Gufosaggio
Can a port be tagged and untagged at the same time?
- A port can be tagged to multiple Vlans at the same time. - A port can't be tagged and untagged to the same Vlan. So if uplink between ProCurve and Cisco, the Native Vlan on Cisco should match the Default_Vlan on ProCurve (default to one).
What is a trunked VLAN?
VLAN trunking enables the movement of traffic to different parts of the network configured as a VLAN. A trunk is a point-to-point link between two network devices that carry more than one VLAN. With VLAN trunking, you can extend your configured VLAN across the entire network. Allora,, what happens when an access port receives a tagged frame? When a frame is sent - it's still untagged when it enters the access port - and remains so until it reaches the TRUNK port. Now, when the trunk port receives the frame, it simply does a lookup of the MAC address in the ethernet switching table and sees what VLAN its associated with and THEN it is tagged.
What is tagged and untagged VLAN in HP switch?
tagged - means that packets that have a valid vlan tag for this vlan id will be accepted on this port. packets without vlan tag will not be accepted. untagged - means that if there is packets on this port that have no vlan id set will have their vlan id tag set to this vlan by the switch. How does VLAN reduce network traffic? VLANs reduce the need to have routers deployed on a network to contain broadcast traffic. Flooding of a packet is limited to the switch ports that belong to a VLAN. Confinement of broadcast domains on a network significantly reduces traffic.
What are the disadvantages of VLAN?
Disadvantages of VLAN A packet can leak from one VLAN to other. An injected packet may lead to a cyber-attack. Threat in a single system may spread a virus through a whole logical network. You require an additional router to control the workload in large networks. You can face problems in interoperability. Do I need a VLAN at home? VLANs can be worth setting up in a home network environment to isolate certain devices, improve network security, and make for a more organized and easier to manage home network setup. They are relatively easy to setup and only require a network switch that supports VLAN tagging.
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