Dear SCO Customer, The enclosed Support Level Supplement (SLS) PTF3111, the LLC Src and Dest SAP Decoupler Supplement, installs updated ODI drivers that correct a problem with Logical Link Controller (LLC) communications between two nodes using different Source (SSAP) and Destination (DSAP) SAP values. Previously, the LSL ODI module used the SSAP value in the DSAP field of the LLC header. This resulted in coupling the SSAP and DSAP values and prohibiting the use of the user-specified DSAP value in the header. The drivers installed with SLS PTF3111 provide corrections which affect 802.2 frames transmitted on Ethernet, FDDI and Token-Ring networks. The DSAP value is stored independently of the SSAP value and is used as part of the LLC information. Software Notes and Recommendations ---------------------------------- PTF3111 should only be installed on these releases: SCO UnixWare Application Server Release 2.1.0 SCO UnixWare Application Server Release 2.1.1 SCO UnixWare Application Server Release 2.1.2 SCO UnixWare Personal Edition Release 2.1.0 SCO UnixWare Personal Edition Release 2.1.1 SCO UnixWare Personal Edition Release 2.1.2 Installation Instructions ------------------------- 1. Become root and create a new directory by typing the following: $ su Password: # mkdir /tmp/pkg # chmod 700 /tmp/pkg # cd /tmp/pkg 2. Download the ptf3111.Z and the ptf3111.txt files to the newly created /tmp/pkg directory on your machine. 3. Read the Release Notes contained in the ptf3111.txt file. 4. Uncompress the file and add the package to your system using these commands: # uncompress /tmp/pkg/ptf3111.Z # pkgadd -d /tmp/pkg/ptf3111 5. Reboot the system after installing this SLS. Removal Instructions --------------------- 1. Become root and remove the package by typing these commands: $ su Password: # pkgrm ptf3111 2. Reboot the system after removing this SLS. If you have questions regarding this SLS, or the product on which it is installed, please contact your software supplier. We appreciate your business. SCO Support Services