HP FDDI 9000 FDDI/9000 EISA Adapter Release Notes - Page 18

Table 1-3 FDDI/9000 EISA Adapter Release Notes Patches and Fixes in Version B.10.20.11 PHNE_17061 (Continued) Symptom Defect 3. High checksum errors and degraded network performance, observed over EISA FDDI interface, on B and d class systems which are non-cache coherent I/O (that is, CCIO). 3. On systems without CCIO support, the driver needs to maintain cache coherency during DMA transactions, by flushing/purging the CPU cache as necessary. The EISA FDDI driver did not synchronize its inbound data buffer pool with the processor cache. Hence, stale data was passed up to the upper layers, resulting in checksum errors and re-transmissions, leading to degraded performance. To verify this problem, run netstat(1M) to display bad checksum. In addition, t check if the system supports CCIO, run the following command on the system: /usr/bin/grep "^ccio" /stand/system 4. When OSI stack is configured on top of EISA FDDI interface it fails to communicate with its peers, resulting in application aborts. 5. System panics during system shutdown when OSI stack is configured over EISA FDDI driver. 4. The control field in the packet header of outbound Unnumbered Information (UI) packets in the EISA FDDI driver was not initialized. As a result, communication was not established with remote hosts, causing application aborts. 5. During system shutdown, the OSI stack sends the OSIUNBIND request to the driver. The driver failed to unbind the protocol stack stream as it incorrectly compared the service access pooling (SAP) values and returned and error. However, the OSI stack was unbound and any attempt by the driver to send packets on that stream resulted in a system panic. 18 Chapter 1