What is QinQ Tunnelling?

A Q-in-Q VLAN tunnel enables a service provider to segregate the traffic of different customers in their infrastructure, while still giving the customer a full range of VLANs for their internal use by adding a second 802.1Q tag to an already tagged frame. Q-in-Q Tunneling.

Is QinQ a Layer 2?

802.1Q tunneling (aka Q-in-Q) is a technique often used by Metro Ethernet providers as a layer 2 VPN for customers.

How do I configure QinQ?

To configure the switch, follow these steps:

  1. Enable QinQ: Edge l(config)#: qinq svlan tag-type 88a8.
  2. Reboot the box with the configuration saved to transfer into svlan bridge mode.
  3. Configure S-VLANs and ports connected to the customer network.
  4. Configure the provider ports leading to the core of the provider network.

What is QinQ translation?

Q-in-Q tunneling and VLAN translation allow service providers to create a Layer 2 Ethernet connection between two customer sites. Providers can segregate different customers’ VLAN traffic on a link (for example, if the customers use overlapping VLAN IDs) or bundle different customer VLANs into a single service VLAN.

What is VLAN tunneling?

802.1Q tunneling enables service providers to use a single VLAN to support customers who have multiple VLANs, while preserving customer VLAN IDs and keeping traffic in different customer VLANs segregated. A port configured to support 802.1Q tunneling is called a tunnel port.

What is QINQ translation?

What is 802.1Q tunneling?

802.1Q tunneling enables Service Providers to use a single VLAN to support customers who have multiple VLANs, while preserving customer VLAN IDs and keeping traffic in different customer VLANs segregated. A port configured to support 802.1Q tunneling is called a tunnel port.

What is the difference between 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.