Command	Description
	configure terminal	Enters the global configuration mode
	copy running-config bootflash:	Copies the running-configuration to bootflash
	copy running-config startup-config	Copies the running-configuration to startup-config(i.e. saves the configuration to NVRAM)
	copy running-config tftp:	Copies the running-configuration to TFTP server
	copy tftp bootflash:	Initiates a macro to copy a software image from from a TFTP server to bootflash
	copy tftp disk0:	Initiates a macro to copy a software image from from a TFTP server to an ATA disk in disk0
	copy tftp slot0:	Initiates a macro to copy a software image from from a TFTP server to the PCMCIA card in slot0
	delete flash-device:filename	Deletes an image on the device
	format flash-device:filename	Formats a device for use on the current system;all data on the device is deleted during format
	(config-if)#ip address ipaddr subnet-mask	Configures the ip address and subnet mask of an interface
	(config-if)#ip default-gateway ip-address	Configures a Layer 2 -only switch or Layer 3 switch with IP routing disabled for a default gateway
	no debug all	Immediately disables all enabled debugs
	show arp	Displays the ARP table contents
	show hardware	Displays hardware information (similar to the show version command)
	show interface	Displays all interfaces with statistics
	show ip interface brief	Displays, in brief output, all interfaces on the system with an IP address and state
	show ip route	Displays the IP routing table
	show running-config	Displays the running-configuration
	show version	Displays the software version, uptime and so on
	squeeze flash-device:filename	Removes deleted files on the device and recovers file system space
	(config-if)#[no] shutdown	Administratively shuts down an interface
	(config-if)#[no] switchport	Configures an interface as a Layer2 interface
	terminal monitor	Configures the virtual terminal to monitor system messages
	archive download-sw /overwrite source-url	Automates software upgrade procedure on Catalyst 2950 and 3550 family of switches
	boot system filesystem:filename	Configures the system boot image
	clock set hh:mm:ss month day year	Configures the clock date and time
	clock summer-time zone recurring [week day month hh:mm week day month hh:mm [offset]]	Configures recurring time adjustments, such as daylight savings time
	clock timezone zone hours-offset	Configures the time zone in offset from UTC
	dir flash:	Displays the contents of the flash
	enable	Enters the privilige mode
	end	Configuration EXEC command to end the configuration mode
	exit	Ends the current configuration mode leaf
	hostname	Configures switch with a descriptive name
	interface Fastethernet | GigabitEthernet interface	Enters the interface configuration mode
	interface vlan vlan-id	Enters the VLAN configuration interface mode
	ip domain-lookup	Enables domain name lookup via DNS
	ip domain-name domain-name	Configures the Internet domain suffix for the switch name
	ip name-server ip-address	Configures the domain name servers(DNS)
	logging ip-addr	Configures the system that is logging the server destination IP address
	ntp-server ip-addr	Configures the NTP server address
	no shutdown	Configures the interface in the administrative UP state
	ping ip-addr	sends ICMP echoes to a specific destination
	reload	soft reboots the switch
	show logging	Displays the syslog messages on a switch
	show processes cpu	Displays the processor utilization information
	show clock	Displays the current time and date
	show ntp associations	Displays NTP associations
	switchport access vlan vlan-id	Configures an interface for a specific VLAN ID
	transport input	Configures the virtual terminal for allowable protocols
	vlan vlan-id	Adds or removes a VLAN ID in the VLAN database
	write erase	Erases the startup-config
	show vlan	Displays detailed information of all the VLANs configured on the switch
	show vlan brief	Displays brief information about the VLANs on the switch.This command describes the VLAN names, their  status, and the ports assigned to the VLANs.
	show vtp status	Provides information about aparticular VLAN by VLAN-ID
	show vlan vlan-id	Displays information about a particular VLAN by VLAN-ID
	show vlan summary	Displays a summary of active, suspended and extended VLAN's.This command is only available on Cisco CatOS
	show interface type slot/port switchport	Displays administrative and operational status of a switching interface, which includes VLAN information,pVLAN status, etc.
	show interface type slot/port trunkport	Displays a trunk information of an interface
	(config-if)#description description	Configures an interface with a description.This option is useful for quickly identifying interfaces.
	(config-if)#switchport host	This command enables Spanning-Tree Portfast and turns off channelling on an interface.This command prevents timeouts on boot for host workstations and servers.
