segment the network using switches you already have To create a VLAN, take a single physical broadcast domain and chop it up into multiple virtual broadcast domains Require special switches loaded with extra programming to create the virtual networks Since this is a logical segmentation and not a physical one, workstations do not have to be physically located together Users on different floors of the same building, or even in different buildings can now belong to the same LAN

4 History of VLAN Developed by Dr. W. David Sincoskie (1984)
Addressed the problem of scaling up Ethernet Invented VLANs by adding a tag to each Ethernet packet By sending a mix of different packets, bandwidth could be improved 802.1Q header, or VLAN tag History of VLAN Dr. W. David Sincoskie (1984) Addressed the problem of scaling up Ethernet However, no good way of connecting multiple Ethernet network together Sincoskie invented VLANs by adding a tag to each Ethernet packet Tags could be thought of as colors –ex. Red, green, or blue Each switch could be assigned to handle packets of a single color and ignore the rest By sending a mix of different packet colors, bandwidth could be improved Color is now known in the Ethernet frame as the 802.1Q header, or VLAN tag

5 Why use VLANs? VLANs have several advantages Performance
Formation of Virtual Workgroups Simplified Administration Reduced Cost Security Why use VLANs? Performance VLAN’s can reduce the need to send such traffic to unnecessary destinations VLAN’s reduce the number of routers needed Formation of Virtual Workgroups Can contain broadcasts and multicasts within a temporary workgroup Simplified Administration If a user is moved in a VLAN, most administrative work (i.e. recabling, new station addressing, & reconfiguration) can be reduced or eliminated. Reduced Cost VLAN’s can be used to create broadcast domains which eliminate the need for expensive routers Security Placing certain users who have access to certain data on a VLAN can reduce the chances of an outsider gaining access to the data.

6 Setup How to set it up: Single physical broadcast domain and chop it up Require special switches.

7 1 Switch = 2 VLANs “VLAN” plus a # Ex. VLAN1 or VLAN2
Switch with 2 VLANs Multiple ways to support VLANs Assign ports to a VLAN Assign MAC addresses to determine VLAN membership

8 Configuring a VLAN-Capable Switch
Access the switch with a Web browser interface.

9 Configuring a VLAN-Capable Switch
Define VLANs

10 Configuring a VLAN-Capable Switch
Assign computers’ MAC addresses to VLANs or assign ports to VLANs

11 Trunking Transferring VLAN traffic between two or more switches
A port on each switch must be configured as a trunk port. Trunk Port

12 Virtual Trunk Protocol
Used to automate the updating of multiple VLAN switches 3 Stages Server Client Transparent All the connected client switches update their configurations within minutes

13 InterVLAN Routing Process of making a router work between two VLANS is interVLAN routing. Each VLAN becomes its own broadcast domain. No way for data to get from one VLAN to another unless you use a router


Download ppt "HELLO WORLD!!! Run Project 2: WELCOME Subject: Virtual LAN’s"

Similar presentations


Ads by Google