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9-6
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
OL-23435-03
Chapter 9 Configuring Q-in-Q VLAN Tunnels
Information About Layer 2 Protocol Tunneling
Figure 9-4 Layer 2 Protocol Tunneling
In the preceding example, STP for a VLAN on a switch in Customer X, Site 1 will build a spanning tree
on the switches at that site without considering convergence parameters based on Customer X’s switch
in Site 2.
Figure 9-5 shows the resulting topology on the customer’s network when BPDU tunneling is not
enabled.
Figure 9-5 Virtual Network Topology Without BPDU Tunneling
Cu st o m er X Si t e 1
VLANs 1 to 100
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Customer A
virtual network
VLANs 1 to 100
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