command to find mac address on cisco switch from neighbors

However, unless the device has all interfaces facing the Internet, there is no real need to disable CDP across the entire platform. CDP contains juicy information regarding hostname, management IP, local and remote interfaces, IOS version, platform and VTP domain. You can also disable CDP by using “no cdp enable” command.īy default, most people leave CDP running. To enable CDP on a specific interface, use “cdp enable” command on the interface configuration mode. To enable CDP globally, use “cdp run” on the router configuration mode.

This command output indicates that CDP is enabled on the device, but no neighbor devices are discovered or connected to this device. You can verify whether CDP is enabled or disabled on your Cisco device using the show cdp neighbors command. The main purpose of STP is to ensure that you do not create loops when you have redundant paths in your network. Spanning Tree Protocol (STP) is a Layer 2 protocol that runs on bridges and switches. This allows non-Cisco devices to advertise information about themselves to our network devices. Cisco devices support the IEEE 802.1ab version of LLDP. The big difference between the two is that LLDP is a standard while CDP is a Cisco proprietary protocol.

LLDP is a layer two discovery protocol, similar to Cisco’s CDP. What is the difference between LLDP and CDP? CDP message is sent every 60 seconds on interfaces. CDP exchanges hardware and software device information with its directly connected devices. CDP automatically discovers neighboring Cisco devices running CDP, regardless of which protocol or suites are running. When a Cisco device boots up, CDP starts up by default.

Command to find mac address on cisco switch from neighbors