Re: Weird "ignoring syn" problem

2007-06-25 Thread David Cornejo
At 08:27 AM 6/25/2007, Bill Moran wrote: In response to Bill Moran <[EMAIL PROTECTED]>: > In response to Adam McDougall <[EMAIL PROTECTED]>: > > > On Tue, Jun 12, 2007 at 10:19:49AM -0400, Bill Moran wrote: > > > > > > This one has got me pretty befuddled. > > > > We're seeing some really od

Re: Weird "ignoring syn" problem

2007-06-25 Thread Bill Moran
In response to Bill Moran <[EMAIL PROTECTED]>: > In response to Adam McDougall <[EMAIL PROTECTED]>: > > > On Tue, Jun 12, 2007 at 10:19:49AM -0400, Bill Moran wrote: > > > > > > This one has got me pretty befuddled. > > > > We're seeing some really odd behaviour with FreeBSD ignoring S

Re: Weird "ignoring syn" problem

2007-06-13 Thread Bill Moran
In response to Adam McDougall <[EMAIL PROTECTED]>: > On Tue, Jun 12, 2007 at 10:19:49AM -0400, Bill Moran wrote: > > > This one has got me pretty befuddled. > > We're seeing some really odd behaviour with FreeBSD ignoring SYN packets. > I've been trying to diagnose this for a couple o

Re: Weird "ignoring syn" problem

2007-06-12 Thread Andre Oppermann
David Cornejo wrote: This may not be related, but I have a Soekris 4801 running CURRENT that with a GENERIC kernel exhibits the behavior where TCP connects don't happen. If I switch to an old kernel config file, it works.. This failure happens between this box and a RELENG_6 (updated last we

Re: Weird "ignoring syn" problem

2007-06-12 Thread David Cornejo
This may not be related, but I have a Soekris 4801 running CURRENT that with a GENERIC kernel exhibits the behavior where TCP connects don't happen. If I switch to an old kernel config file, it works.. This failure happens between this box and a RELENG_6 (updated last week), another CURRENT b

Re: Weird "ignoring syn" problem

2007-06-12 Thread John-Mark Gurney
Bill Moran wrote this message on Tue, Jun 12, 2007 at 13:13 -0400: > > b) you may run out of socket on the client side and reuse them > > too fast. Try to lower net.inet.ip.portrange.first to 30,000 > > or so. > > I find that unlikely. The problem usually occurs reliably after less >

Re: Weird "ignoring syn" problem

2007-06-12 Thread Adam McDougall
On Tue, Jun 12, 2007 at 10:19:49AM -0400, Bill Moran wrote: This one has got me pretty befuddled. We're seeing some really odd behaviour with FreeBSD ignoring SYN packets. I've been trying to diagnose this for a couple of weeks now, and my current guess is that there's something wron

Re: Weird "ignoring syn" problem

2007-06-12 Thread Bill Moran
In response to Andre Oppermann <[EMAIL PROTECTED]>: > > Before we go into more detail: > > a) the em(4) driver is most likely totally unrelated to this Are you saying it's more likely to be a tcp stack problem? As an experiment, I tried to reproduce it over the loopback and was unable to, whi

Re: Weird "ignoring syn" problem

2007-06-12 Thread Andre Oppermann
Bill Moran wrote: This one has got me pretty befuddled. We're seeing some really odd behaviour with FreeBSD ignoring SYN packets. I've been trying to diagnose this for a couple of weeks now, and my current guess is that there's something wrong with the em driver. Here's a narrowed down list of

Re: Weird "ignoring syn" problem

2007-06-12 Thread Bill Moran
Brief update to add another item to the list of things I've tried: *) The problem occurs whether the em device is polling or not. In response to Bill Moran <[EMAIL PROTECTED]>: > > This one has got me pretty befuddled. > > We're seeing some really odd behaviour with FreeBSD ignoring SYN packets.

Weird "ignoring syn" problem

2007-06-12 Thread Bill Moran
This one has got me pretty befuddled. We're seeing some really odd behaviour with FreeBSD ignoring SYN packets. I've been trying to diagnose this for a couple of weeks now, and my current guess is that there's something wrong with the em driver. Here's a narrowed down list of what I've ruled out