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What is vlan1?
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 tag and untag in switch?
The purpose of a tagged or “trunked” port is to pass traffic for multiple VLAN’s, whereas an untagged or “access” port accepts traffic for only a single VLAN. Generally speaking, trunk ports will link switches, and access ports will link to end devices.
Why you should never 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 is the purpose of an SVI?
A switch virtual interface (SVI) represents a logical Layer-3 interface on a switch. VLANs divide broadcast domains in a LAN environment. Whenever hosts in one VLAN need to communicate with hosts in another VLAN, the traffic must be routed between them.
How to set up VLANs on a hp v1910?
Hi, I have inherited an AV project with a network with a mix of switches of various types including a couple of HP V1910 JE005A 16P units. I would like to set up some VLANS on the units. At the moment the LAN has 2 subnets assigned for products on the AV system, 192.168.22.x and 23.x, with a subnet mask of 255.255.252.0.
When to use a tag or a VLAN number?
There are basically 2 options for each port / VLAN number combination. TAGGED – If the port is marked as tagged, the VLAN number will be attached to the packet as the packets leave this port. This function should be used when the port is connected to another “VLAN aware device”, like a switch, or router, or Hyper-V physical machines.
What does it mean to tag a port on a hp switch?
In the HP switch configuration guide you will find the following: •Tagged – When a port is tagged, it allows communication among the different VLANs to which it is assigned. •Untagged – When a port is untagged, it can only be a member on one VLAN.
Can a port be an untagged member of a VLAN?
For example, if the switch is configured with the default VLAN plus three protocol-based VLANs that include IPX, then port 1 can be an untagged member of the default VLAN and one of the protocol-based VLANS. Noor Auto No: When the switch is not GVRP-enabled; prevents the port from joining that VLAN.