PVST+ uses 802.1Q single STP BPDUs on VLAN 1 and PVST BPDUs (which have a proprietary format) for other VLANs. In this case, the Cisco device uses devices running 802.1Q as tunnels for PVST (non-802.1Q) traffic. The 802.1Q single STP BPDUs are addressed to …

Apr 03, 2019 CCIE Blog » Blog Archive » 802.1Q Tunnelling (QinQ) IEEE 802.1Q Frame (Cisco, 2006) The last frame in the image above is a QinQ frame. Now you can see why it’s double tagged! A tunnel interface adds another Tag (sometimes referred to as an outer tag) and Etype field. References. Cisco (2006) IEEE 802.1q … Solved: Compare Dot1Q and QinQ with Access and - Cisco Dot1Q is the IEEE standard for tagging ethernet frames. You would typically configure and 802.1Q (Dot1Q) trunk to pass your tagged VLANs. Cisco offers and alternative called ISL trunking. A trunk is typically used to connect switches together. This allows them to pass tagged traffic and it stay "separated" until reaching its L2 or routing destination. GTACKnowledge - What is Q-in-Q or 802.1Q tunneling?

Q-IN-Q VLAN TUNNEL. Solution on How to transport customer’s vlan in an encrypted format. Q-in-Q tunnels mean transporting an 802.1Q frame in another 802.1Q frame, 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

802.1ad is a networking standard that supports Q-in-Q networks by allowing multiple 802.1Q tags in an Ethernet frame. Each interface in a customer network is assigned to a customer-VLAN (c-V LAN). Packets in c-VLANs contain 802.1q tags that switch traffic within the network. c … QinQ: IEEE 802.1Q Tunneling | Router Jockey Apr 19, 2012 CCIE Study Notes: 802.1q Tunnels

Solved: pvst+ and dot1q - Cisco Community

802.1Q Tag: 4000, Internal index: 8, Admin State: Enabled, Origin: Static Description: Dot1q Tunneling status: Enabled Customer VLAN ranges: 1-4094 Protocol: Port Mode, Mac aging time: 300 seconds Number of interfaces: Tagged 1 (Active = 1), Untagged 1 (Active = 1) xe-0/1/0.0*, tagged, trunk ge-0/0/1.0*, untagged, access > show vlans v4000