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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-30644-01
Chapter19 Configuring Repeater and Standby Access Points and Wo rkgroup Bridge Mode
Configuring Workgroup Bridge Mode
Step3 station-role workgroup-bridge
[universal mac-address]
Set the radio role to workgroup bridge.
(Optional) When configured as a workgroup bridge, the access
point sends specific messages to the primary access point to
inform it about the MAC addresses of wired clients relayed
through the workgroup bridge radio. When the primary access
point is not a Cisco access point, these messages are not
understood.
To allow the workgroup bridge to successfully associate and
communicate with a non-Cisco access point, you can use the
universal optional argument. A restriction of this mode is that
only one wired client is supported.
When configuring this mode you need to configure the MAC
address of the wired client, to which the traffic should be relayed
through the workgroup bridge. Instead of sending the list of wired
clients to the primary AP, the workgroup bridge will directly
associate to the access point using the wired client’s MAC
address. If the wired client’s MAC address is not found in the
workgroup bridge’s MAC address table, the workgroup bridge
associates using its own MAC address. Then, when the wired
client is connected and its MAC address appears in the workgroup
bridge MAC address table, the WGB disassociates and then
re-associates using the wired client’s MAC address. This process
supports non-Cisco access points that need a unique mapping
between a wireless client and a MAC address.
Step4 station-role workgroup-bridge
multicast mode {client |
infrastructure}
(Optional) When the primary access point is configured with the
infrastructure client command, multicast frames are also sent to
workgroup bridges via unicast. In such cases, the multicast
frames relayed via unicast contain four MAC addresses in the
header: Workgroup bridge unicast destination MAC address,
Transmitting access point MAC address, Multicast destination
MAC address, Original sender source MAC address).
The original multicast frame header only contains three MAC
addresses: Multicast destination MAC address, Transmitting
access point MAC address, Original sender source MAC address.
When using the infrastructure client command on the primary
access point, use the station role workgroup-bridge multicast
mode infrastructure to instruct the workgroup bridge to ignore the
multicast frames and only process the relayed unicast copies of
the multicast frames. Use the station role workgroup-bridge
multicast mode client to instruct the workgroup bridge to only
consider the standard frames, and ignore any relayed frame that
would display four MAC addresses in the header.
•client—Client-mode accepts only 3-MAC address header
multicast packets
•infrastructure—Infrastructure-mode accepts only 4-MAC
address header multicast packets
Step5 ssid ssid-string Designates the SSID that the workgroup bridge should use to
associate to a parent access point or a bridge.
Command Purpose