How do I enable dot1q encapsulation?
How do I enable dot1q encapsulation?
Configuring ROAS
- Use the interface type number.
- Use the encapsulation dot1q vlan_id command in subinterface configuration mode to enable 802.1Q and associate one specific VLAN with the subinterface.
- Use the ip address address mask command in subinterface configuration mode to configure IP settings (address and mask).
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 Switchport encapsulation dot1q?
switchport trunk encapsulation dot1q sets the encapsulation mode of the trunk interface to the industry standard 802.1Q. switchport trunk encapsulation isl sets the encapsulation mode of the trunk interface to proprietary ISL.
What is second dot1q?
Router(config-subif)# encapsulation dot1q 100 second-dot1q 200. (Required) Enables the 802.1Q encapsulation of traffic on a specified subinterface in a VLAN. • Use the second-dot1q keyword and the vlan-id argument to specify the VLAN tags to be terminated on the subinterface.
How do I configure my router port trunk?
In order to form a trunk link with our switch it is necessary to create one sub-interface for every VLAN configured on our switch. After creating the sub-interface, we assign an IP address to it and set the encapsulation type to 802.1q along with the VLAN to which the subinterface belongs.
Is dot1q Cisco proprietary?
ISL is cisco proprietary and presently it is supported only by few high end switches only. Dot1Q is an IEEE’s open standard, which be used to create trunk connection between switches of different vendors.
What is difference between ISL and dot1q?
ISL is cisco proprietary and presently it is supported only by few high end switches only. Dot1Q is an IEEE’s open standard, which be used to create trunk connection between switches of different vendors. In ISL the original ethernet frame is not modified, it is encapsulated between an ISL header and an FCS.
What is ISL and dot1q?
What is ISL and DOT1Q?
What is 802.1Q trunking?
IEEE 802.1Q (sometimes referred to as 1Q or DOT1Q) is a industry standards based implementation of carring traffic for multiple VLANs on a single trunking interface between two Ethernet switches. 802.1Q is for Ethernet networks only. Unlike ISL, 802.1Q does not encapsulate the original Ethernet frame.
Why do you need to configure 802.1Q trunks?
This configuration ensures availability and stability of the VoIP service, especially during peak traffic hours in your network. Packets running between VLANs are routed via the CCME router connected to the switch using one physical port configured as a trunk port on both ends (switch and router).