Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!ucbvax!JAGUAR.ESS.HARRIS.COM!WELDEN
From: WELDEN@JAGUAR.ESS.HARRIS.COM
Newsgroups: comp.protocols.tcp-ip
Subject: Congestion AVoidance Help Needed
Message-ID: <9106012137.AA20860@ucbvax.Berkeley.EDU>
Date: 31 May 91 23:31:54 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The Internet
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From:	JUNGLE::WELDEN       31-MAY-1991 15:49:07.56
To:	EXOS%"tcp-ip@nic.ddn.mil"
CC:	WELDEN
Subj:	Congestion Avoidance Help Needed


                CONGESTION AVOIDANCE WHEN ICMP CAN'T BE USED
                ********************************************

I need feedback views and experience for a network situation we are facing in
using the TCP/IP protocols in a secure application.

Hosts on IEEE 802.3 LANs connect to a Packet Encryption Device and then by an
IEEE 802.3 LAN to an IP Router and then out into a WAN to the reverse set of
eomponents. The Packet Encryption Device will be a NSA approved item and will
create a barrior between the Hosts and the IP Router. 

When congestion starts in the WAN the IP Router would normally generate an ICMP
Source Quench packet to be sent back to the source Host but the Packet Encryp-
tion Device blocks it.

I need to know if anyone else has experienced this situation and/or what solid
recommendations ca be made. We feel we must be able to slow down selected sourceHosts in order to manage congestion avoidance in the network.

Please reply to:

                welden@jaguar.ess.harris.com

Walter Elden
Harris Corp-GCSD
Melbourne, FL
407/729-3661       407/729-2855  FAX