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Cisco ONS 15454 Series Multiservice Provisioning Platforms

ONS15454 G1000-4 Card Ports Provisioned with an STS-24c Circuit May Cause CRC Errors


April 17, 2003



Products Affected

Product

Top Assembly

Printed Circuit Assembly

Part Number

Rev.

Part Number

Rev.

15454-G1000-4

15454-G1000-4=

800-08578-02

B0

73-5561-07

C0

Problem Description

CRC errors on G1000-4 cards when egress SONET payloads are greater than Gigabit Ethernet line rates (1.0 Gbps).

Background

With the introduction of the ML1000-2 card it is now possible to create SONET circuits with full utilization above Gigabit Ethernet line rate (the STS-24c has a 1.24 Gbps payload capacity). When such a payload is cross connected to the G1000-4 card for sustained periods, the G1000-4 card frame buffers fill up and can ultimately lead to CRC errors because of the limitation in the G1000-4 hardware.

Problem Symptoms

CRC errors experienced on Gigabit Ethernet client interfaces.

Workaround/Solution

Avoid using SONET traffic greater that 1 Gbps line rate or STS24c when using more than one circuit. There is no problem with the STS-24c circuits. The issue is caused by the limitation of this card. This has been fixed with an upgrade to the FPGA in the G1K-4 card.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCdy02928 (registered customers only)

G1000 problem with sonet traffic greater than GIGE line rate.

This DDTS also applies to a field notice for the ONS 15327. That field notice can be found here.

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: