Switching in an Enterprise Network. Introducing Routing and Switching in the Enterprise – Chapter 3. Objectives. Compare the types of switches used in an enterprise network. Explain how Spanning Tree Protocol prevents switching loops. Describe and configure VLANs on a Cisco switch.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Introducing Routing and Switching in the Enterprise– Chapter 3
2) Comcast. (2007). Comcast High Speed Internet. Retrieved on September 10, 2007 from http://www.comcast.com/highspeedoffer-s/?CMP=KNC 1TO1Q3GOOGLE30&s_kwcid=comcast%20internet|751518367.
Reflection #1, Investigations into CAM
ASICs can consolidate the work of many chips into a single, smaller, faster package, reducing manufacturing and support costs while boosting the speed of the device built with them. ASIC technology is now so advanced that many functions traditionally implemented in software can be migrated to ASICs.
Complete the lab in packet tracer
Reflection #2, Redundancy Failures
If two switches on the same network can cause so many problems is there any way to support redundancy?
A fifth state, disabled, indicates that the administrator has shut down the switch port.
Since switches typically use the same default priority value <32768>, the switch with the lowest MAC address becomes the root bridge. We can force selection by changing the priority value.
STP is not instantaneous
This calculation and transition period takes about 30 to 50 seconds on each switch. During this recalculation, no user data passes through the recalculating ports.
Reflection #3, Communities of Interest
It allows an administrator to group together stations by logical function, by project teams, or by applications, without regard to physical location of the users.
Return to the VLAN network diagram for the four communities of interest, and prepare a table in Word that maps the MAC addresses to the appropriate VLAN. This table would be used if we were to use dynamic VLANs
That was a Ton of new information!
You used to be required to use certain cable types (cross-over, straight-through) when connecting between specific devices, switch-to-switch or switch-to-router. Instead, you can now use the mdix auto interface configuration command in the CLI to enable the automatic medium-dependent interface crossover (auto-MDIX) feature.
Modern Cisco switches have a number of web-based configuration tools that require that the switch is configured as an HTTP server
Create the Vlan ID
Name the VLAN
Assign at least one switch port to the VLAN to make it active
This command shows all VLAN assignments
This command limits information for one specific VLAN
When a port is disassociated from a specific VLAN, it returns to VLAN1
802.1q is now default tagging protocol on Cisco switches
Carry multiple-VLAN traffic over single link
Since a switch is a server by default, this results in new, but incorrect, information overwriting the legitimate VLAN information on all of the other switches