	(config)#interface type slot/port	Configures and interface
	(config-if)#switchport mode access	Configures an interface with nontrunking single VLAN interface
	(config-if)#switchport access vlan vlan-id	Configures an interface to a VLAN-ID
	(config-if)#switchport mode trunk	Configures an interface for trunking unconditionally
	(config-if)#switchport trunk encapsulation [dot1q | isl | negotiate]	Configures the trunking protocol on an a trunk interface
	(config-if)#switchport trunk allowed vlan options	Configures VLANs allowed to pass traffic on a trunk interface
	(config-if)#switchport trunk native vlan vlan-id	Configures the native VLAN on a trunk interface
	(config)#interface range Fast Ethernet | Gigabit Ethernet  slot/starting _port - ending_port	Moves a range of interfaces into the interface configuaration mode for applying the same configuration to the range of interfaces
	name vlan-name	Specifies a name for a VLAN in either the VLAN database or VLAN configuration mode
	no interface vlan vlan-id type	Disables a VLAN interface
	private-vlan [primary | isolated | community ]	Configures a VLAN as a pVLAN type
	private-vlan association {secondary_vlan_list | add secondary_vlan_list remove secondary_vlan_list}	Associates a secondary pVLAN to a primary pVLAN
	private-vlan-mapping {secondary_vlan_list | add secondary_vlan_list | remove secondary_vlan_list}	Maps the secondary pVLAN to the Layer 3 primary VLAN interface for routing
	show vlan private-vlan	Displays the pVLAN configuration
	switchport mode private-vlan {host | promiscous}	Configures an interface as a pVLAN host port or a promiscous port
	switchport nonegotiate	Turns off  DTP negotiation
	switchport private-vlan host-association primary_vlan_ID secondary _vlan_ID	Associates a Layer 2 interface with a pVLAN
	switchport trunk allowed vlan [remove] vlan-list	Configures a list of VLANs allowed on the trunk
	telnet ip-address	Starts a terminal-emulation program that permits you to access network devices remotely over the network
	vlan database	Enters VLAN configuration configuration mode
	vtp domain domain-name	Sets the VTP domain name in either the VLAN database or configuration mode
	vtp mode {client | server | transperent }	Sets the VTP mode
	show spanning-tree	Displays STP information for all VLANs configured on a switch
	show spanning-tree active	Displays STP information regarding active interfaces for all VLANs
	show spanning-tree interface interface-id	Displays STP information regarding the specified interface
	show spanning-tree statistics mod/port vlan-id	Displays STP statistical information for the specified port and specified VLAN on catalyst switches running Cisco CatOS
	show spanning-tree summary	Displays STP summary information for each VLAN configured on a switch
	show spanning-tree summary totals	Displays STP summary information for all VLANs configured on a switch
	show spanning-tree detail	Displays detailed STP information for all VLANs configured on a switch
	show spanning-tree vlan vlan-id bridge	Displays STP bridge information for a specified VLAN
	show spanning-tree root	Displays the STP root information for all VLANs configured on a switch
	show spanning-tree vlan vlan-id	Displays STP information for a specific VLAN
	(config)#spanning-tree vlan vlan-id root primary	Configures the switch as the root of the specified VLAN by automatically lowering its priority to a value lower than the current root
	(config)#spanning-tree vlan vlan-id priority value	Configures the bridge priority for the specified VLAN
	show spanning-tree vlan vlan-id detail	Displays detailed STP information for a specific VLAN
	(config)#spanning-tree vlan vlan-id cost cost	Configures spanning tree port cost for a VLAN
	show running-config interface interface-id	Displays running config of a specific interface
	show spanning-tree backbonefast	Displays STP BackboneFast status and statistics
	show spanning-tree interface interface-id portfast	Displays STP Portfast status for the specified interface
	show spanning-tree uplinkfast	Displays STP uplinkfast status and details
	spanning-tree backbonefast	Configures STP BackboneFast on the switch
	spanning-tree guard root	Configures STP Root Guard on an interface
	spanning-tree uplinkfast	Configures STP UplinkFast on a switch
	show catalyst6000 traffic-meter	Displays backplane utilization on a catalyst 6500 switch
	show interface interface-id counters errors	Displays error counters for the specific interface
	show udld interface-id	Displays UDLD status and neighbour information for an interface
	(config)#errdisable detect cause [all | arp-inspection | dhcp-rate-limit | dtp-flap | gbic-invalid | l2ptguard | link-flap | pagp-flap ]	Configures error-disable feature detection causes
	(config-if)#channel-group group-number mode {active |auto | desirable | on | passive }	Configures the interface to be part of a EtherChannel group in the specified mode of operation
	(config-if)#udld port aggressive	Configures agessive mode UDLD on the interface regardless of global default
	errdisable recovery cause { all | arp-inspection | bpduguard | channel-misconfig | dhcp-rate-limit | dtp-flap | gbic-invalid | l2ptgaurd | link-flap | pagp-flap | pesecure-vioalation | security-violation | storm-control | udld | unicastflood | vmps }	Configures error-disable feature recovery  causes
	show cdp neighbour	Displays information about neighbouring devices discovered via CDP
	show cdp neighbour detail	Displays detailed information about neighbouring devices discovered via CDP
	show etherchannel summary	Displays a one-line summary for each EtherChannel group
	show interfaces port-channel { port-channel-interface-number }	Displays the status and ststistics information regarding the specified EtherChannel interface