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3-25
Cisco Wireless LAN Controller Configuration Guide
OL-8335-02
Chapter 3 Configuring Ports and Interfaces
Configuring Ports
Step 8 Table 3-7 lists and describes the controller’s configurable STP parameters. Follow the instructions in the
table to make any desired changes.
Max Age (seconds) The maximum age of STP information learned from the network on any
port before it is discarded.
Hello Time (seconds) The amount of time between the transmission of configuration BPDUs
by this node on any port when it is the root of the spanning tree or trying
to become so. This is the actual value that this bridge is currently using.
Forward Delay (seconds) This value controls how fast a port changes its spanning tree state when
moving toward the forwarding state. It determines how long the port
stays in each of the listening and learning states that precede the
forwarding state. This value is also used, when a topology change has
been detected and is underway, to age all dynamic entries in the
forwarding database.
Note This is the actual value that this bridge is currently using, in
contrast to Stp Bridge Forward Delay, which is the value that
this bridge and all others would start using if this bridge were
to become the root.
Hold Time (seconds) The minimum time period to elapse between the transmission of
configuration BPDUs through a given LAN port.
Note At most, one configuration BPDU can be transmitted in any
hold time period.
Table 3-7 Controller Spanning Tree Parameters
Parameter Description
Spanning Tree Algorithm Enables or disables STP for the controller.
Options:Enable or Disable
Default: Disable
Priority The location of the controller in the network topology and how well the
controller is located to pass traffic.
Range: 0 to 65535
Default: 32768
Maximum Age (seconds) The length of time that the controller stores protocol information
received on a port.
Range: 6 to 40 seconds
Default: 20 seconds
Table 3-6 Controller Spanning Tree Status (continued)
Parameter Description