Frame descriptions Route Record Indicator - 0xA1
Digi XBee® 3 Zigbee® RF Module
312
Route Record Indicator - 0xA1
Description
This frame contains the routing information for a remote device on the network. This route
information should be stored in external memory and used in a 0x21 Create Source Route frame to
provide a return route for data transmissions; this eliminates the need to perform a route discovery.
The frame will be emitted out of the node that is acting as a low RAM concentrator when a unicast
data transmission is received from a remote node for the first time. If a previously established route
fails, a new 0xA1 Route Record Indicator will be generated with information about the new route.
Format
The following table provides the contents of the frame. For details on frame structure, see API frame
format.
Frame data fields Offset Description
Frame type 3 0xA1
64-bit source
(remote) address
4-11 The 64-bit address of the device that initiated the route record.
Source (updater)
16-bit address
12-13 The 16-bit address of the device that initiated the route record.
Receive options 14
0x01 - Packet Acknowledged.
0x02 - Packet was a broadcast.
Number of addresses 15 The number of addresses in the source route (excluding source
and destination).
Address 1 16-17 (neighbor of destination)
Address 2 (closer hop) 18-19 Address of intermediate hop
Address n (neighbor of
source)
20 Two bytes per 16-bit address.
21
Example
Suppose device A is a low RAM concentrator, and device E is sending a unicast message to it.
Device E knows that device A is a low RAM concentrator and will send a route record that traverses
multiple hops en route to the concentrator as shown in the following example:
A < B < C < D < E
In this frame, the following route information is provided:
Device E 64-bit address: 0x0013A200 40401122
Device E 16-bit address: 0x3344
Device D 16-bit address: 0xEEFF
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