Dear SCO Customer,

Support Level Supplement (SLS) ptf7010d, the UnixWare 7 Networking inet
Driver, addresses these issues:

1. Heavy activity on a web server (Netscape or Apache) can cause
   the server process to hang. This SLS corrects the handling of
   incoming TCP connections.

2. A streams leak in the tcp driver which could result in process hangs
   was fixed.

3. Enhancement to provide gratuitous arp functionality (-i option).
   For complete support of gratuitous arp, ptf7084a must also be installed.

   The documentation for this new option is provided:

                                  arp(1Mtcp)

   -i interface_name target_ipaddr

          Send an ARP request, avoiding the cache, on the specified
          interface interface_name (for example, net0). In the
          broadcast request, the sender's IP address is that of the
          interface, the sender's hardware address (MAC address) is
          that of the interface, and the target IP address is that
          specified by target_ipaddr.

          On interfaces with aliased IP addresses (see
          ifconfig(1Mtcp)), a separate ARP request is broadcast for
          each alias address with the sender's IP address set to the
          alias address.  As generally used, the sender expects the
          host with the target IP address to respond with an ARP reply
          containing its hardware address.

          If the sender and target IP addresses are identical, a
          gratuitous ARP request is broadcast. This allows other
          hosts on the network to update their cache entries for the
          sender's IP address with the hardware address contained
          in the request. No reply is expected. If an interface has
          been configured with several alias IP addresses, a separate
          gratuitous ARP request must be issued for each IP address
          which needs to notify its corresponding hardware address to
          the network.


SLS ptf7010d contains:

        /etc/conf/pack.d/inet/Driver_atup.o
        /etc/conf/pack.d/inet/Driver_mp.o
        /usr/sbin/arp


Software Notes and Recommendations
----------------------------------

SLS ptf7010d should only be installed on:

        UnixWare 7.0.0 with the UnixWare 7 Release Supplement (uw7rs)

SLS ptf7084a must be installed before installing SLS ptf7010d.

SLS ptf7010d supersedes SLS ptf7010c, however it is not necessary
to remove ptf7010c prior to installing ptf7010d.


Installation Instructions
-------------------------

1. Download the ptf7010d.Z and ptf7010d.txt files to the /tmp directory on
   your machine.

2. As root, uncompress the file and add the SLS package to your system
   using these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7010d.Z
        # pkgadd -d /tmp/ptf7010d
        # rm /tmp/ptf7010d

3. Reboot the system after installing this SLS package. A warning and two
   notices about inet will be displayed on the screen before reboot. These 
   can be safely ignored.

The release notes displayed prior to installation can be found in:

        /var/sadm/pkg/ptf7010/install/ptf7010.txt


Removal Instructions
--------------------

1. As root, remove the SLS package using these commands:

        $ su
        Password: <type your root password>
        # pkgrm ptf7010

2. Reboot the system after removing this SLS package.

If you have questions regarding this SLS, or the product on which 
it is installed, please contact your software supplier.