Intermec WA21 System Manual page 34

Chapter 1 — Getting Started
20
• If you have an 802.11g or 802.11b network and you want the
designated bridge to also communicate with wireless end devices (point-
to-multipoint), the designated bridge must have two radios. 802.11g
radios can communicate with the 802.11b radios and vice versa. The
designated bridge master radio parameters must match the end devices
radio parameters, and the station radio parameters must match the root
master radio parameters.
Data from wireless end devices should not go through more than three
wireless hops before it gets to an access point on the primary LAN.
You need to set the root priorities and secondary LAN bridge priorities for
the bridge on the primary LAN and for the bridge on the secondary LAN:
• On the primary LAN bridge, set the root priority to a number that is
greater than the root priority of the secondary LAN bridge. The access
points will not form a point-to-point bridge if the primary LAN bridge
has a lower root priority than the secondary LAN bridge.
• On the secondary LAN bridge, set the root priority to 0 and the
secondary LAN bridge priority to a number other than 0.
You may also need to adjust the flooding parameters. Here are some
recommendations:
• If there are no end devices on the secondary LAN, the bridge on the
secondary LAN can use the default flooding settings. The Secondary
LAN Flooding parameter is disabled.
• If there are end devices on the secondary LAN, the bridge on the
secondary LAN should have Secondary LAN Flooding parameter set to
Multicast. If you also want unicast flooding, you can set this parameter
to Enabled.
• If there are end devices on the secondary LAN and the end devices
communicate with end devices on another secondary LAN, the root
access point should have its Multicast Flooding parameter set to
Universal. This setting ensures that all ARP requests and multicast
traffic is distributed through a second or third hop.
To install a point-to-multipoint bridge
1 Follow the instructions for installing a simple wireless network on page
10.
2 Configure the LAN ID. For help, see "Configuring the Spanning Tree
Parameters" on page 105.
3 Configure one of the master radio service sets in the designated bridge
on the secondary LAN to communicate with the end device radios.
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