CCNA lab Review 2. CDP and Static Routing

CDPCommand

Show cdp neighbors displays connected network devices

Show cdp display CDP Global Information

Show cdp entry * displays all information about all adjacent routers.

Show cdp entry WORD (vro name) displays all information about the vro.

Un all disable all DEBUG information

(Config) # cdp run start CDP protocol

Disconnect (Port Number) disconnects from this port

Show cdp interface (port) displays CDP information for this port

Clear cdp counter clear CDP counters

Static Routing command

R-A (config) # ip route x. x. x. x (arriving at ip segment) x. x. x. x (subnet mask) x. x. x. x (Next Hop IP address)

R-A (config) # show ip route

The following figure shows the topology.

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PC-A: ip: 192.168.1.1/24gw: 192.168.1.250

Sw-A: ip: 192.168.1.2/24gw: 192.168.1.250

R-A: ip: fa0/0: 192.168.1.250

S0/3/0: 10. 0.0.1

R-B: ip: fa0/0: 192.168.2.250

S0/3/0: 10. 0.0.2

Sw-A: ip: 192.168.2.2/24gw: 192.168.2.250

PC-A: ip: 192.168.2.1/24gw: 192.168.2.250

Add a static route on the R-A and R-B

R-A (config) # ip route 192.168.2.0255.255.255.0 10.0.0.2

R-B (config) # ip route 192.168.1.0255.255.255.0 10.0.0.1

Finally verify PC-A ping PC-B

Verify CDP command

Explanation: 1. Send the CDP update information package every 60 seconds.

2. The information is kept for 180 seconds.

3. cdp Version 2

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Same as above-some default versions are 1

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Modify the Update Time and retention time of the CDP timer. The modified time is to update the 90 s retention time to 240 s)

SW1 # conf t

SW1 (config) # cdp?

Advertise-v2 CDP sends version-2 advertisements

Holdtime Specify the holdtime (in sec) to be sent in packets

Timer Specify the rate at which CDP packets are sent (in sec)

Run

SW1 (config) # cdp timer 90

SW1 (config) # cdp holdtime 240

SW1 (config )#

SW1 # show

SW1 # show cdp

Global CDP information:

Sending CDP packets every 90 seconds

Sending a holdtime value of 240 seconds

Sending CDPv2advertisements is enabled

Enable or disable cdp

Run the command: Disable no cdp run to open cdp run.

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Run the show cdp neighbors command to display connected network devices.

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Device ID: Host Name of the directly connected Device

Local interface: the port or interface for receiving CDP groups (Local devices directly controlled)

Holdtime: the amount of time that the router will save before discarding the received information.

Capability: the type of a neighboring device, such as a router, switch, or repeater.

Platform: the cisco device model that is directly connected to the router R-A.

Port ID: The interface used by the device that is directly connected to the router R-A when an update is sent.

Display details of all adjacent Devices

Command: show cdp entry * or show cdpentry + device name

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Display the cdp information of the interface. Run the command: showcdp interface.

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Disable the cdp function of an interface and run the command: Enter the interface mode after the specified Interface) no cdp enable

Open and vice versa cdpenable

Static Routing

Without adding any route in the topology in the figure, ping the PC-A in the PC-B is not available

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Add routes on R-A and R-B respectively

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View the route table and perform ping test. The answer is "pass"

Where: C indicates a direct connection route, S indicates a static route, and R indicates a dynamic route.

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This article is from the "beyond and beyond" blog, please be sure to keep this source http://franksyl.blog.51cto.com/3207517/1293618