What is the encapsulation dot1q command?
The switchport trunk encapsulation dot1q command tells the switch that the interface should use IEEE 802.1Q encapsulation on the frames when the interface is configured as a trunk. Basically 802.1Q inserts a VLAN tag on the frames. This contrasts with ISL that actually encapsulates the frames with an ISL frame.
What is encapsulation dot1q router?
Router(config-subif)# encapsulation dot1q 1. Enables IEEE 802.1Q encapsulation of traffic on a specified subinterface in VLANs, and defaults the associated VLAN as a native VLAN. Step 3. Router(config-subif)# bridge-group bridge-group. Assigns each network interface to a bridge group.
What is encapsulation dot1q in Packet Tracer?
IEEE 802.1Q encapsulation is configurable on Ethernet and EtherChannel interfaces. IEEE 802.1Q is a standard protocol for interconnecting multiple switches and routers and for defining VLAN topologies. Use the encapsulation dot1q command in subinterface range configuration mode to apply a VLAN ID to the subinterface.
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 is native VLAN?
A native VLAN is a special VLAN whose traffic traverses on the 802.1Q trunk without any VLAN tag. A native VLAN is defined in 802.1Q (it supports untagged traffic while inter-switch link doesn’t support untagged traffic.)
What is dot1q protocol?
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 Dot1Q in CCNA?
What is VLAN encapsulation?
What is VLAN encapsulation? When a switch port is configured to function as a trunk port, it adds unique identification tags – either 802.1Q tags or Inter-Switch Link (ISL) tags to the frames as they move between switches.
What is 802.1Q trunking used for?
VLAN Trunking (802.1Q) allows physical network interfaces in a computing environment to be shared, or multi-homed.
What is 802.1Q encapsulation briefly explain the purpose of the following command encapsulation dot1q?
The encapsulation dot1q command is used to configure Q-in-Q termination on a subinterface. The command accepts an Outer VLAN ID and one or more Inner VLAN IDs. The outer VLAN ID always has a specific value, while inner VLAN ID can either be a specific value or a range of values.
What happens if you apply this command VLAN dot1Q tag native?
The global command “vlan dot1Q tag native” is a common command found on ciscos devices which makes the native vlan on trunk ports require a tag or its dropped (essentially drops all untagged traffic on trunk ports).
Should you tag native VLAN?
It is a best practice to explicitly tag the native VLAN in order to prevent against crafted 802.1Q double-tagged packets from traversing VLANs. In many enterprise networks VLANs are used to separate the network into logically separated networks.
Why do we use encapsulation Dot1q?
IEEE802.1Q, often referred to as DOT1Q or 1Q, is the networking standard that supports virtual LANs (VLANs) on an IEEE 802.3 Ethernet network. It is the most widely used encapsulation method for VLAN tagging.
What is Dot1q protocol?
What is VLAN DOT1Q tag native?
What is encapsulation Dot1q use?
Encapsulation Dot1Q Use Allows you to use a router interface as a trunk port to a switch. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. Syntax Router(config-subif)# Option
What is Dot1q Dot1q in Cisco switch?
Encapsulation Dot1Q. Use. Allows you to use a router interface as a trunk port to a switch. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. Syntax. Router(config-subif)#encapsulation dot1Q Option
What is Dot1q command in command prompt?
Command. Encapsulation Dot1Q. Use. Allows you to use a router interface as a trunk port to a switch. This is also known as “Router on a stick” because the switch uses the router to route between VLANs. Syntax. Router(config-subif)#encapsulation dot1Q Option
Is Dot1q trunking enabled on SW3?
Next, dot1q trunking is enabled on fa0/2 on SW3. Here is the trunking information after making the changes.