Configuring the Spanning Tree Protocol
Configuring STP Status and Global Settings
Cisco 500 Series Stackable Managed Switch Administration Guide
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To set the STP status and global settings:
STEP 1
Click
Spanning Tree
>
STP Status & Global Settings
. The
STP Status & Global
Settings
page is displayed.
STEP 2
Enter the parameters.
Global Settings:
•
Spanning Tree State
—Enable or disable STP on the switch.
•
STP Operation Mode
—Select an STP mode.
•
BPDU Handling
—Select how Bridge Protocol Data Unit (BPDU) packets are
managed when STP is disabled on the port or the switch. BPDUs are used to
transmit spanning tree information.
-
Filtering
—Filters BPDU packets when Spanning Tree is disabled on an
interface.
-
Flooding
—Floods BPDU packets when Spanning Tree is disabled on an
interface.
•
Path Cost Default Values
—Selects the method used to assign default path
costs to the STP ports. The default path cost assigned to an interface varies
according to the selected method.
-
Short
—Specifies the range 1 through 65,535 for port path costs.
-
Long
—Specifies the range 1 through 200,000,000 for port path costs.
Bridge Settings:
•
Priority
—Sets the bridge priority value. After exchanging BPDUs, the device
with the lowest priority becomes the Root Bridge. In the case that all bridges
use the same priority, then their MAC addresses are used to determine
which is the Root Bridge. The bridge priority value is provided in increments
of 4096. For example, 4096, 8192, 12288, and so on.
•
Hello Time
—Set the interval (in seconds) that a Root Bridge waits between
configuration messages. The range is 1 to 10 seconds.
•
Max Age
—Set the interval (in seconds) that the switch can wait without
receiving a configuration message, before attempting to redefine its own
configuration.
•
Forward Delay
—Set the interval (in seconds) that a bridge remains in a
learning state before forwarding packets. For more information, refer to
Defining Spanning Tree Interface Settings
.
