Having updated my 2860ac from 3.8.9 to 3.8.9.1 it has fixed the reboot issue.

But now I'm receiving these debug emails at least twice a minute (from the mail alert section) so I suspect there's something not quite right with this version too:-

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firmware exception debug info

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EPC=80a8cf38, Cause=00800010, Status=1100fc03, BadAddr=816a05b0, RetAddr=80a8ce88 exception id=4(ADEL: Address error Load) exception occured in TASK Lavel task_id=111, SP=0x816a0528(3950 bytes free, 2616 used bytes) system tick =65860625 CURRENT_VERSION : 3.8.9_RC8 get from address : 80004000

Dump CPU registers:

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$ 0: 00000000 fffffffe 00000001 afbf0014 $ 4: 80004bec 00000001 80a7dd58 00000014 $ 8: 00000000 810e8303 00000000 ffff0000
$12: 27bd0000 afbf0000 80020000 810f8000
$16: 810e8303 00000014 80004bec 816a0678
$20: 816a13d0 816a0660 816a0660 816a05b0
$24: 00000000 80c864c4 00000000 810bbe40
$28: 816a0000 816a0528 810c0000 80a8ce88

List a possible caller functions:

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func( 0)=810c0000
func( 1)=810d00c0
func( 2)=810bbcfc
func( 3)=80a8edb0
func( 4)=810c0000
func( 5)=80a86b7c
func( 6)=80a8a1e0
func( 7)=80a7e180
func( 8)=810e8302
func( 9)=808b5b70
func(10)=80a7f850
func(11)=80a7e180
func(12)=810e82ff
func(13)=810e8303
func(14)=80a803f4
func(15)=800abfd4
func(16)=8041721c
func(17)=81070000
func(18)=80a80f00
func(19)=81070000

@ianfretwell,

I think you need to raise a ticket with Draytek support for that.

John.

P.S. I was about to upgrade my 2860Vac, but I'll hold off for a while.

The router is sending cached debug logs from 3.8.9's restart problem - note the "CURRENT_VERSION : 3.8.9_RC8". It will stop doing that once it's sent out all of its logs from when your router was restarting on 3.8.9.

It only ever restarted the once though - and that was when I was logging on to install 3.8.9.1.

I've just re-enabled the debug emails to see - and sure enough, two per minute...every minute.

This is a bit defeatist I know - but if I thought raising a call would achieve anything other than being told to factory reset it and/or reflash it then I'd do just that. The forum always seems to produce better results - at least for me.