Cisco Cisco Aironet 340 Ethernet Bridges Guia Do Utilizador

When a node address filter is entered by IP address, the Aironet 340 
Series Bridge first determines the infrastructure address associated with 
this IP address. The actual filtering is done based on the infrastructure 
address.

Protocol filtering bases the filtering decision on the type of protocol 
used to encapsulate the data in the packet. This type of filtering can have 
the most value in almost all situations and is the preferred method of fil-
tering. With this type of filtering you may set the Aironet 340 Series 
Bridge to only forward those protocols, over the radio, that are being 
used by the remote radio nodes. Selecting protocols is easier than setting 
up filters based on addresses.

The Aironet 340 Series Bridge may be set up to monitor and record the 
list of protocols currently being forwarded over the radio. It will record 
the protocols found, how may packets were encountered and whether the 
packet came from the LAN or the radio.

To set up the protocol filters, start the monitor and let it run for a while 
under normal use. Add filters by selecting the protocols from the 
monitor list.

There is a default action for those protocols not in the list of explicitly 
filtered protocols. If you know exactly which protocols are going to be 
used by the radio nodes, set the default action to discard and add filters 
to forward only those protocols that will be used. If you are not sure of 
all the protocols that will be used but you know that there are certain 
protocols you will not use, you would set the default to forward and add 
filters to discard only those protocols you will not use.

For filtering purposes the bridge assumes that the data portion of the 
packets is in one of two forms:

                  IP ADDRESS FILTERS

   IP Address    MAC Address Src

--------------- ------------ ---

149.023.165.186  004096206892 Fwd                                               

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