Re: wired PPP problem: ppp connection fail, slow down on FreeBSD but fine on Windows
- From: 张韡武 <weiwu@xxxxxxxxxxxxxxxx>
- Date: Tue, 28 Nov 2006 18:09:48 +0800
在 2006-11-28二的 18:05 +0800，张韡武写道：
The FreeBSD gateway machine has one end connect to ADSL modem through
pppoe, the other connects to LAN and act as NAT gateway.
PPP connection can be established correctly, then after 5 hour or 10
hour, connection speed become very slow or (more frequently) simply
cannot connect (a.k.a. browsing web pages time out). Then, ping from LAN
client hosts to external network would simply timeout, ping from NAT
gateway to 10.10.10.5 (that's the other end of the PPPOE connection)
keep getting this message:
ping: send to: No buffer space available
At the same time, top(1) shows 80~95 CPU resource is taken by
'interrupt'.
stop ppp by "/etc/rc.d/ppp stop" and re-start this process usually will
not get re-connected (/var/log/ppp.log is like 'carrier -> stop ->
redial', that is we don't reach the step of login). Reboot computer
usually also do not help. After fighting the problem for an hour or so,
suddenly it (pppoe) become working again.
I forgot to mention in such case (connection is slow but not completely
broken), top(1) often shows aroudn 20% to 30% CPU resource is taken by
'interrupt', 20% to 30% by ppp and around 50% free. Such situation won't
last long before connection become completely useless.
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