Hello,

I found already 3 topics with the same problem..but don't know how to solve mine still:
http://forum.mikrotik.com/viewtopic.php?f=2&t=50787
http://forum.mikrotik.com/viewtopic.php?f=3&t=31499
http://forum.mikrotik.com/viewtopic.php?f=13&t=41293
Only one case was solved - the root cause was in pseudobridge.

Issue occurs when LCP misses echo reply on the N-time LCP Echo Request and PPPoE session terminates as if "peer is not responding".

I have this problem in our network on ROS 5.0кс10 (PPPoE server for LAN/WLAN users) for several users. Just in case, WLAN users do not use the pseudobridge mode, but physically use the same switches in the network with LAN users.
So, for some WLAN/LAN users PPPoE session is running Ok while browse the internet, but when they pause for a while (simply do nothing for 1-3 mins) the session drops, or seems "working", but hangs on and finally user shall restart the session manually.

Here is log example for LAN user:
-----------------------------------------------------------
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <0054>: rcvd LCP EchoReq idxcf
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0xf1ffccf2>
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <0054>: sent LCP EchoRep idxcf
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0x767d3963>
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <001a>: rcvd LCP EchoReq idx50
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0xe7c4af67>
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <001a>: sent LCP EchoRep idx50
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0x759732bf>
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <3e63>: rcvd LCP EchoReq idxb9
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0x42c765e0>
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <3e63>: sent LCP EchoRep idxb9
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0x145b45c6>
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <069c>: rcvd LCP EchoReq idx43
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0x9abb2369>
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <069c>: sent LCP EchoRep idx43
Apr/12/2011 09:32:42 pppoe,ppp,debug,packet <magic 0x91793c2>
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: LCP missed echo reply
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: LCP lowerdown
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: LCP closed
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: CCP lowerdown
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: BCP lowerdown
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: IPCP lowerdown
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: IPCP closed
Apr/12/2011 09:32:42 pppoe,ppp,info,account LEXXXVIN logged out, 1214 21938853 55732559 41057 46539
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: IPV6CP lowerdown
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: IPV6CP down event in starting state
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: MPLSCP lowerdown
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: MPLSCP down event in starting state
Apr/12/2011 09:32:42 pppoe,ppp,info <pppoe-LEXXXVIN>: terminating... - peer is not responding
Apr/12/2011 09:32:42 pppoe,debug,packet ether2: sent PADT to 00:23:54:2F:8A:1E
Apr/12/2011 09:32:42 pppoe,debug,packet session-idxf61d
Apr/12/2011 09:32:42 pppoe,debug,packet relay-session-id=
Apr/12/2011 09:32:42 route,debug,event Interface change
Apr/12/2011 09:32:42 route,debug,event interface=<pppoe-LEXXXVIN>
Apr/12/2011 09:32:42 route,debug,event statusOWN
Apr/12/2011 09:32:42 route,debug,event mtu=1480
Apr/12/2011 09:32:42 route,debug,event Interface change
Apr/12/2011 09:32:42 route,debug,event interface=<pppoe-LEXXXVIN>
Apr/12/2011 09:32:42 route,debug,event statusOWN
Apr/12/2011 09:32:42 route,debug,event mtu=1480
Apr/12/2011 09:32:42 route,debug,event Remove interface <pppoe-LEXXXVIN>
Apr/12/2011 09:32:42 pppoe,ppp,debug <1df6>: LCP lowerdown
--------------------------------------------------------------

Questions:
- What could cause LCP Echo Reply missing generally?
- Any ideas what to check first in the network or server settings to identify the root cause for this problem?
- The last time I tried to get 'supout.rif' was unsuccessful - server went down, so we had to reboot it... What could be the issue with supout.rif export by the way?!

Thank you in advance!

Cheers,
Andrey

I noticed the same problem in my network, some users reported to me that at times interrupts the intenet, exactly the same as it is in the log with you.
Do you know how to solve the problem?

Sorry for bringing this back from the dead, did you guys find any solution on this?
Still searching but i have no clue why is this happening...

My two cents back to the forum.
If anyone is having this situation check your wireless AP's for noise/interference. Make sure they are far away from each other (at least 6-10 meters for better results) and try using shields on them. Mine where on the same pole. Once i switched off one of them, i had 0 PPPoE session disconnections.

If you are having this problem using cable, check your cables and/or switches for malfunction.

Seems that PPPoE is very sensitive on link stability. In any case these errors help you see/find weakness on your network links (something i could not see using only Hotspot).

Regards,