What is CDP | Cisco Discovery Protocol | Free CCNA

welcome to Network kings so what a CD b CD b stands for cisco discovery protocol so this protocol is cisco rightly you cannot run on any other vendors devices and it collect information about cisco neighbor devices so this is my cisco router and this is also from cisco switch and this is also score outer so this router has information about this switch and this router also so CDP will be sent after every 60 seconds so this router sends 60 seconds CD b packet so this switch also sent CD b packet in every 60 seconds so same with these two routers also so hold down is 180 so basic ones are so CDP neighbors and shows CDP neighbors detail if you want to check in detail so i am going to check on packet tracer so in packet eraser I am taking one router 2811 again one two nine zero one router and one switch which is of 35 60 so okay so I'm just creating this switch and with this so I'm going to configure here 192 168 dot one dot hundred so on ax is zero and these configure 1.1.1 and another router i will configure one or two so let's configure so on this router go to CLI so on interface fa 0/1 give IP address 192 168 dot one dot hundred with subnet mask over shutdown and on interface F is zero slash zero I have addressed my IP address 100 100 1.1 with default subnet mask of 255.0.0.0 on so this is my Giga put IP addresses hundred 100 102 okay so let's check over come on so what is the command show CDP neighbors okay show CDP neighbors so this router is saying my on my interface F is zero one one device is connected the name or switches switch and the platform is thirty five sixty it means it is a switch and it's port which is connected to me F is Ruth 1 FA 0 / 1 so if I will configure hostname hostname for example networking's switch so I'll check so you can clear CDP table clear CDP table and check again after 60 seconds they will send the CDP message it will take time so show CDP neighbors hostname is too lengthy that's worth showing like this networking's and one is router half is 0-1 so if you want to disable CDP on this particular interface so what is the command can interface i want to disable CDP I don't want to share all my details to switch and switch and like this is no CDP enable okay so it will receive the information but doesn't pass this information to 3560 this switch so this is old information so to clear CDP table it will not send because CDP's disabled here if you want to configure like if you want to disable CDP on complete router one is command no CDP run if you want to completely disable this protocol this is the command to again enabling CDP row so CDP neighbors this is the command if you want to check in detail this is the detail come on I disabled that's why it's not showing so it come show CDP neighbor detail so so my device is router at the other side its IP address is one or one or two twenty nine hundred series router capabilities router it means it can sport routing so I always have software is twenty nine hundred and from Cisco duplex is full CDP version is two right now on another switch and if I'll check from here show CDP neighbors retain so version eight to duplex full twenty 800 series router IP adresses 1.1.1 and interfaces gigas zero zero zero and outgoing port is FA 0 0 slash 0 this side so this is CDP you can check all the details of your neighbors whether you have configured IP address or not like if I will remove IP address from FA 0 / what is the port number F is Drusilla 0 no IP address so it will show or not yes it will show so CDP neighbors so if you want to check on simulation mode one real-time we have simulation mode added filters and I want to check you slept on CDP only okay and I just want to send packet this is ICMP packet but like I think this is UDP packet yeah this is CDP frame snap CDP so here this is CDP packet and CDP valeu protocol address and all things in this CDP packet so this is the written over weather CDV processes received a neighbor device ID neighbor port ID neighbor capabilities neighbor version neighbor platform all the these things in CDP packet so you can check from simulation added filters on select all all and choose CDP by default all protocols are enabled and came back to real time mode so this is all about CDP

Channel: Network Kings

Views: 15,701

Keywords: CDP, CCNA TRAINING, Cisco Discovery Protocol (Internet Protocol), CCNA (Field Of Study), networks, free ccna, 200-120, 640-802, networkkingss, Link Layer Discovery Protocol, packet, tracer

Id: _JAm2G6rFaE

Length: 8min 41sec (521 seconds)

Published: Thu Feb 06 2014