What is Cisco Q-in-Q?
What is Cisco Q-in-Q?
Information About Q-in-Q Tunnels 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.
What is Q-in-Q in networking?
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 Q-in-Q used for?
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 the purpose of 802.1 Q?
IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual LANs (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 does QinQ stand for?
QINQ
| Acronym | Definition |
|---|---|
| QINQ | 802.1q in 802.1q Tunneling |
Why is QinQ used?
The general purpose of QinQ is to allow frames from multiple customers to be forwarded (or tunneled) through another topology (provider network) using service VLANs or S-VLANs.
Which is true VTP?
Solution(By Examveda Team) You must set the VTP domain name on all switches to be the same domain name or they will not share the VTP database.
What is 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.
When to configure Q-in-Q tunneling in Cisco-letsconfig?
When q-in-q will be configured, there will no new configuration from the service provider end. Customer need to configure on their end only for future changes. So, data connectivity will look like dark fiber to the customers. Configuration of Q-in-Q tunnelling in Cisco is very simple.
How is Q-in-Q configured on the Cisco edge device?
Q-in-Q should be configured on the customer-facing interface of the service provider’s edge device. If an Ethernet frame ingresses a Cisco Nexus 9000 series switch, the switch cannot encapsulate the frame with two 802.1Q headers within a single forwarding decision.
Why do you need a Q-in-Q VLAN tunnel?
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. This section includes the following topics: Q-in-Q Tunneling, page 9-1
Which is Cisco router supports Q-in-Q VLAN tag termination?
For the emerging broadband Ethernet-based DSLAM market, the Cisco 10000 router supports Q-in-Q encapsulation. With the Ethernet-based DSLAM model shown in Figure 2, customers typically get their own VLAN and all these VLANs are aggregated on a DSLAM.