May 13, 1998
Bug Details
To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.
View bug details for CSCdj01522 (registered customers only) .
Products Affected
IGX ATM Line Module B (ALM/B)
Problem Description
The IGX-ALM/B loaded with firmware C.B.C or earlier causes frames of 6 bytes or less to be discarded when traversing ALM/B trunks.
Problem Symptoms
The symptoms include frame discards (use the dspchstats <slot.port.dlci> and dspportstats <slot.port> commands to observe discards), failed links on SNA connections, data links that come up and then drop, and other types of data discontinuities.
Workaround/Solution
Solution
The solution is to upgrade the firmware on the IGX-ALM/B to support short frame sizes. The correct firmware to load on the IGX-ALM/B is C.B.D or later.
Workaround
The workaround is to route protocols using frames shorter than 6 bytes over network trunk modules (NTMs).
Recommendation
Obtain the ALM/B firmware from CCO by visiting URL: http://www.cisco.com. Use your CCO account User ID and password to log in, go to Software and Support, then to the Software Center. Download ALM/B firmware version C.B.D or later.
Related Field Notice
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:
Receive Email Notification For New Field Notices
Product Alert Tool - Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.