Rajant Corporation
BreadCrumb
®
ME3 User Guide
03-100116-001
Version: 1.02
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 in gateway mode 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 computers running the BC|Commander management application must have an
address in the same range as the BreadCrumbs they manage. Refer to the BC|
Commander User Guide document for the details of BreadCrumb IP adrress
configuration.
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.
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:
•
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 ME3-09 model devices use channel 6, and BreadCrumb ME3-24 model
devices use channel 11 upon startup. In some cases, however, it may be necessary to manually set
the radios to specific channels. Refer to the BC|Commander User Guide document for the details of
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