Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 372)

342 Multi-Service IronWare Switching Configuration Guide
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SuperSpan™
12
Customer and SP use single STP
Figure 62 shows an example of SuperSpan where the customer network and SP both use Single
STP.
FIGURE 62 Customer and SP using Single STP
In 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 in the
previous scenario. Loop-free, non-blocking topology is still separately maintained by the customer's
single spanning tree and the SP's single spanning tree.
Configuring SuperSpan
To configure the Brocade device for SuperSpan:
• Configure each interface on the Brocade device that is connected to customer equipment as a
boundary interface. This step enables the interface to convert the destination MAC address in
the customer's BPDUs.
The software requires you to specify a SuperSpan customer ID when configuring the boundary
interface. Use an ID from 1 – 65535. The customer ID uniquely identifies the customer. Use
the same customer ID for each SP interface with the same customer. When tunneling BPDUs
through the network, the Brocade devices use the customer ID to ensure that BPDUs are
forwarded only to the customer's devices, and not to other customers' devices.
• Globally enable SuperSpan. This step enables the Preforwarding state.
Configuring a boundary interface
To configure the boundary interfaces on SP 1 in Figure 57 , enter the following commands.
Brocade(config)# interface 1/1
Brocade(config-if-e1000-1/1)# stp-boundary 1
Brocade(config)# interface 1/2
Brocade(config-if-e1000-1/2)# stp-boundary 2