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What is Q and Q tunneling?
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 C VLAN & S VLAN?
A C-VLAN refers to a client-side VLAN, while an S-VLAN refers to a service layer VLAN of operators.
What does QinQ stand for?
That’s because it’s a quality name. A quality name that means “Quality tips.” That’s right, the Q stands for quality.
What is the full form of VLAN?
Virtual local area networks, or VLANs, have become important as network complexity has exceeded the capacity of typical local area networks (LANs). Originally, a LAN connected a group of computers and associated devices to a server via cables in a shared physical location (hence the term “local”).
What is inner VLAN and outer VLAN?
Within an Ethernet Frame, these two tags are often known as “Inner tag” and “Outer tag”. “Inner tags” contain VLAN information that belong to the traffic of the NSP’s customers. The “Outer tags” contains information relating to the NSP’s VLAN networks.
What does Q stand for in medical?
q_h: If a medicine is to be taken every so-many hours, it is written “q_h”; the “q” standing for “quaque” and the “h” indicating the number of hours.
How does the juniper EX3300 Ethernet switch work?
The EX3300 switches fully interoperate with Juniper Networks Unified Access Control, which consolidates all aspects of a user’s identity, device, and location, enabling administrators to enforce access control and security down to the individual port or user levels.
When to use Q-in-Q tunneling in Junos?
Q-in-Q tunneling is useful when customers have overlapping VLAN IDs, because the customer’s 802.1Q (dot1Q) VLAN tags are prepended by the service VLAN (S-VLAN) tag. The Juniper Networks Junos operating system (Junos OS) implementation of Q-in-Q tunneling supports the IEEE 802.1ad standard.
How does Q-in-Q tunneling work on a VLAN?
In Q-in-Q tunneling, as a packet travels from a customer VLAN (C-VLAN) to a service provider’s VLAN, a customer-specific 802.1Q tag is added to the packet. This additional tag is used to segregate traffic into service-provider-defined service VLANs (S-VLANs).
How is the 802.1Q tag used in Q in Q tunneling?
In Q-in-Q tunneling, as a packet travels from a customer VLAN (C-VLAN) to a service provider’s VLAN, a customer-specific 802.1Q tag is added to the packet. This additional tag is used to segregate traffic into service-provider-defined service VLANs (S-VLANs).