www.rockonaltitude.com - Shwayze and Cisco backstage at Warped Tour. Raw, Uncut, Uncensored
http://www.youtube.com/watch?v=NOahttMJF7M&hl=en
Thanks To : cisco vpn client
Cisco Systems Recruiting Video
http://www.youtube.com/watch?v=MdQ9lQ-i0u8&hl=en
The Cisco Discovery Protocol (CDP) It looks simple enough, but there are definitely a few details to know for success on the CCNA exam. In your CCNP studies, you will introduce additional applications for CDP, but for now it's enough to know that CDP is designed, is give you information regarding directly connected Cisco routers and switches.
CDP by default between all directly connected Cisco devices. CDP is a Cisco proprietary protocol - if thenot directly connected device is a Cisco device, you will not have the desired information.
The basic CDP command is to provide information about the directly connected neighbors display "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 BRI0167 R 2521 Dialer1
This command is especially useful when troubleshooting Cisco switches. There is no need to see wiring in a rack of Cisco equipment to trace what must be changed to a Cisco router when show cdp neighbor can be used together. In the above output, you can be the remote device the hostname, which is connected interface on the remote device to see, with the local device, the ability of the remote device, the remote controlDevice hardware platform and the local interface is connected to the remote device.
CDP can be disabled at the global level and interface. To disable CDP at the interface level, enabling run no cdp enable CDP on the interface and to make it again.
CDP timer determines how often CDP transmitted packets, and CDP holdtime defines how long a device will hold a received packet.
To turn off CDP for entire router, run no cdp run. To see the current globalStatus of the CDP show cdp run.
R2 # show cdp
Global CDP information:
Sending CDP packets every 60 seconds
Send a hold time value of 180 seconds
CDP runs by default.
R2 # conf t
R2 (config) # cdp timer 45
R2 (config) # cdp holdtime 100
The CDP timer to be changed.
R2 # show cdp
Global CDP information:
Sending CDP packets every 45 seconds
Send a holding time of 100 seconds
The CDP values have been successfullychanged. "Show cdp interface is" 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 is not done to keep the line from dial out.
R2 # conf t
R2 (config) # no cdp run
CDP is globally disabled.
R2 # show cdp
% CDP is not enabled
CDP has been successfully disabled.
Show cdp neighbor offers a wideof information, but what if your neighbor's IP address? Simply show cdp neighbor detail. You will receive more information about the directly connected neighbors, including the 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
Hold Time: 158sec
The details of the CDP are important to you in the job market and in the CCNA exam room. If you are negotiating a poorly documented network, you can create CDP "walk" through the network and a network for your customers, as well. Sometimes the simplest protocols are the most helpful!
