WESM zl Management and Configuration Guide Supplement 2007-09

9
Radio Ports
Radio Ports as Layer 3 Devices
You can configure the network to allow radio port adoption and
communication over Layer 3.
Note During radio port adoption, the Module automatically downloads a
compatible bootloader code version into the radio port. However, to support
Layer 3 adoption, a suitable bootloader code version must already be
operating in the radio port. If a radio port fails Layer 3 adoption, it may be
necessary to first adopt the radio port at Layer 2 so that it is updated with a
suitable bootloader code version, and then re-installed for adoption at Layer 3.
A radio port initially attempts to establish communication with a Module using
Layer 2. If that fails, a radio port sends a DHCP request to begin the process
of establishing communication with a Module.
After acquiring an IP address and a default gateway, the radio port next needs
a Module’s IP address. Depending on your network configuration, a Module’s
IP address is acquired using either a special DHCP option (option 189) or
through the Domain Name System (DNS).
Figure 2
shows the VLANs and network components needed for Layer 3 radio
port adoption. For more information, see “Network Requirements for Layer 3
Adoption” in the Management and Configuration Guide for your zl Module.