Specifications

Wireless Traffic
2-26
Filters
The following filters are only available using the RoamAbout AP Manager, or a Network
Management Station that uses SNMP.
• Protocol
Use the protocol filter to NOT forward specific protocol traffic to the wireless network,
which can reduce unnecessary traffic and increase the network response time.
However, filtering the wrong protocols can negatively affect the operation of the
network. When solving network problems, you should clear all filters.
• Address
This filter forwards or does not forward traffic based on the client’s MAC address.
— Addresses Denied: A client in the Addresses Denied list cannot access the LAN,
even if the client has been authenticated.
— Addresses Allowed: Clients in the Addresses Allowed list can access the LAN.
Clients must supply their MAC address to the Network Administrator. This filter
is essentially ineffective when also using authentication.
• Rate Limiting (R2)
The R2 wired interface and each radio interface can be configured independently to
limit the rate of broadcast traffic. The R2 limits broadcast traffic by specifying a
maximum number of broadcast packets that it will transmit in a 100 milliseconds (ms)
interval. For example, a value of 200 is entered for the wired interface. During a 100ms
interval, 600 broadcast packets are received on the wired interface. The R2 forwards
the first 200 packets and discards the rest.
The rate limit filter only applies to incoming traffic. In the previous example, the wired
port limits incoming traffic, but the radio interface forwards all broadcast traffic
received from the wired port, regardless of its setting.
The R2 handles unicast packets with an unknown MAC destination address the same
as broadcast packets.
• Rate Limiting (AP 2000)
Use multicast rate limiting to enable/disable the default rate limiting, and to enter the
maximum number of rate-limited frames forwarded per second.
By default, the AP 2000 limits multicast traffic to 100 Kbit/sec. Changing this
parameter could cause multicast traffic to use more network bandwidth. Should a
broadcast storm occur when this parameter is disabled, the multicast traffic could cause
a serious degradation of network performance.