Path: utzoo!attcan!uunet!husc6!uwvax!rutgers!ucsd!ucbvax!techunix.BITNET!melman
From: melman@techunix.BITNET (David Melman)
Newsgroups: comp.unix.wizards
Subject: Kernel out of buffers
Message-ID: <6958@techunix.BITNET>
Date: 27 Dec 88 15:20:59 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: melman%techunix.bitnet@jade.berkeley.edu (David Melman)
Organization: Technion, Israel Inst. Tech., Haifa Israel
Lines: 17

We have a ethernet with many different machines running various versions of
Unix and other operating systems.  Our host, a Vax 785 running 4.3BSD with
original TCP/IP code, usually communicates with the net without problems.

However recently, with random occurances (from once a week to three
times a day), a situation arises where every attempt to access the net
results in a failure with the message: "No buffer space available".

When this situation occurs, the machine is completely cut off to the net and
is cleared only by a reboot.  This has occurred on other hosts running 4.3BSD
and Mt. XINU on the lan as well.  Interestingly enough, a 'netstat -m'
shows there are plenty of mbufs available.  What is happening?

Thanks in advance for suggestions to overcome this problem.

David
melman@technunix.BITNET