Quickcomputerstips
- What does the show CDP command do?
- What is CDP device?
- What information can you discern from the output of the CDP command?
- What is CDP neighbors command?
- What is show command in Cisco?
- Which information does the show interface command display?
- What is CDP in Cisco switch?
- What is CDP global settings?
- How do I enable CDP on my router?
- What do the routing tables of a router keep track of?
- Which additional details does the show CDP neighbors detail?
- What is Port ID in CDP?
- Is CDP enabled by default?
- Is CDP a Layer 2?
What does the show CDP command do?
To display detailed information about neighboring devices discovered using CDP, use the show cdp neighbors command in privileged EXEC mode. (Optional) Displays detailed information about a neighbor (or neighbors) including network address, enabled protocols, hold time, and software version.
What is CDP device?
Cisco Discovery Protocol (CDP) is a proprietary Data Link Layer protocol developed by Cisco Systems in 1994 by Keith McCloghrie and Dino Farinacci. It is used to share information about other directly connected Cisco equipment, such as the operating system version and IP address.
What information can you discern from the output of the CDP command?
From the output of the show cdp neighbors command above, you can see the neighboring devices (capability, i.e., router or switch), model number (platform), your port connecting to that device (local interface), and the port of the neighbor connecting to you (port ID).
What is CDP neighbors command?
The show cdp neighbors detail command reveals the IP address of a neighboring device. The show cdp neighbors detail command will help determine if one of the CDP neighbors has an IP configuration error. To disable CDP globally, use the global configuration command no cdp run.
What is show command in Cisco?
The show IP route command displays every known connected and destination network, the method used to learn about these networks, the next-hop IP address and the local interface used to get to each known destination network.
Which information does the show interface command display?
Displays collected interface statistics and any current alarms on the specified interface.
What is CDP in Cisco switch?
CDP is a device discovery protocol that runs over Layer 2 (the data link layer) on all Cisco-manufactured devices (routers, bridges, access servers, and switches) and allows network management applications to discover Cisco devices that are neighbors of already known devices.
What is CDP global settings?
Cisco Discovery Protocol (CDP) is data link layer protocol that allows you to find information about the connections between devices. ... The default settings send CDP packets every 60 seconds, using CDPv2 as the protocol version, and the receiving device retains that information for 180 seconds.
How do I enable CDP on my router?
To enable CDP globally, use “cdp run” on the router configuration mode. To enable CDP on a specific interface, use “cdp enable” command on the interface configuration mode. By default CDP is already enabled. You can also disable CDP by using “no cdp enable” command.
What do the routing tables of a router keep track of?
A routing table is a database that keeps track of paths, like a map, and uses these to determine which way to forward traffic. ... With hop-by-hop routing, each routing table lists, for all reachable destinations, the address of the next device along the path to that destination: the next hop.
Which additional details does the show CDP neighbors detail?
Device ID, interface type and number, holdtime settings, capabilities, platform, and port ID information about neighbors is displayed.
What is Port ID in CDP?
Port ID – the neighbor device's interface on which the CDP packets were sent, in this case Fa0/1.
Is CDP enabled by default?
After CDP is running on your device, by default, CDP is enabled on all interfaces of the device. At times, you may want to disable CDP — for example, on the external interface of the Internet router connected to your ISP because the ISP does not need the details about the internal network configuration.
Is CDP a Layer 2?
CDP is a Layer 2 proprietary protocol that is default-enabled on all Cisco devices including routers and switches and runs on all LAN and WAN media that support Subnetwork Access Protocol (SNAP).
