What is a port-based VLAN?
A port-based VLAN configuration lets you assign ports on the switch to a VLAN. The number of VLANs is limited to the number of ports on the switch. In a basic port-based VLAN configuration, ports with the same VLAN ID are placed into the same VLAN. One port can be a member of multiple VLANs.
For what purpose is 802.1Q VLANs used?
IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual local area networking (VLANs) on an IEEE 802.3 Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames.
What is 802.1Q VLAN configuration?
An 802.1Q-based VLAN configuration lets you assign ports on the switch as tagged or untagged members to a VLAN with an ID number in the range of 1–4094. By default, all ports are untagged members of VLAN 1.
What is 802.1Q and native VLAN modes?
The IEEE 802.1Q trunking protocol describes something called the native VLAN. All native VLAN traffic is untagged; it doesn’t have an 802.1Q tag on the Ethernet frame. When you look at it in Wireshark, it will look the same, just like any standard Ethernet frame.
What are two types of ports for VLANs?
Different Types of Switch Ports
- Access Ports. An access port belongs to and carries the traffic of only one VLAN.
- Trunk Ports. A trunk port carries the traffic of multiple VLANs and by default is a member of all VLANs in the VLAN database.
- Tunnel Ports.
What is the purpose of the 802.1Q protocol?
The 802.1Q tagging protocol allows the Ethernet frame size to increase by four bytes to a range of 68 to 1522 bytes. This size increase is due to the insertion of a four-byte VLAN tag into the frame. The tags, which include a VLAN Identifier (VID), are attached to each Ethernet frame by MAC address.
What is the difference between a tagged and untagged VLAN?
VLAN-enabled ports are generally categorized in one of two ways, tagged or untagged. These may also be referred to as “trunk” or “access” respectively. 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.
What is the difference between native VLAN and default VLAN?
The default VLAN is always VLAN 1, and it can’t be changed. By default, Native VLAN is VLAN 1, but it can be changed to any VLAN. Traffic will be sent when both Default and Native VLAN are the same. Traffic can be sent irrespective of Default and Native VLAN being the same or different.
What is the purpose of the native VLAN in 802.1Q trunking?
What is the Native VLAN? As you remember from the previous lesson, trunk ports send and receive Ethernet frames tagged with IEEE 802.1q VLAN tags . The primary idea behind this is to be able to transport frames from multiple VLANs over a single physical link between switches.
Can a port belong to multiple VLANs?
No, an access port can only be part of one VLAN. The trunk ports on the two switches need to be configured to forward the VLAN 10 packets, then all hosts on all VLAN 10 access ports will be able to communicate.