# XBEE routers sometimes loose lower 6 bytes of Extended PAN ID

**URL:** <https://forums.digi.com/t/xbee-routers-sometimes-loose-lower-6-bytes-of-extended-pan-id/21770>\
**Category:** XBee - Zigbee\
**Tags:** panid, xbee\
**Created:** [September 15, 2020, 10:00am UTC](https://forums.digi.com/t/xbee-routers-sometimes-loose-lower-6-bytes-of-extended-pan-id/21770 "2020-09-15T10:00:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jeon\_Youngmin](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@Jeon\_Youngmin](https://forums.digi.com/u/Jeon_Youngmin)\
**Post date:** [September 15, 2020, 10:00am UTC](https://forums.digi.com/t/xbee-routers-sometimes-loose-lower-6-bytes-of-extended-pan-id/21770/1 "2020-09-15T10:00:32Z")

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Hi,

I’m doing test with one coordinater(connected to PC) and 5 routers(+ Arduinos).  
[Extended PAN ID = ‘2’,‘0’,‘2’,‘0’,‘I’,‘D’,‘A’,‘B’)

Normally, all of them works fine.  
But sometimes 1 or 2 routers leave its network and change their Extended PAN ID like,  
Original extended PAN ID = ‘2’,‘0’,‘2’,‘0’,‘I’,‘D’,‘A’,‘B’ -\> ‘2’,‘0’ .

(I guess this comes up after power cycling, but not exactly.)

If there’s someone who knows why, please let me know. thank you.

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [September 15, 2020, 11:35am UTC](https://forums.digi.com/t/xbee-routers-sometimes-loose-lower-6-bytes-of-extended-pan-id/21770/2 "2020-09-15T11:35:35Z")

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Yes, if you power cycle the coordinator, it can change networks.