User's Manual

Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
28 www.cooperbussmann.com/wirelessresources Rev Version 1.4.0
Router Operation (Routed Network)
A router joins separate IP sub-networks together. The router has different IP addresses on its wired and wireless ports,
reflecting the different IP addresses of the separate Ethernet sub networks. All of the devices in these separate networks
identify the router by IP address as their gateway to the other network. When devices on one network wish to
communicate with devices on the other network, they direct their packets to the router for forwarding.
As the router has an IP address on each of the networks it joins, it inherently knows the packet identity. If the traffic
directed at the router cannot be identified for any of the networks to which it is connected, the router must consult its
routing rules as to where to direct the traffic to. For details on configuring routing rules, see section 3.10 IP Routing
Bridge STP (Spanning Tree Protocol)
network loops and provide redundant paths in networks. To enable tick
the STP box on the configuration page.
For example, consider this network with a redundant wireless link. If the
bridge Spanning Tree Protocol is enabled, one of the two wireless links
will be disabled - that is, all wireless data will be transferred by one link
only. If the active link fails, the other link will automatically start
transferring the wireless data.
The Spanning Tree Protocol implemented is IEEE 802.1d compatible. The algorithm forms a loop-free network by
blocking traffic between redundant links in the network. These blocked links are placed in a standby condition, and may
be automatically enabled to repair the network if another link is lost. The Spanning Tree Algorithm maintains a single path
between all nodes in a network, by forming a tree-like structure. The Bridge Priority determines where the node sits in the
tree. A Bridge configured with the lowest priority (0) will become the root node in the network, and will direct traffic
between each of its branches. The root node is typically the
unit that handles the majority of traffic in the network. The 450U-E is configured with a Bridge Priority of 32768 by
default. The intention is to reduce traffic that the 450U-E must handle, by placing it at the branch level in the network tree.
As a branch, the 450U-E
There is some overhead in maintaining a network utilizing the Spanning Tree Algorithm. Users wishing to increase their
throughput, at the expense of redundancy should disable Spanning Tree. The Spanning Tree Protocol can be configured
on the Repeaters configuration page.
Security Menu 3.6
Select the Radio Encryption level from the drop down menu on the Network page and
button.
Available encryption levels are listed below and explained in greater detail later in the section:
 None
 WEP128 (Wired Equivalent Privacy)
 WPA2-PSK (AES) (Wi-Fi Protected Access 2)
When selection has been made, it is important to save the configurat
When all selections have been made the configuration needs to be saved and the module restarted by
Changes and
Figure 29 - Spanning Tree Protocol
Figure 30 - Security Menu