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Author Topic: Is this a serious bug in the latest Draytek 2860 firmware??  (Read 456 times)

radiodan

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Is this a serious bug in the latest Draytek 2860 firmware??
« on: February 07, 2018, 01:39:25 AM »

Hello,

For a while now, I've been experiencing issues with an IPsec LAN to LAN VPN between two sites - both using Draytek 2860's.  The issue is that the VPN is constantly dropping very briefly then re-connecting again the whole time.  The "Always On" and "Idle timeout" are set so the connection remain open.  Both sites are UK based and have solid stable ADSL connections with static IP's.

Today, I tried enabling the "Ping to keep IPsec tunnel alive" setting and entered an IP address to see if this would prevent the connection dropping all the time.

What happen them was total calamity.  The WHOLE network went down.  Multiple access points, 10 IP cameras, all IP phones as well as other PC connections and network switches (and these are on on different VLANs - we have quite a large network here).  All lost the ability to ping anything and get a DHCP address.  Even devices on the same subnet with static IP's couldn't communicate with each other.  It's as if I was experiencing a massive DDoS attack on the whole network! 

After a short while, the 2860 appeared to reboot; however as soon as the ADSL connection and VLAN came back up, the same thing happened again.  I had to physically pull out the ADSL connection so the 2860 would reboot ok and I can disable the "Pink to keep IPsec tunnel alive" option.

This is very concerning.  Any pointers on what could be happening?  I can only see it as being a massive bug in the 2860 firmware, as NOTHING else was changed.

Thanks,

D
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radiodan

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Re: Is this a serious bug in the latest Draytek 2860 firmware??
« Reply #1 on: February 07, 2018, 02:08:20 AM »

An update...

I've just tried adjusting the "Idle timeout" value. Upon re-enabling the "always on" option after a short test period, then 2860 locked up then re-booted. In between this and the first incident I reloaded the firmware incase the original had got corrupted.

Defiantly a bug!
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dorzb

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Re: Is this a serious bug in the latest Draytek 2860 firmware??
« Reply #2 on: February 07, 2018, 08:55:20 AM »

Please check this thread, not the same issue but might be helpful.

http://forum.kitz.co.uk/index.php?topic=16146.0
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radiodan

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Re: Is this a serious bug in the latest Draytek 2860 firmware??
« Reply #3 on: February 08, 2018, 01:04:54 AM »

Thanks for the heads up.

However, i've had further issues with the VPN today which resulted in the router crashing again.  This time it e-mailed me debug info..

---------firmware exception debug info-----------------------------
 EPC=8008301c, Cause=80800008, Status=1100fc03, BadAddr=00000000, RetAddr=80082f58
 exception id=2(TLB Load)
 exception occured in IdleTask Timeout
 task_id=125, SP=0x8167fb30(4532 bytes free, 288 used bytes)
 system tick =7483528
 CURRENT_VERSION : 3.8.6_RC4
 get from address : 80004000

 Dump CPU registers:
-----------------------------------------
 $ 0: 00000000 fffffffe 00b479d0 00000001
 $ 4: 83b32a88 0000000a 00000000 8241eba0
 $ 8: 00000000 000000a0 00030000 824226d0
 $12: 0000000f 8167f350 80e7c128 ffffffff
 $16: 00b479c8 00b479d0 83b479c0 83b479d0
 $20: 81a76f1c ffffffe9 ffffffea 0000007a
 $24: 00000002 00000000 8241eba0 00000000
 $28: 815c7000 8167fb30 81a76f20 80082f58

List a possible caller functions:
----------------------------------
 func( 0)=810b0000 
 func( 1)=810b0000 
 func( 2)=800830c4 
 func( 3)=803bf97c

List backtrace functions:
----------------------------------
 func( 0)=8008301c 
 func( 1)=800830c4 
 func( 2)=803bf97c


Coming to think about it, all of these problems started when I upgraded the 2860 to the latest firmware (3.8.6.0).  I have since rolled it back to the previous version 3.8.5.3 and so far (!) all seems to be well...

Dan 
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burakkucat

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Re: Is this a serious bug in the latest Draytek 2860 firmware??
« Reply #4 on: February 08, 2018, 06:26:22 PM »

I suggest that you open a bug report with Draytek and send them all the relevant information, including the e-mail message.
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:cat:  100% Linux and, previously, Unix. Co-founder of the ELRepo Project.

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