BigIron RX Series Configuration Guide 34353-1001810-01SuperSpan™ 12Customer and SP use single STPFigure 39 shows an example of SuperSpan where the customer network and SP both use SingleSTP.FIGURE 39 Customer and SP using single STPIn this setup, both the customer and SP networks are running a single spanning tree at Layer 2.The traffic from VLAN 10 and 20 will be carried, or aggregated by VLAN 100 at the SP network as inthe previous scenario. Loop-free, non-blocking topology is still separately maintained by thecustomer's single spanning tree and the SP's single spanning tree.Configuring SuperSpanTo configure a device for SuperSpan:• Configure each interface on the device that is connected to customer equipment as aboundary interface. This step enables the interface to convert the destination MAC address inthe customer's BPDUs.The software requires you to specify a SuperSpan customer ID when configuring the boundaryinterface. Use an ID from 1 – 65535. The customer ID uniquely identifies the customer. Usethe same customer ID for each SP interface with the same customer. When tunneling BPDUsthrough the Brocade network, the devices use the customer ID to ensure that BPDUs areforwarded only to the customer's devices, and not to other customers' devices.• Globally enable SuperSpan. This step enables the Preforwarding state.Configuring a boundary interfaceTo configure the boundary interfaces on SP 1 in , enter the following commands.BigIron RX(config)# interface 1/1BigIron RX(config-if-e1000-1/1)# stp-boundary 1BigIron RX(config)# interface 1/2BigIron RX(config-if-e1000-1/2)# stp-boundary 2tagged to multiple vlanstp-boundaryuntagged to vlan 100 (Super Aggregated VLAN)CustomerRegion ProviderRegionRoot bridge for VLAN xx1/12/12/23/12/12/2RRR xxsinglespansinglespan
