How do I remove a subinterface from my router?
The only way to get rid of the deleted sub-interfaces is to reload the router. If specifying the interface type on the command line when you recreate it doesn’t work, a reload of the router should fix it.
How do I remove a vlan from my router?
To remove VLANs from a physical port, complete the following steps. From global configuration mode, enter interface Ethernet configuration mode. Enter the remove-vlan all command to remove all VLANs from the Ethernet port. Enter the remove-vlan vlan command to remove the VLANs from the Ethernet port.
What is subinterface in vlan?
A dot1q VLAN subinterface is a virtual Cisco IOS interface that is associated with a VLAN ID on a routed physical interface. A parent interface is a physical port. Subinterfaces can be created only on Layer 3 physical interfaces.
How do you clear the interface on a Cisco router?
To remove a logical interface, type in “no interface gig0/1.1” as you have noted above. I think the problem why it may not work for you is because you may have typed that command why you were in the interface of gig0/1.
How do I remove an interface from a VLAN?
To remove VLANs from a physical port, complete the following steps. From global configuration mode, enter interface Ethernet configuration mode. Enter the vlan-config remove all command to remove all VLANs from the Ethernet port. Enter the vlan-config remove all command to remove the VLANs from the Ethernet port.
What is subinterface in networking?
A subinterface is a virtual interface created by dividing one physical interface into multiple logical interfaces. A sub-interface in a Cisco Router uses the parent physical interface for sending and receiving data. Subinterfaces are used for a variety of purposes.
How do I delete all VLANs?
To delete the vlan database on a Cisco switch, simply go to the privilege mode and issue the command #delete vlan. dat, reload the switch and all your vlans will be gone.
How do I remove a vlan 1 IP address?
By default the N1100/N1500/N2000/N2100-ON switches tries to get IP address from DHCP in VLAN 1.
…
| Command | Parameters |
|---|---|
| console(config-if-vlan1)#no ip address | Remove IP and sets the IP address configuration method to the default |
| console(config-if-vlan1)#ip address none | Sets the IP address configuration method to none |
What is a subinterface on a router?
A subinterface is a virtual interface created by dividing one physical interface into multiple logical interfaces. A sub-interface in a Cisco Router uses the parent physical interface for sending and receiving data.
How do you assign a subinterface to a VLAN?
To assign a VLAN ID to a subinterface (or to modify the VLAN ID that is currently assigned to a subinterface), use the dot1q vlan command in subinterface configuration mode. To remove the VLAN ID assigned to a subinterface, use the no form of this command.
How do I delete a VLAN on a Cisco switch?
Procedure
- To view all VLANs, type: show vlan.
- To enter configuration mode, type: configure terminal.
- To enter VLAN configuration mode, type: vlan vlan_id.
- To delete the specified VLAN, type: no vlan vlan_id.
How do I delete a Cisco command?
You can delete a command by simply typing “no hostname”.
Which command would you use to delete a vlan?
You use the vlan delete command to delete the VLANs on an interface. You can delete either a specific VLAN or all VLANs associated with that interface. If all VLANs for an interface are deleted, the interface is available to be configured as a regular physical interface.
Why do we create subinterface in router?
How do I add a subinterface to my router?
To assign a VLAN ID to a subinterface (or to modify the VLAN ID that is currently assigned to a subinterface), use the dot1q vlan command in subinterface configuration mode. To remove the VLAN ID assigned to a subinterface, use the no form of this command. Effective with Cisco IOS XR Release 3.7.
Which command would you use to delete a VLAN?
Why were these VLANs not removed?
Why were these VLANs not removed? Because these VLANs are stored in a file that is called vlan. dat that is located in flash memory, this file must be manually deleted.
How do I delete a Cisco vlan?
Remove the VLAN by performing one of the following steps:
- To delete the VLAN temporarily, use the -t option as follows: # dladm delete-vlan -t vlan.
- To make the deletion persist, perform the following: Remove the VLAN. # dladm delete-vlan vlan. Remove the /etc/hostname. vlan-interface file.
What is Switchport mode dot1q tunnel?
The switchport mode dot1q-tunnel command tells the switch to tag the traffic and switchport access vlan command is required to specify the Q-in-Q VLAN of 123.
How do I erase a Cisco switch configuration?
Hold the “mode” button on the front of the switch for 10 seconds. The lights will blink then go solid – the switch completely wipes all configuration and then reboots.
What command deletes the vlan file stored in the switches?
Does router have VLAN?
Routers use subinterfaces as the means to have an interface connected to a VLAN. The router needs to have an IP address/mask associated with each VLAN on the trunk. However, the router has only one physical interface for the link connected to the trunk.
What are the 3 types of VLANs?
Virtual LAN (VLAN) is created on Layer 2 switch to reduce the size of broadcast domain.
There are 5 main types of VLANs depending on the type of the network they carry:
- Default VLAN –
- Data VLAN –
- Voice VLAN –
- Management VLAN –
- Native VLAN –
What are three techniques for mitigating VLAN attacks?
Mitigating a VLAN attack can be done by disabling Dynamic Trunking Protocol (DTP), manually setting ports to trunking mode, and by setting the native VLAN of trunk links to VLANs not in use.
What is dot1q tunneling?
802.1Q tunneling enables service providers to use a single VLAN to support customers who have multiple VLANs, while preserving customer VLAN IDs and keeping traffic in different customer VLANs segregated. A port configured to support 802.1Q tunneling is called a tunnel port.