==========================================================================
The checksum's (found through sum -r) of the files that you have received
(other than this README) are as follows:

09579     33 patchSG0005416.idb
52293  16481 patchSG0005416.eoe_sw
20741      4 patchSG0005416
03290   1219 patchSG0005416.FDDIXPress_sw
==========================================================================



				  - 1 -



       1.  Patch_SG0005416_Release_Note

       This release note describes patch SG0005416 to IRIX 6.5.21f.

       Patch SG0005416 does not	replace	any other patches.

       1.1  Supported_Hardware_Platforms

       This patch contains bug fixes for all hardware platforms.


       1.2  Supported_Software_Platforms

       This patch contains bug fixes for IRIX 6.5.21f. The software
       cannot be installed on other configurations.

       1.3  Bugs_Fixed_by_Patch_SG0005416

       This patch contains fixes for the following bugs	in IRIX
       6.5.21f.	 Bug numbers from Silicon Graphics bug tracking
       system are included for reference.

       Patch SG0005416 fixes:

	 Bug #773203-Performance: fix sbappend*	family of functions

	 Bug #890567-ifconfig "-arp" argument does not disable arp
	 requests being	sent or	received

	 Bug #890690-IPv6 TCP does not randomize the ISN/ISS when
	 systune tcpiss_md5 is set

	 Bug #894910-IP	fragment reassembly may	reassemble packets
	 incorrectly

	 Bug #897696-slow network on TRIX for tigon3

	 Bug #897747-Changing mtu via ifconfig on UP tg	interfaces
	 doesn't work

	 Bug #897764-throttling	network	interrupts to limit non-
	 network consequences of network DoS

	 Bug #901074-tg	interface hang in tg_xreset() when shutting
	 down

	 Bug #902072-arp DOS vulnerability

	 Bug #904631-837498 introduces a regression for	non-
	 _XOPEN_SOURCE recvmsg()












				  - 2 -



	 Bug #905160-we	can fail to send FIN and flush send queue
	 for TCP socket	w/ IPv6


       1.4  Subsystems_Included_in_Patch_SG0005416

       This patch release includes these subsystems:

	  o patchSG0005416.eoe_sw.base

	  o patchSG0005416.eoe_sw.ipv6

	  o patchSG0005416.eoe_sw.kdebug

	  o patchSG0005416.eoe_sw.svr4net

	  o patchSG0005416.FDDIXPress_sw.FDDIXPress


       1.5  Installation_Instructions

       Because you want	to install only	the patches for	problems
       you have	encountered, patch software is not installed by
       default.	 After reading the descriptions	of the bugs fixed
       in this patch (see Section 1.3),	determine the patches that
       meet your specific needs.

       If, after reading Sections 1.1 and 1.2 of these release
       notes, you are unsure whether your hardware and software
       meet the	requirements for installing a particular patch,	run
       inst.  The inst program does not	allow you to install
       patches that are	incompatible with your hardware	or
       software.

       Patch software is installed like	any other Silicon Graphics
       software	product.  Follow the instructions in your Software
       Installation Administrator's Guide to bring up the miniroot
       form of the software installation tools.

       Follow these steps to select a patch for	installation:

	 1.  At	the Inst> prompt, type

	     install patchSGxxxxxxx

	     where xxxxxxx is the patch	number.

	 2.  Initiate the installation sequence. Type

	     Inst> go












				  - 3 -



	 3.  You may find that two patches have	been marked as
	     incompatible.  (The installation tools reject an
	     installation request if an	incompatibility	is
	     detected.)	 If this occurs, you must deselect one of
	     the patches.

	     Inst> keep	patchSGxxxxxxx

	     where xxxxxxx is the patch	number.

	 4.  After completing the installation process,	exit the
	     inst program by typing

	     Inst> quit



       1.6  Patch_Removal_Instructions

       To remove a patch, use the versions remove command as you
       would for any other software subsystem.	The removal process
       reinstates the original version of software unless you have
       specifically removed the	patch history from your	system.

       versions	remove patchSGxxxxxxx

       where xxxxxxx is	the patch number.

       To keep a patch but increase your disk space, use the
       versions	removehist command to remove the patch history.

       versions	removehist patchSGxxxxxxx

       where xxxxxxx is	the patch number.

       1.7  Known_Problems