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Path: utzoo!watmath!clyde!rutgers!lll-lcc!ames!ucbcad!ucbvax!THINK.COM!bruce
From: bruce@THINK.COM.UUCP
Newsgroups: mod.protocols.tcp-ip
Subject: HDH timeouts / NSF.ARPA
Message-ID: <8702210659.AA02578@erato.Think.COM>
Date: Sat, 21-Feb-87 01:59:53 EST
Article-I.D.: erato.8702210659.AA02578
Posted: Sat Feb 21 01:59:53 1987
Date-Received: Sat, 21-Feb-87 16:49:28 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 17
Approved: tcp-ip@sri-nic.arpa

Starting 2 or 3 days ago, we have been experiencing a very weird
problem.  We (Think.COM, 10.4.0.6) are getting hdh timeouts (resulting
in a hung interface) every time we try to communicate with one
particular host, NSF.ARPA (10.9.0.20).

If we ping (ICMP echo) them with 56 data bytes, everything is OK.  If
we try to ping them with 100 data bytes (or more), we get hdh
timeouts.  Probably has something to do with crossing the 128-byte
frame length.

We are running HDH in packet mode with ACC IF-11/HDH unibus interface.
No problems talking to any other hosts.

Any ideas or similar problems?  This has been reported to NOC as SR#8700483.
Didn't I read here that new HDH code was installed on the PSNs recently?

--bruce