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Chapter 8
Configuring Spanning Tree Protocol
Table 8-2
Setting
Ethernet port priority
Radio port path cost
Radio port priority
The radio and Ethernet interfaces and the native VLAN on the access point are assigned to bridge group
1 by default. When you enable STP and assign a priority on bridge group 1, STP is enabled on the radio
and Ethernet interfaces and on the primary VLAN, and those interfaces adopt the priority assigned to
bridge group 1. You can create bridge groups for sub-interfaces and assign different STP settings to
those bridge groups.
Configuring STP Settings
Beginning in privileged EXEC mode, follow these steps to configure STP on the access point:
Command
Step 1
configure terminal
Step 2
interface { dot11radio number | fastethernet
number }
Step 3
bridge-group number
Step 4
no bridge-group number spanning-disabled
Step 5
exit
Step 6
bridge number protocol ieee
Step 7
bridge number priority priority
Step 8
end
Step 9
show spanning-tree bridge
Step 10
copy running-config startup-config
OL-14209-01
Default STP Values When STP is Enabled (continued)
Default Value
128
33
128
Purpose
Enter global configuration mode.
Enter interface configuration mode for radio or Ethernet
interfaces or sub-interfaces.
The 2.4-GHz radio and the 2.4-GHz 802.11n radio is 0.
The 5-GHz radio and the 5-GHz 802.11n radio is 1.
The fast Ethernet interface is 0.
Assign the interface to a bridge group. You can number your
bridge groups from 1 to 255.
Counteract the command that automatically disables STP for a
bridge group. STP is enabled on the interface when you enter
the bridge n protocol ieee command.
Return to global configuration mode.
Enable STP for the bridge group. You must enable STP on
each bridge group that you create with bridge-group
commands.
(Optional) Assign a priority to a bridge group. The lower the
priority, the more likely it is that the bridge becomes the
spanning-tree root.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
Configuring STP Features
8-9
- Quick Links:
- Repeater Access Point
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