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From: tcp-ip@ucbvax.ARPA
Newsgroups: fa.tcp-ip
Subject: Re:  Apparent problem with ICMP Redirects on 4.2 systems
Message-ID: <8478@ucbvax.ARPA>
Date: Tue, 25-Jun-85 12:49:33 EDT
Article-I.D.: ucbvax.8478
Posted: Tue Jun 25 12:49:33 1985
Date-Received: Wed, 26-Jun-85 07:02:38 EDT
Sender: daemon@ucbvax.ARPA
Organization: University of California at Berkeley
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From: Bob Walsh 


The Berkeley 4.2 TCP does not reroute current connections when it receives
an ICMP redirect.  As a result, such a machine can receive a lot of
redirects for the duration of those current connections.  The UNIX host
does not have a fixed size routing table; the table (at least in the kernel,
I'm not sure about the routing demon) grows as needed and is implemented
by an open chained hash table.  This, and some other problems with the 
distributed 4.2 TCP are described in a paper I gave at the Salt Lake City
USENIX in '84.

bob walsh