Quickcomputerstips
- Is VLAN 1 the default?
- What is a VLAN 1?
- What is the features of a default VLAN?
- What type of VLAN is VLAN 1?
- Why is VLAN 1 the default VLAN?
- What is the default name of VLAN 1?
- Why is VLAN 1 used?
- What is default VLAN?
- Is VLAN 1 reserved?
- Should VLAN 1 be tagged?
- Why you should not use VLAN 1?
- What VLAN number value is an assigned to the default VLAN?
Is VLAN 1 the default?
The default Ethernet VLAN is VLAN 1. It is a security best practice to configure all the ports on all switches to be associated with VLANs other than VLAN 1. This is usually done by configuring all unused ports to a black hole VLAN that is not used for anything on the network.
What is a VLAN 1?
Vlan 1 is the deafult vlan which is used to send control traffic like VTP,STP,DTP,CDP over the links.It has nothing to do with the native vlan.In earlier IOS versions removing vlan 1 over the trunk wasnot allowed as the control traffic was only bound to vlan1.
What is the features of a default VLAN?
The default VLAN has the following characteristics: It is distinct, non-static/non-dynamic, and all ports are untagged members by default. It cannot be deleted. It cannot be given a label.
What type of VLAN is VLAN 1?
Management VLAN –
VLAN 1 is the management VLAN by default (VLAN 1 would be a bad choice for the management VLAN). Any of a switch VLAN could be define as the management VLAN if admin as not configured a unique VLAN to serve as the management VLAN.
Why is VLAN 1 the default VLAN?
The default VLAN for Cisco switches is VLAN 1. VLAN 1 has all the features of any VLAN, except that you cannot rename it and you cannot delete it. Layer 2 control traffic, such as CDP and spanning tree protocol traffic, will always be associated with VLAN 1 – this cannot be changed.
What is the default name of VLAN 1?
Management VLAN is used for purposes such as telnet, SNMP, and syslog. By default, VLAN 1 is the management VLAN. Ensure that there are no redundant links for the management VLAN.
Why is VLAN 1 used?
VLAN 1 contains control plane traffic and can contain user traffic. It is recommended that user traffic be configured on VLANs other than VLAN 1, primarily to prevent unnecessary user broadcast and multicast traffic from being processed by the Network Management Processor (NMP) of the supervisor.
What is default VLAN?
Typically, the default VLAN refers to the one that all of the ports on a device belong to when it is switched on. On most switches, this default is VLAN 1 and should be changed for security reasons.
Is VLAN 1 reserved?
Furthermore, VLAN 1 is reserved for “untagged traffic,” meaning that any data traffic in a network that does not have a VLAN tag is considered to be on VLAN 1. This is why all switch and access point VLANs are defaulted to VLAN 1.
Should VLAN 1 be tagged?
As VLAN 1 is the default native VLAN, it is used for untagged traffic. If you need to pass frames tagged VLAN 1, you will not be able to, by default. The solution is to change the default VLAN to another value. Once this is done, VLAN 1 can be passed across the trunk just the same as any other VLAN.
Why you should not use VLAN 1?
Even though normal network traffic crossing a trunk link is going to require a VLAN tag in the headers, the switch-to-switch control-plane communication is sent with no header present. ... If we leave the default native VLAN as 1, then a malicious developer could exploit this to gain access to another segment.
What VLAN number value is an assigned to the default VLAN?
A trunk port configured with IEEE 802.1Q tagging can receive both tagged and untagged traffic. By default, the switch forwards untagged traffic in the native VLAN configured for the port. The native VLAN is VLAN 1 by default. The native VLAN can be assigned any VLAN ID.
