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Configuring Rapid Transition
Configuration prerequisites
As shown in Figure 1-8, a 3Com switch 5500-EI is connected to another manufacturer's switch. The
former operates as the downstream switch, and the latter operates as the upstream switch. The
network operates normally.
The upstream switch is running a proprietary spanning tree protocol that is similar to RSTP in the way to
implement rapid transition on designated ports. Port 1 is the designated port.
The downstream switch is running MSTP. Port 2 is the root port.
Figure 1-8 Network diagram for rapid transition configuration
Configuration procedure
1) Configure the rapid transition feature in system view
Follow these steps to configure the rapid transition feature in system view:
To do... Use the command... Remarks
Enter system view
system-view
—
Enable the rapid transition
feature
stp interface interface-type
interface-number
no-agreement-check
Required
By default, the rapid transition
feature is disabled on a port.
2) Configure the rapid transition feature in Ethernet port view
Follow these steps to configure the rapid transition feature in Ethernet port view:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter Ethernet port view
interface interface-type
interface-number
—
Enable the rapid transition
feature
stp no-agreement-check
Required
By default, the rapid transition
feature is disabled on a port.
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