Category: CCNA Study Guide
Command Vlan Use This is the modern way to configure VLANs. A useful feature of this command is that you can configure a range of VLANs with a single command. Syntax Switch(config)#vlan <vlan range> Options <name> Set VLAN name <exit> Apply changes and leave VLAN configuration mode Example …
Command Spanning-Tree Uplinkfast Use This command allows the switch to quickly select another root port if it detects a failure. The new root port moves from blocking to forwarding in under 5 seconds. Syntax Switch(config)#spanning-tree uplinkfast Example In the below example we will configure SW2 to use uplinkfast. …
Command Spanning-Tree VLAN Root Primary Use This command sets the switch to become root for a given VLAN. It works by lowering the priority of the switch until it becomes root. Once the switch is root, it will not prevent any other switch from becoming root. Syntax Swith(cconfig)#spanning-tree …
Command VTP Pruning Use VTP pruning spares bandwidth and adds to security by paying attention to what switches have interfaces assigned to VLANs. If a switch isn’t using a particular VLAN, the VTP server will block traffic from the VLAN going to that switch. Syntax Swtich(config)#vtp pruning Example …
Command VTP Domain Use This command sets a VTP domain name and enables VTP on a network. If you have full communication between your VTP network, you only need to use this command on the VTP server as other switches will automatically learn the VTP domain from received …
Command VTP Mode Server Use VTP Mode Server allows the switch to make changes to the VLAN database as well as propagate changes to other switches. This is the default mode for VTP Syntax Switch(config)#vtp mode server Example In the below example we will confirm that the switch …
Command Vlan Use This is the modern way to configure VLANs. A useful feature of this command is that you can configure a range of VLANs with a single command. Syntax Switch(config)#vlan <vlan range> Options <name> Set VLAN name <exit> Apply changes and leave VLAN configuration mode Example …
Command VTP Password Use This command secures VTP updates by setting a secure password. Syntax Switch(vlan)#vtp password <password> Example In the below example we will set a password of ‘cisco’ for the VTP domain on SW1. SW1#vlan database % Warning: It is recommended to configure VLAN from config …
Command VTP Server Use This is the legacy way to configure VTP server mode. VTP Server mode allows the switch to make changes to the VLAN database as well as propagate changes to other switches. This is the default mode for VTP Syntax Switch(vlan)#vtp server Example In the …
Command Show Use This is the legacy way to view VLANs configured on a switch. While this mode is being depreciated, you will still encounter it on older switches or routers with switch modules. On newer IOS releases, use the show vlan command. Syntax Switch(vlan)#show OR Switch(vlan)#show <changes or current or …
