Spanning Tree
RSTP Interface Settings
Cisco 350XG & 550XG Series 10G Stackable Managed Switches
268
13
•
Designated Cost
—Displays the cost of the port participating in the STP
topology. Ports with a lower cost are less likely to be blocked if STP detects
loops.
•
Forward Transitions
—Displays the number of times the port has changed
from the
Blocking
state to
Forwarding
state.
•
Speed
—Displays the speed of the port.
•
LAG
—Displays the LAG to which the port belongs. If a port is a member of
a LAG, the LAG settings override the port settings.
STEP 4
Click
Apply
. The interface settings are written to the Running Configuration file.
RSTP Interface Settings
Rapid Spanning Tree Protocol (RSTP) enables a faster STP convergence without
creating forwarding loops.
The RSTP Interface Settings page
enables you to configure RSTP per port. Any
configuration that is done on this page is active when the global STP mode is set
to RSTP or MSTP.
To enter RSTP settings:
STEP 1
Click
Spanning Tree
>
STP Status and Global Settings
.
STEP 2
Enable
RSTP
.
STEP 3
Click
Spanning Tree
>
RSTP Interface Settings
. The RSTP Interface Settings
page appears:
STEP 4
Select a port.
NOTE
Activate Protocol Migration is only available after selecting the port
that is connected to the bridge partner being tested.
STEP 5
If a link partner is discovered by using STP, click
Activate Protocol Migration
to
run a Protocol Migration test. This discovers whether the link partner using STP
still exists, and if so whether it has migrated to RSTP or MSTP. If it still exists as an
STP link, the device continues to communicate with it by using STP. Otherwise, if it
has been migrated to RSTP or MSTP, the device communicates with it using RSTP
or MSTP, respectively.
