What is QinQ Cisco?
QinQ or QnQ is short for 802.1Q-in-802.1Q. QinQ 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.
What is QinQ in VLAN?
Q-in-Q, also known as 802.1ad, is a protocol commonly used by network service providers (NSPs) to provide more Layer 2 flexibility. Q-in-Q allows multiple VLAN tags to be inserted into a single Ethernet frame.
What is Q-in-Q tunnel?
802.1Q tunneling (aka Q-in-Q) is a technique often used by Metro Ethernet providers as a layer 2 VPN for customers. By using a different VLAN tag for each customer we can separate the traffic from different customers and also transparently transfer it throughout the service provider network.
What is the difference between VLAN and VxLAN?
VxLAN vs. VLAN. The main difference is that VLAN uses the tag on the layer 2 frame for encapsulation and can scale up to 4000 VLANs. VXLAN, on the other hand, encapsulates the MAC in UDP and is capable of scaling up to 16 million VxLAN segments.
What is the purpose of trunking?
The main purpose of trunking is to carry traffic between switches and maintain the VLAN information. Unlike an access link, the trunk link does not belong to a single VLAN but instead can carry traffic from several VLANs over a point-to-point link between two devices that understand the protocol.
What is VXLAN BGP EVPN?
MP-BGP EVPN is a control protocol for VXLAN based on IETF RFC 7342. In this model, end-host information learning and VTEP discovery are both data-plane based, with no control protocol to distribute end-host reachability information among VTEPs.
Why do we need QinQ in Cisco switches?
QinQ 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. For more information about QinQ, see http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/dot1qtnl.html.
Why do we need QinQ in 802.1Q?
The original 802.1Q specification allows a single VLAN header to be inserted into an Ethernet frame. QinQ 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.
What does Q-in-Q tunneling in Cisco mean?
Q-in-Q Tunneling is to allow service providers or hosting provider or data center, 4096 VLAN inside of each one of 4096 VLAN. This is really useful and easy to implement. Before going to the configuration part, let’s discuss the benefits of q-in-q tunnel.
Is there support for QinQ in ISR G2?
This feature provides Layer 2 Tunneling support for QinQ and Layer 2 Protocol Tunneling (L2PT) on Integrated Services Router Generation 2 (ISR G2). User interface will be aligned with the service provider module or switch to support QinQ and L2PT on ISR G2 Layer 2 Port.