IEEE 802.1Q tunneling can be used to achieve simple layer 2 VPN connectivity between sites by encapsulating one 802.1Q trunk inside another. 802.1Q tunneling also called QinQ Business customers of service providers often have specific requirements …

Catalyst 6500 Release 12.2SX Software Configuration Guide Nov 17, 2013 Catalyst 3750-X and 3560-X Switch Software Configuration Sep 11, 2018 Q-in-Q sample config - Cisco Community

Cisco Metro 3750 Layer 2 VPN Employing Improved 80 | Just

Configuring IEEE 802.1Q Tunneling - Cisco

802.1Q: This is the most common trunking protocol. It’s a standard and supported by many vendors. ISL: This is the Cisco trunking protocol. Not all switches support it. Let’s take a look at 802.1Q: Here’s an example of an 802.1Q Ethernet frame.

802.1Q (Q-in-Q) BPDU tunneling 802.1Q (Q-in-Q) BPDU tunneling The service provider can give the customers an infrastructure to run various Layer 2 protocols and connect to all geographically-separated sites. In Q-in-Q BPDU tunneling, a customer packet transferred through the service provider network is tagged twice (except for untagged customer traffic which has only one MACSec possible with IEEE 802.1Q Tunnel - Cisco Community MACSec possible with IEEE 802.1Q Tunneling ? That Nexus is only capable of tunneling CDS, STP and VTP. EoMPLS tunnels all (e.g. 802.1x) without modification to the destination mac-address. Cisco Metro 3750 Layer 2 VPN Employing Improved 80 | Just