Cisco Certification for Employees is a Plus for Your Company

We offer Cisco Training, CCNA Training and Cisco Certification upon completion of these valuable courses. The schedule can be set to your convenience. These courses offer different levels of certification, but when an employee completes Cisco Training, CCNA Training and receives Cisco Certification, these employees are now sought after and valuable employees.

The goal of passing the Cisco Training and CCNA Training and earning Cisco Certification, is to master networking as it relates to the technology being setup or worked on. The employees learn how to install, configure operate and if necessary troubleshoot the networking system.

Any company that depends on its computer network must have certified employees watching over the system. Management should make sure part of the workforce takes Cisco Training and CCNA Training leading to Cisco Certification. Without the trained staff, the cost of bringing in outsiders will be expensive. The investment in your employees' education benefits them and your company alike.

Contact us for our schedule and fees for these vital courses. They are all very comprehensive courses and when the student passes them, you are assured of an employee with skills that are respected and in demand worldwide.

The money invested in these programs, is an investment guaranteeing returns well above the initial investment. It is better to have the trained personnel in-house, then have to bring them in. The trend in these times does appear to be that your own in house staff provide you with a much better investment. So the choice is really clear!

Cisco CCNA Exam Tutorial: Cisco Discovery Protocol (CDP)

The Cisco Discovery Protocol (CDP) sure looks simple enough, but there are quite a few details to know for success on the CCNA exam. In your CCNP studies, you'll be introduced to additional uses for CDP, but for now it's enough to know that CDP is designed to give you information regarding directly connected Cisco routers and switches.

CDP runs by default between all directly connected Cisco devices. CDP is also a Cisco-proprietary protocol - if the directly connected device is not a Cisco device, you won't see the information you wanted.

The basic CDP command to display information about the directly connected neighbor is "show cdp neighbor".

R2#show cdp neighbor

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r – Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID

R1 BRI0 167 R 2521 Dialer1

This command is particularly helpful when troubleshooting Cisco switches. There’s no need to trace wiring in a rack of Cisco devices to see what routers are connected to a Cisco switch when show cdp neighbor can be used. In the above output, you can see the remote device's hostname, what interface on the remote device is connected to the local device, the capability of the remote device, the remote device’s hardware platform, and the local interface that is connected to the remote device.

CDP can be disabled at both the global and interface level. To disable CDP at the interface level, run no cdp enable on the interface, and cdp enable to turn it back on.

cdp timer defines how often CDP packets are transmitted, and cdp holdtime defines how long a device will hold a received packet.

To turn CDP off for the entire router, run no cdp run. To view the current global status of CDP, run show cdp.

R2#show cdp

Global CDP information:

Sending CDP packets every 60 seconds

Sending a holdtime value of 180 seconds

CDP is running by default.

R2#conf t

R2(config)#cdp timer 45

R2(config)#cdp holdtime 100

The CDP timers are changed.

R2#show cdp

Global CDP information:

Sending CDP packets every 45 seconds

Sending a holdtime value of 100 seconds

The CDP values have been successfully changed. “show cdp interface” will give the timer information for each interface on the router.

R2#conf t

R2(config)#interface bri0

R2(config-if)#no cdp enable

CDP is disabled on the BRI interface. This does NOT have to be done to keep the line from dialing.

R2#conf t

R2(config)#no cdp run

CDP is disabled globally.

R2#show cdp

% CDP is not enabled

CDP has been successfully disabled.

Show cdp neighbor gives you a great deal of information, but what if you need the neighbor’s IP address? Just run show cdp neighbor detail. You will get even more information about that directly connected neighbor, including its IP address.

SW2#show cdp neighbor detail

-------------------------

Device ID: R4

Entry address(es):

IP address: 172.12.23.4

Platform: cisco 2520, Capabilities: Router

Interface: FastEthernet0/4, Port ID (outgoing port): Ethernet0

Holdtime : 158 sec

The details of CDP are important to you on the job and in the CCNA exam room. When you find yourself negotiating a badly documented network, you can use CDP to "walk" through the network and create a network map for your client as well. Sometimes the simplest protocols are the most helpful!

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Comcast is one of the biggest and best digital cable providers in the U.S. Comcast customers enjoy over 275 cable channels, as well as added extras like their Video-On-Demand service, with over 10,000 titles currently available.