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CC2530: When does the network address of a router change

Aviral Gupta
Expert 1385 points
Part Number: CC2530
Other Parts Discussed in Thread: Z-STACK,

We have a network of around 100 routers and a coordinator.

The network has been formed. It is observed that over time some of the routers will change their network address.
Since there are no new devices joining the network. what could be the cause for his behavior?

  • 0
    TI__Mastermind 35070 points

    Hi,

    I assume you are using Z-Stack 3.0.2 (from your previous posts)?

    Please provide a sniffer log of this behavior, and describe which packets show evidence of this behavior.

    Also, please note that there are inherent memory limitations for the CC2530, so if the coordinator is a CC2530, please refer to http://www.ti.com/lit/wp/swra635/swra635.pdf

    Regards,
    Toby

  • 0 in reply to Toby
    Expert 1385 points

    For this we are using the ZStack 2.6.1
    This behavior is observed in the deployment sites.
    And also network address change happens over few days(not very frequent and is not predictable).

    For the above stated reasons it is not feasible to get the sniffer logs for this behavior .

    we do not have shortage in available flash or ram both in routers as well as coordinator.

    For Router

     214 261 bytes of CODE  memory (+             45 743 range fill )
      32 bytes of DATA  memory (+ 81 absolute )
   7 556 bytes of XDATA memory
     192 bytes of IDATA memory
       8 bits  of BIT   memory
     440 bytes of CONST memory

    For coordinator

     224 127 bytes of CODE  memory
      33 bytes of DATA  memory (+ 67 absolute )
   7 781 bytes of XDATA memory
     192 bytes of IDATA memory
       8 bits  of BIT   memory
     351 bytes of CONST memory

  • 0 in reply to Aviral Gupta
    TI__Mastermind 35070 points

    Thanks for providing more details.

    Zstack 2.6.1 is based on the r20 version of the Zigbee specification, which could still use distributed address assignment mechanism.
    Devices were allocated addresses based partially on their network depth (ie number of hops from the coordinator). So if the routers are moved around at all such that their network depth has changed, then they could potentially be assigned a different address.

    If no adverse effects are seen during operation, I wouldn't worry about this.