4. Deploying a BreadCrumb Mesh Network
Many factors must be considered when deploying a BreadCrumb mesh network. This chapter describes
the addressing scheme of the mesh, channel assignments and some of the most common environmental
factors that will have a major impact on the performance of the mesh. The Deployment Methodology
subchapter provides guidelines and a methodology for deploying the mesh.
For information on physical installation, grounding waterproofing connections, see Installation
Guidelines and the Appendix Technical Bulletins.
4.1 Addressing
When in gateway mode or when using its own embedded DHCP servers, the BreadCrumb mesh 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 your network is not connected to another network or your network is bridging to a another
network, rather than routing to the network, the wireless client devices may not have any addresses
whatsoever.
Note
Note
Each BC|Commander host must have an address in the same range as the managed BreadCrumbs.
Each BC|Commander host must have an address in the same range as the managed BreadCrumbs.
Refer to the
Refer to the
BC|Commander Version 11 User Guide
BC|Commander Version 11 User Guide
for details about IP address configuration for a
for details about IP address configuration for a
BreadCrumb.
BreadCrumb.
4.1.1 BreadCrumb Device Addresses
Each BreadCrumb radio has one IPv4 address in the Class A network 10.0.0.0/8. During the manuafactur-
ing process, Rajant ensures that default addresses are not duplicated between any two BreadCrumb de-
vices. Addresses assigned to BreadCrumb devices can be viewed in BC|Commander. Addresses can be
configured manually or set to DHCP.
4.1.2 DHCP
Each BreadCrumb device includes an embedded DHCP server. You may safely enable the DHCP servers of
multiple BreadCrumb devices simultaneously. 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 IPv4 address for the BreadCrumb.
Add a low-byte range of 10 to 210.
4.2 Channel Assignments
Each BreadCrumb radio has default channels assigned based on the frequency and type of the radio.
The following table lists each radio frequency and the corresponding default channel assignments. When
more than one radio of the same frequency is present, there may be default channels for the additional
radios. This table includes radios that may be found in various BreadCrumb models, not one specific
model.
Table: Default Channel Assignments
Radio Card Frequency and Type Default Channel Second Default Third Default
900 MHz 802.11g/900 MHz 802.11n 5
2.4 GHz 802.11n 11 1
2.4 GHz 802.11g 11 1
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