From owner-freebsd-stable  Thu Dec 23 14:55:17 1999
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Date: Thu, 23 Dec 1999 14:55:13 -0800 (PST)
From: Scott Michel <scottm@CS.UCLA.EDU>
Message-Id: <199912232255.OAA00872@mordred.cs.ucla.edu>
To: freebsd-current@freebsd.org, freebsd-stable@freebsd.org
Subject: TCP Oddities followup
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As I'd recently posted on -current, I've been noticing TCP oddities in
3.3 and 3.4. I've got a pn card (NetGear FA310tx) and a few new things
to report:

- Invariably, a TCP connection will freeze with something in the send
  queue. Connections don't freeze even if there's something in the
  receive queue.

- tcpdump-ing the pn0 interface shows that the host thinks that it's
  sending data. tcpdump-ing elsewhere in the network shows that pn0
  isn't actually transmitting anything into the wire.

- This really is a TCP or interface bug because NFS connections don't
  freeze using UDP.

- Other TCP connections continue to operate (like a cvsup in the
  background)

I haven't stared at the if_pn.c code all that closely but I'm willing
to entertain debugging suggestions.


-scooter


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