Technical Information Document
NIP319.EXE; Broadcast Storm patch for NWIP1.1 - TID2909996 (last modified 09JUL1996)
2909996 2909996
associated file

Click filename to download:
nip319.exe; 69020 bytes; Date/Time: 07-09-1996/09:36AM
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!

installation

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.

symptoms

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).

solutions

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.

contents 

Self-Extracting File Name:  nip319.exe

Files Included       Size   Date         Time    Version   Checksum

\
    NIP319.TXT       2330   07-09-1996   09:35AM
      NWIP.NLM     150358   06-26-1996   05:23PM
Document Title: NIP319.EXE; Broadcast Storm patch for NWIP1.1
Document ID: 2909996
Creation Date: 09JUL1996
Modified Date: 09JUL1996
Document Revision: 1
Novell Product Class: Connectivity Products
Novell Product and Version: IP & TCPIP

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