<div>Hi Stavros,</div><div><br></div><div>For this disconnection you've included it looks as thou the line has dropped then the pppoe (so a sync issue would be the cause).</div><div><br></div><div><div><i>Mar 18 23:04:13 (none) daemon.crit syslog: Clear IP addresses. Connection DOWN.</i></div>
<div><i>Mar 18 23:04:13 (none) daemon.crit syslog: Clear IP addresses. PPP connection DOWN.</i></div></div><div><br></div><div>However where you're seeing a seperate PPPoE disconnect but without the sync drop read on:</div>
<div><br></div>Pastebin it looks like that was taken directly from one of the RB450G's, there's a number of things to look at here to determine what might be a possible cause, including the default ppp profile setups on the RB450G's<div>
<div><br></div><div>Are you able to include the output of <i>/ppp profile export </i>excluding any profiles you're not using?</div><div><br></div><div>Just guessing based on what you've said so far but it could be incorrectly set keep-alive or session timeout on the RB450G </div>
<div><br></div><div>If a modem isn't responding to the keep-alive requests then it'll be disconnected, turning this off will stop sessions from disconnecting unless initiated by a user-disconnect or the BRAS is rebooted (or manually via winbox/ssh etc). If you're just trying to determine the cause, I'd try setting this to 0 and ensure the one-session-per-host value on the ppp profile is active.</div>
</div><div><br></div><div><span style="font-family:arial,sans-serif;font-size:13px;border-collapse:collapse;color:rgb(136, 136, 136)"><div>Have a super mega nice day.</div><div><br></div>Kind Regards,<br>Andrew Cox, MTCNA<br>
AccessPlus - Head Network Administrator <br></span><span style="border-collapse:collapse;color:rgb(136, 136, 136);font-family:arial, sans-serif;font-size:13px">BigAir Universe Broadband - Senior Network Administrator</span><div>
<span style="font-family:arial,sans-serif;font-size:13px;border-collapse:collapse;color:rgb(136, 136, 136)">Ph: 1300 739 822 (7am - 12 midnight AEST)</span></div><br><div class="gmail_quote">On 29 April 2011 01:42, Stavros Patiniotis <span dir="ltr"><<a href="mailto:stavros@staff.esc.net.au">stavros@staff.esc.net.au</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hello,<br>
<br>
For simplicity I'll answer all the questions here in one reply.<br>
<br>
The dslams, which are used in private building setups, where purchased from<br>
Versatek. The model is the 24 port adsl2+ vx1000mdi -<br>
<a href="http://www.versatek.com./products/vx1000md.htm" target="_blank">http://www.versatek.com./products/vx1000md.htm</a>.<br>
<br>
Originally the BRAS were Mikrotik RB450G, but not being familiar with these<br>
devices, I recently installed a Cisco 1841. Before we took over the services<br>
where in bridged mode, but we've made an effort of the last couple months to<br>
swap to pppoe. This is when we've noticed the problem as radius reports<br>
between Lost-Carrier & User-Request disconnects etc. The dslam functionality<br>
is very basic and so there is no way to tell if a port is losing sync,<br>
unless you are polling a web interface every 30 seconds (which I haven't<br>
done).<br>
<br>
I have tried a couple different firmware versions (as supplied by versatek),<br>
as a result of this issue, with no improvement.<br>
<br>
A trace of PPP on the bras and modem shows that the modem's are requesting<br>
the disconnect, even though all keepalives are being received and modems in<br>
nailed up mode etc. <a href="http://pastebin.com/PK3MjQgy" target="_blank">http://pastebin.com/PK3MjQgy</a><br>
<br>
We have customers using a variety of modems eg Netgear, TPlink, VER170P and<br>
Netcomm NB5, NB6 etc. The PPP drops happens on the nb6plu4w but not the nb6.<br>
Running a windows 7 pppoe session through the nb6plus4w (ie as a simple<br>
bridge) will solve the problem.<br>
<font color="#888888"><br>
Stavros<br>
</font><div><div></div><div class="h5"><br>
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