NOVELL TECHNICAL INFORMATION DOCUMENT

TITLE:  NIP319.EXE; Broadcast Storm patch for NWIP1.1
README FOR:  NIP319.EXE

NOVELL PRODUCTS and VERSIONS:
NetWare/IP 1.1

ABSTRACT:

NIP319.exe contains a new NWIP.NLM (6/26/96) for owners of NetWare IP 1.1. 
This new NWIP.NLM protects against Broadcast Storms.  Do NOT apply this patch
to NetWare IP 2.x servers!


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 DISCLAIMER
 THE ORIGIN OF THIS INFORMATION MAY BE INTERNAL OR EXTERNAL TO NOVELL.  NOVELL
MAKES EVERY EFFORT WITHIN ITS MEANS TO VERIFY THIS INFORMATION.  HOWEVER, THE
INFORMATION PROVIDED IN THIS DOCUMENT IS FOR YOUR INFORMATION ONLY.  NOVELL
MAKES NO EXPLICIT OR IMPLIED CLAIMS TO THE VALIDITY OF THIS INFORMATION.
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SYMPTOM:

A "Broadcast Storm".


CAUSE

If an incoming packet was from a local IPX broadcast and not a SAP or RIP,
NetWare IP gave the packet to the NetWare OS.   However, when the NetWare OS
determined that the destination (the NWIP client) did not reside on the same
server, it had routed the packet to the NWIP server module, and the NWIP server
in turn, sent it to the TCPIP network (thinking it is a point to point packet). 
All servers that received the packet did the same thing (ie. received the UDP
broadcast and send it back out as broadcast).

SOLUTION: 

Install NIP319.
 The NWIP.NLM in NIP319 provides more checking of incoming packets so that only
"real" broadcast packets will be given to the NetWare Operating System.  In
addition, the "receive packet misc errors" counter is increased.

Self-Extracting File Name: nip319.exe

Files Included     Size     Date      Time

..\
      NIP319.TXT     (This file)
        NWIP.NLM          150358         6-26-96      5:23:58 pm


Installation Instructions:

1. Change the name of "old" NWIP.NLM (so you will have it, in case there is a
problem).

 2. Copy the new NWIP.NLM to where old one was.


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