Cisco Cisco Aironet 340 Ethernet Bridges Guia Do Utilizador

Client nodes and repeater bridges request to be associated with a parent 
bridge so the parent will forward data frames. This exchange of radio 
packets passes back and forth information such as a node’s address, 
device, association type, and ASCII name. This information is entered 
into the bridge’s association table along with the address of the parent 
bridge. Each bridge maintains entries in its table for all nodes associated 
to it and all nodes associated to any repeater serving it. There may be up 
to 2048 entries in the table.

A bridge will accept an association from any node that requests it.
The operator may set up entries in the association table to control
which nodes are allowed to associate. 

Using the information in the association table, the bridge can perform a 
variety of traffic-control functions in moving packets to their proper 
destination on the infrastructure. When packets are received from the 
Ethernet or radio network, the bridge will look in its table for the 
packet’s destination address and do one of the following: 

n If the entry shows the radio node is associated to this unit, the 

packet can be forwarded directly.

n If the entry indicates that the entry is associated to a repeater 

serving this unit, the packet is forwarded to the repeater.

n If the address is not found, a root unit will forward the packet to the 

wired LAN, while a repeater will forward the packet to its own 
parent bridge.