Patch Name:  PHNE_5613

Patch Description: s300_400 9.03 9.10 Ping Pong ACK fix

Creation Date: 95/05/30

Post Date:  95/06/13

Hardware Platforms - OS Releases:
        s300_400: 9.03 9.10

Products: N/A

Filesets:
        NETINET

Automatic Reboot?: Yes

Status: General Release

Critical: No

Path Name:  /hp-ux_patches/s300_400/9.X/PHNE_5613

Symptoms:
        PHNE_5613:
        TCP connection loss even though there are not network
        problems.  Heavy network load consisting of only ACKs.
        (Ack Storm).

Defect Description:
        PHNE_5613:
        This problem occurs when the connections deadlock because
        they erroneously drop ACK packets that contain valid
        information.
        This problem was originally reported when an X.25 line was
        used for a TCP connection between systems.

SR:
        5003230730 5003265470

Patch Files:  
        /etc/conf/libinet.a(tcp_input.o)

what(1) Output:
        /etc/conf/libinet.a(tcp_input.o):
                PATCH_9.03/9.10: tcp_input.o 1.81.83.8 95/05/30 PHNE
                        _5613

sum(1) Output:
        46364 30 /etc/conf/libinet.a(tcp_input.o)

Patch Conflicts: None

Patch Dependencies:  None

Hardware Dependencies:  None

Other Dependencies:  None

Supersedes:  None

Equivalent Patches:
        PHNE_4918:
        s300_400: 8.00

Patch Package Size:  70 Kbytes

Installation Instructions:  
        Please review all instructions and the Hewlett-Packard
        SupportLine User Guide or your Hewlett-Packard support terms
        and conditions for precautions, scope of license,
        restrictions, and, limitation of liability and warranties,
        before installing this patch.
        ------------------------------------------------------------
        1. Back up your system before installing a patch.

        2. Copy the patch to your /tmp directory and unshar it:

                cd /tmp
                cp patch_source/PHNE_5613 .
                sh PHNE_5613

        3. Become root and run update:

                /etc/update

        4. Use the cursor keys to select "Change Source or
           Destination ->" and press [Return].

        5. Select "From Tape Device to Local System ..."
           in the Change window and

        6. Change "Source: /dev/rmt/0m" to
           "Source: /tmp/PHNE_5613.updt"

        7. Press "Done" (f4).

        8. Follow the standard directions for update.

        Update moves the original software to
        /system/PHNE_5613/orig.  Keep this file to recover from any
        potential problems.  You should move the .text file to
        /system/PHNE_5613 for future reference.

        To put this patch on a magnetic tape and update from the
        tape drive, use dd:

                dd if=PHNE_5613.updt of=/dev/rmt/0m bs=2048

Special Installation Instructions:  None