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Cisco Catalyst 5000 Series Switches

Field Notice: FN - 4 - Catalyst 5000 FDDI Module


February 5, 1997


NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Products Affected

Software Releases 2.1(2) - 2.1(5)

Problem Description

Cisco Systems Inc. has discovered a software defect with the FDDI Module in software releases 2.1(2) through 2.1(5).

Under certain configurations, customers may experience problems when copying large packets between the FDDI and Ethernet segments. The defect is documented in CSCdi73487 and has been resolved in the FDDI interim release 2.1(623) as well as the 2.1(6) maintenance release.

The specific problem has been seen when large FDDI Packets (greater then 1500 bytes) are fragmented into 1500 segments to meet the maximum frame size of 802.3/Ethernet. The last packet is not being rounded up to the smallest allowable 802.3/Ethernet frame size, which results in a runt packet being introduced into the segment.

If you believe you may be experiencing this problem, download the Catalyst 5000 FDDI Interim Release 2.1(623) from the Workgroup Section of the CCO Software Center (registered customers only) . The specific file to download is: fddi_2.1.623.bin.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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