How do I add a VLAN in Spanning Tree?
Suppose you want to enable the IEEE 802.1D STP across VLAN 3. To do so, use the following method….Enable spanning tree on a VLAN
- Access the global CONFIG level of the CLI on Device-A by entering the following commands.
- Access the level of the CLI for configuring port-based VLAN 3 by entering the following command.
What is the command to create a VLAN on a Cisco switch?
Adding a VLAN Directly and Entering into VLAN Configuration Mode
| Step | Actions | Commands |
|---|---|---|
| 1 | Enter global configuration mode. | switch#configure terminal |
| 2 | Enter VLAN configuration mode and/or create a VLAN. | switch(config)#vlan vlan-id |
| 3 | Configure a name for the VLAN. | switch(config-vlan)#name name |
How do you trunk a VLAN?
To enable trunk links, configure the ports on either end of the physical link with parallel sets of commands. To configure a switch port on one end of a trunk link, use the switchport mode trunk command. With this command, the interface changes to permanent trunking mode.
How do you set a spanning tree root?
To configure a Switch to become the Spanning Tree Protocol (STP) Root Bridge (Root Switch) for a VLAN, you can use the “spanning-tree vlan root” command from the Global Configuration Mode.
What are VLANs and how can they be configured?
VLANs (Virtual LANs) are logical grouping of devices in the same broadcast domain. VLANs are usually configured on switches by placing some interfaces into one broadcast domain and some interfaces into another. Each VLAN acts as a subgroup of the switch ports in an Ethernet LAN.
What is spanning tree protocol?
Spanning Tree Protocol (STP) is a Layer 2 network protocol used to prevent looping within a network topology. STP was created to avoid the problems that arise when computers exchange data on a local area network (LAN) that contains redundant paths.
What is spanning tree vlan?
Spanning Tree Protocol (STP) prevents loops in networks and VLAN (Virtual Local Area Network) is used to create many virtual Local Area Networks. There are certain situations where you need redundant links but not loops. Redundant links are helpful in networks as backups in failover cases.
How do I enable spanning tree?
To enable or disable Spanning Tree Protocol (STP) or Rapid Spanning Tree Protocol (RSTP) in the Insight mobile app:
- Launch the Insight mobile app.
- Tap Networks in the menu at the bottom.
- At the top, select the network location for which you want to enable or disable STP.
- Select Wired Settings > Spanning Tree (STP).
Why do we configure VLANs?
VLANs reduce the incidence of collisions and decrease the number of network resources wasted by acting as LAN segments. Data packets sent from a workstation in a segment are transferred by a bridge or switch, which will not forward collisions but will send on broadcasts to every network devices.
What is Switchport trunk?
switchport mode trunk: Puts the interface into permanent trunking mode and negotiates to convert the neighboring link into a trunk link. The interface becomes a trunk interface even if the neighboring interface is not a trunk interface.
How to configure VLANs in Cisco switch?
Use the enable command to enter the privilege mode. Use the configure terminal command to enter the configuration mode. Create a new vlan, select an identification number and add a brief description. Access the interface configuration mode and associate the port with a Vlan. In our example, the Switch port 40 was configured as a member of VLAN 100.
How do I create a VLAN in Linux terminal?
Use the configure terminal command to enter the configuration mode. Create a new vlan, select an identification number and add a brief description. Access the interface configuration mode and associate the port with a Vlan. In our example, the Switch port 40 was configured as a member of VLAN 100.
What is the native VLAN and how do I set it?
The Native VLAN is the one VLAN on a trunk port which is allowed to remain untagged. By default, this is set to VLAN 1, but this can be changed by an administrator. After setting this command, any time SwitchX is sending traffic on VLAN 2 out the trunk port Eth1/1, it will do so without adding a VLAN tag.
How to configure VTP in Cisco switch?
To configure VTP, you need to specify one switch as VTP SERVER and all other switches as VTP CLIENT. Then, you configure VLANs onlyon the VTP SERVER switch, and all these VLANs are propagated and appear also on the Client switches.