Rajant Corporation BreadCrumb LX3 User Manual - page 23
Rajant Corporation
BreadCrumb
®
LX/LX3 User Guide
03-100101-001
Version: 2.91
3 Deploying the BreadCrumb Wireless Network
There are many factors which need to be taken into account when deploying the BreadCrumb
Wireless Network (BCWN). Section 3.1 describes the addressing scheme of the BCWN. Section
3.2 discusses channel assignments. Section 3.3 details some of the most commonly occurring
environmental factors that will have a major impact on the performance of the BCWN. Finally,
section 3.4 details guidelines and methodology needed to follow when deploying the BCWN.
3.1 Addressing
When routing to another network or when using its own embedded DHCP servers, the BreadCrumb
Wireless Network requires that wireless devices use IPv4 addresses in the Class A network
10.0.0.0/8 (that is, any address that begins with ‘10.’). If you are not connected to another network,
or if you are bridging to one rather than routing to it, your wireless client devices may have any
address whatsoever.
Note
Any devices running the BC|Commander or the BCAdmin management application
must have an address in the 10.0.0.0/8 range. This may be in addition to other
addresses the devices may have configured.
3.1.1 BreadCrumb Device Addresses
Each BreadCrumb radio has one IPv4 address in the Class A network 10.0.0.0/8. These addresses are
assigned during manufacturing and cannot be changed in the field. Rajant ensures during
manufacturing that these addresses are not duplicated between any two BreadCrumb devices.
Addresses assigned to BreadCrumb devices can be viewed using BC|Commander or BCAdmin.
3.1.2 DHCP
Each BreadCrumb device includes an embedded DHCP server. You may safely enable the DHCP
servers of multiple BreadCrumb devices simultaneously, and it is in fact the most common case that
all BreadCrumb devices in a BCWN run DHCP servers. Address conflicts among DHCP clients are
prevented by using the unique BreadCrumb device addresses assigned at the factory as a base.
A BreadCrumb device determines its DHCP range as follows:
1.Start with the first three bytes of the first radio’s IPv4 address.
Add a low-byte range of 10 to 210.
3.2 Channel Assignments
By default, BreadCrumb devices use channels 1 and 11 upon startup. BreadCrumb devices can be
configured via BC|Commander or BCAdmin to choose their radio channels automatically upon
startup instead. With this feature enabled, combinations of channels 1, 8, and 11 are automatically
chosen using a process designed to provide a robust mesh.
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