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Details

Switching and STP Commands
Switch-level admin commands
19
Computer Networking
Professional
09/02/2015

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Cards

Term
Displays the cache table of learned hardware addresses.
Definition
#show mac address-table
Term
Enters VLAN configuration mode to configure parameters such as the IP address and mask.
Definition
(config)#interface vlan <#>
Term
Configure an IP address for a VLAN (2 steps).
Definition
1.(config)#int vlan <#>
2.(config-if)#ip address A.B.C.D M.M.M.M
Term
Configures a default gateway on a switch.
Definition
(config)#ip default-gateway
Term
Configures access control of a switch port; by itself places a port into default security mode of "err disable".
Definition
(config-if)#switchport port-security
Term
Configures a statically assigned secure hardware address for a given ports table.
Definition
(config-if)#switchport port-security mac-address [sticky | mac_addr]
Term
Configures a max number of secure addresses for a given switchport.
Definition
(config-if)#switchport port-security maximum <max #>
Term
Configures an action the switch will take should a violation on a port occur.
Definition
(config-if)#switchport port-security violation [protect|restrict|shutdown]
Term
Configures Spanning-Tree Protocol options
Definition
(config)#spanning-tree
Term
Configures a switch VLAN to have a specific STP priority.
Definition
(config)#spanning-tree vlan <#> priority <priority>
Term
Shows the spanning-tree configuration for each VLAN.
Definition
#show spanning-tree
Term
Configures a switch port (or range) to immediately transition to forwarding and not wait for the STP timer.
Definition
(config-if)#spanning-tree portfast
Term
Command to filters BPDUs from entering a switch port.
Definition
(config-if)#spanning-tree bpdufilter
Term
Command to shut down a switch port if it receives a BPDU.
Definition
(config-if)#spanning-tree bpduguard
Term
Configures the spanning tree mode on a single interface or range and sets the mode.
Definition
(config-if)#spanning-tree mode [MST|PVST|rapid-pvst]
Term
Enters configuration mode forĀ a virtual port or interface that will serve as the new single-bundled interface.
Definition
(config)#int port-channel <#>
Term
Command to manually set the channel-group to one of two EtherChannel protocols.
Definition
(config-if)# channel-protocol [lacp | pagp]
Term
Sets the switch to be the primary root bridge of the PVST.
Definition
(config)#spanning-tree vlan <#> root primary
Term
Sets the switch to be the secondary root of the PVST.
Definition
(config)#spanning-tree vlan <#> root secondary
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