Dell PowerConnect B-RX Configuration Manual page 430

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SuperSpan™
These commands configure two interfaces on the Brocade device as SuperSpan boundary
interfaces. Interface 1/1 is a boundary interface with customer 1. Interface 1/2 is a boundary
interface with customer 2. Each boundary interface is associated with a number, which is the
SuperSpan ID. The SuperSpan ID identifies the instance of SuperSpan you are associating with the
interface. Use the same SuperSpan ID for each boundary interface with the same customer. Use a
different SuperSpan ID for each customer. For example, use SuperSpan ID 1 for all the boundary
interfaces with customer 1 and use SuperSpan ID 2 for all boundary interfaces with customer 2.
Syntax: [no] stp-boundary <num>
The <num> parameter specifies the SuperSpan ID. You can specify a number from 1 – 65535.
To configure the boundary interfaces on SP 2 in Figure 34, enter the following commands.
BigIron RX(config)# interface 2/1
BigIron RX(config-if-e1000-2/1)# stp-boundary 1
BigIron RX(config)# interface 2/2
BigIron RX(config-if-e1000-2/2)# stp-boundary 2
Enabling SuperSpan
After you configure the SuperSpan boundary interfaces, enable SuperSpan. You can enable
SuperSpan globally or on an individual VLAN level. If you enable the feature globally, the feature is
enabled on all VLANs.
NOTE
If you enable the feature globally, then create a new VLAN, the new VLAN inherits the global
SuperSpan state. For example, if SuperSpan is globally enabled when you create a VLAN,
SuperSpan also is enabled in the new VLAN.
You also can change the length of the Preforwarding state to a value from 3 – 30 seconds. The
default is 5 seconds.
To globally enable SuperSpan, enter the following command.
BigIron RX(config)# super-span-global
Syntax: [no] super-span-global [preforward-delay <secs>]
The <secs> parameter specifies the length of the Preforwarding state. You can specify from 3 – 15
seconds. The default is 5 seconds.
SuperSpan is enabled in all VLANs on the device. To disable SuperSpan in an individual VLAN,
enter commands such as the following.
BigIron RX(config)# vlan 10
BigIron RX(config-vlan-10)# no super-span
Syntax: [no] super-span
Displaying SuperSpan information
To display the boundary interface configuration and BPDU statistics, enter the following command.
354 BigIron RX Series Configuration Guide
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