Cisco show mac address table ip


  1. How to Track Down a Switch Port – Keller Schroeder.
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To display the information about the MAC address table, use the show mac address-table command. Optional Displays information about the dynamic MAC address table entries only. Optional Specifies the interface. The interface can be either Ethernet or EtherChannel. Optional Specifies the Ethernet interface slot number and port number. The password is not required if there is no password on the candidate switch.

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Enter this command only on the command switch to add a member to or remove a member from the cluster. If a switch is not commanding a cluster, this command displays an error message. You do not need to enter a member number. The command switch selects the next available member number and assigns it to the switch joining the cluster.

You must enter the enable password of the candidate switch for authentication when it joins the cluster. The password is not saved in the running or startup configuration. After a candidate switch becomes a member of the cluster, its password becomes the same as the command-switch password. If a switch does not have a configured host name, the command switch appends a member number to the command-switch host name and assigns it to the member switch.

This example shows how to add a switch as member 2 with MAC address 00E0. This example shows how to add a switch with MAC address 00E0. You can verify the previous command by entering the show cluster members command in user EXEC mode on the command switch. Use the cluster run global configuration command to enable clustering on a switch. Use the no form of this command to disable clustering on a switch. Syntax Description no. When you enter the no cluster run command on a command switch, the command switch is disabled.

Clustering is disabled, and the switch is incapable of becoming a candidate switch. When you enter the no cluster run command on a member switch, it is removed from the cluster. When you enter the no cluster run command on a switch that is not part of a cluster, clustering is disabled on this switch. This switch cannot then become a candidate switch. Use the cluster setup privileged EXEC command on the command switch to automatically build a cluster.

You can use the cluster setup command to add new switches to an existing cluster. The cluster setup command provides a high-level view of the configuration and guides you through the configuration change process.

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You can only see candidate switches that are one hop away from the command switch and that have no IP address. To see devices farther away, use the show cluster members or show cluster candidates command. You can verify your settings by entering the show cluster user EXEC command.

Related Commands Command Description cluster enable. Enables a switch as the cluster command switch, assigns a cluster name, and optionally assigns a member number to it. Use the cluster standby-group global configuration command to enable command switch redundancy by binding the Hot Standby Router Protocol HSRP standby group to the cluster.

Find Mac Address Of Device On Cisco Switch Port

Use the no form of this command to unbind the cluster from the HSRP standby group. Name of the HSRP group that is bound to the cluster. The group name is limited to 32 characters. You must enter this command only on the command switch. If you enter it on a member switch, an error message appears.

The command switch propagates the cluster-HSRP binding information to all members. This example shows the error message when this command is entered on a command switch and the specified HSRP standby group does not exist:. Related Commands Command Description standby ip. Use the cluster timer global configuration command on the command switch to set the interval in seconds between heartbeat messages. Use the no form of this command to set the interval to the default value.

Syntax Description interval-in-secs. Use this command with the cluster holdtime global configuration command only on the command switch.

The holdtime is typically set as a multiple of the heartbeat interval timer cluster timer. For example, it takes holdtime-in-secs divided by the interval-in-secs number of heartbeat messages to be missed in a row to declare a switch down.

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This example shows how to change the heartbeat interval timer and the duration on the command switch. Syntax Description device :. Device containing the file to be deleted. To access the ATM module, specify the slot number 1 or 2. You can verify that the file was removed by entering the show flash : user EXEC command. Related Commands Command Description copy tftp. Use the duplex interface configuration command to specify the duplex mode of operation for Fast Ethernet and Gigabit Ethernet ports.

Use the no form of this command to return the port to its default value. Syntax Description full. Certain ports can be configured as either full duplex or half duplex. Applicability of this command depends on the device to which the switch is attached. For Fast Ethernet ports, setting the port to auto has the same effect as specifying half if the attached device does not autonegotiate the duplex parameter.

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For Gigabit Ethernet ports, setting the port to auto has the same effect as specifying full if the attached device does not autonegotiate the duplex parameter. If the speed is set to auto, the switch negotiates with the device at the other end of the link for the speed setting and then forces the speed setting to the negotiated value. The duplex setting remains as configured on each end of the link, which could result in a duplex setting mismatch. This example shows how to set port 1 on a Fast Ethernet module installed in slot 2 to full duplex:. This example shows how to set port 1 on a Gigabit Ethernet module installed in slot 2 to full duplex:.

The exit command implements all the configuration changes that you made since you entered VLAN database mode and uses them for the running configuration. This command returns you to privileged EXEC mode. Related Commands Command Description abort. Use the flowcontrol interface configuration command on Gigabit Ethernet ports to control traffic rates during congestion.

How to Track Down a Switch Port – Keller Schroeder

Use the no form of this command to disable flow control on the port. Syntax Description asymmetric.

Enable the local port to perform flow control of the remote port. If the local port is congested, it can request the remote port to stop transmitting. The local port requests that the remote port begin transmitting after the congestion clears. Enable the local port to perform flow control only if the remote port can also perform flow control of the local port. If the remote port cannot perform flow control, the local port also does not. This example shows how to configure the local port to support any level of flow control by the remote port:.