User's Manual

Wireless Array
404 The Command Line Interface
operation. If you find that there is a particular type of multicast or broadcast
traffic that you want to allow, just add a specific allow filter for it before the deny
filter in this list that would normally block it. Add or delete any of the Multicast
rules as necessary for a specific site. Remember that the order of the rules is
important.
Figure 188. Air Cleaner Filter Rules
Explanations of some sample rules are below.
 Air-cleaner-Arp.1 blocks ARPs from one client from being transmitted to
clients via all of the radios. The station to station block setting doesn't
block this traffic, so this filter eliminates this unnecessary traffic.
 Air-cleaner-Dhcp.1 drops all DHCP client traffic coming in from the
gigabit interface. This traffic doesn't need to be transmitted by the radios
since there shouldn't be any DHCP server associated to the radios and
offering DHCP addresses. For large subnets the DHCP discover/request
broadcast traffic can be significant.
 Air-cleaner-Dhcp.2 drops all DHCP server traffic coming in from the
radio interfaces. There should not be any DHCP server associated to the
radios. These rogue DHCP servers are blocked from doing any damage
with this filter. There have been quite a few cases in public venues like
schools and conventions where such traffic is seen.