Date: Fri, 15 Mar 1996 07:04:37 -0600 From: Mike Eggleston <mikee@green.eggtech.com> To: jlwest@tseinc.com Cc: freebsd-questions@freebsd.org Subject: Re: Help!! Severe PPP problems! Message-ID: <199603151304.HAA27125@green.eggtech.com> In-Reply-To: <199603140946.JAA02128@bsd.tseinc.com> (jlwest@tseinc.com)
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>>>>> "Jay" == Jay L West <jlwest@tseinc.com> writes: > We are a small start-up ISP. We started with a 28.8k connection to > our upstream provider and about 7 users. We ran that way for a few > months and all went very well. Then we switched our upstream > connection to 64k ISDN and all h*** broke lose. Here's what happens: > After a fresh boot everything runs great for from 30 minutes to 2 > hours roughly. Then I notice via systat -pigs and ps -aux that the > ppp daemon running the connection to our provider starts using 124% > of the cpu. The process shows as 'ppp -auto providername'. It is > using 500k virtual memory and 440k real memory. It is runnable > (flags are Rs). When I try a ping to our provider I get either no > response (the ping just hangs) or sometimes I get 'no buffers > available'. A tcpdump -i tun0 -q shows no traffic in or out. A > netstat -i shows no errors in or out. A netstat -s shows no checksum > problems. Sometimes systat will say segmentation fault. The ppp link > via ISDN to our provider is running at 155200k baud on a 16550 > UART. We're running 2.0.5 on a 486dx4/100 with 16mb of RAM. When I > first noticed a ping generated the message 'no buffer space > available' I set NMBCLUSTERS to 1500 and then later set it to > 2048. I have spent two days trying to trouble shoot the problem and > customers are getting upset (there's a euphamism ): ). Any help > would be very very very much appreciated. We may try to upgrade with > a fresh install to 2.1 if that would help. Does anyone have any > ideas? Please? > Jay West The Software Exchange (1-800-669-8203) I couldn't make user ppp work and switched to kernel ppp and now my setup is working much better. I'd be happy to send you my configuration files if you want them. The problem I have is trying to get the kernel ppp to recognize and disconnect when its no longer getting any traffic from upstream. When it disconnects, I want it to automatically reconnect (I have a dedicated connection), but it seems to be taking about 3 hours for this whole cycle to complete. I have my NMBCLUSTERS=4096 set and am running 2.1 off the cd-rom. Mike
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