@RobertCNelson thanks for that info. IMO it is preferable to use a built-in 
(guaranteed unique and immutable??) MAC address so I will stay with the new 
method. I've configured my router for the new address anyway.

Any insight or ideas where to look on the continued dropped connection 
problem? This ...

$ arp 192.168.1.12
bbbw (192.168.1.12) at (incomplete) on en0 ifscope [ethernet]

I can't figure out why the arp table entry would expire so quickly. Some 
references I found on the subject say the default is 20 minutes. Even if 
the entry expires, an ARP packet should be able to quickly reestablish the 
IP/MAC binding.


On Monday, April 16, 2018 at 11:44:41 AM UTC-7, RobertCNelson wrote:
>
> On Mon, Apr 16, 2018 at 1:12 PM, ags <[email protected] <javascript:>> 
> wrote: 
> > 
> > Update: I realized that the MAC address for wlan0 had changed - didn't 
> > expect that. Will it remain the same until another firmware upgrade? 
>
> Yes the mac address did change (for new installs)..  For old installs 
> with package updates, thru apt there is no change.. 
>
> It turns out the wl1835 has a built-in mac address.. So instead of 
> generating our own unique mac address on first boot-up and using 
> custom one, we use the wl1835 one.. 
>
> You can disable this new mac address via editing: 
>
> /etc/default/bb-wl18xx 
>
> Change: 
>
> USE_INTERNAL_WL18XX_MAC_ADDRESS=yes 
> to 
>
> #USE_INTERNAL_WL18XX_MAC_ADDRESS=yes" 
>
> and reboot and it will return to the old address. 
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/ 
>

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