Cisco N7K-C7010 Configuration Guide - Page 277

Send document comments to [email protected] 9 C H A P T E R Configuring Q-in-Q VLAN Tunnels This chapter describes how to configure IEEE 802.1Q-in-Q (Q-in-Q) VLAN tunnels and Layer 2 protocol tunneling on Cisco NX-OS devices. This chapter includes the following sections: • Information About Q-in-Q Tunnels, page 9-1 • Information About Layer 2 Protocol Tunneling, page 9-4 • Licensing Requirements for Q-in-Q Tunnels, page 9-7 • Guidelines and Limitations, page 9-7 • Configuring Q-in-Q Tunnels and Layer 2 Protocol Tunneling, page 9-7 • Verifying the Q-in-Q Configuration, page 9-16 • Configuration Examples for Q-in-Q and Layer 2 Protocol Tunneling, page 9-16 • Feature History for Q-in-Q Tunnels and Layer 2 Protocol Tunneling, page 9-17 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. This section includes the following topics: • Q-in-Q Tunneling, page 9-1 • Native VLAN Hazard, page 9-3 Q-in-Q Tunneling Business customers of service providers often have specific requirements for VLAN IDs and the number of VLANs to be supported. The VLAN ranges required by different customers in the same service-provider network might overlap, and traffic of customers through the infrastructure might be mixed. Assigning a unique range of VLAN IDs to each customer would restrict customer configurations and could easily exceed the VLAN limit of 4096 of the 802.1Q specification. OL-23435-03 Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x 9-1