Field Notice: FN - 64068 - N7000: M2 and F2 Line Card Reset Due to EOBC Heartbeat Failure - Software Upgrade Recommended

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.

Revision History

Revision	Publish Date	Comments
1.0	31-Jan-17	Initial Release
10.0	12-Oct-17	Migration to new field notice system

Products Affected

Affected Product ID	Comments
N77-F248XP-23E	NX OS versions earlier than 6.2(14)
N7K-F248XP-25	NX OS versions earlier than 6.2(14)
N7K-F248XP-25E	NX OS versions earlier than 6.2(14)
N7K-F248XT-25E	NX OS versions earlier than 6.2(14)
N7K-M202CF-22L	NX OS versions earlier than 6.2(14)
N7K-M206FQ-23L	NX OS versions earlier than 6.2(14)
N7K-M224XP-23L	NX OS versions earlier than 6.2(14)
N7K-SM-NAM-9G-K9	NX OS versions earlier than 6.2(14)

Defect Information

Defect ID	Headline
CSCus73066	M2/F2 linecard reset due to EOBC heartbeat failure

Problem Description

The M2, F2, and NAM line cards, as listed in the Products Affected section, might be reset by the Supervisor due to the Ethernet Out of Band Channel (EOBC) heartbeat that is missed by the line card. This EOBC heartbeat communication, which consists of diagnostic and system management signals, is essential for the line card to function properly.

Background

In scenarios where customers run NX OS versions earlier than Version 6.2 (14), there are communication issues between the Supervisor and the M2, F2, and NAM line cards where heartbeats go missing between the full duplex Gigabit link. This EOBC heartbeat communication, which consists of diagnostic and system management signals, is essential for the M2, F2, and NAM line cards to function properly.

Problem Symptom

This system error code shows the "EOBC heartbeat failure" message.

exception information --- exception instance 4 ----

Module Slot Number: 3

Device Id : 10

Device Name : eobc

Device Errorcode : 0xc0a0114f

Device ID : 10 (0x0a)

Device Instance : 01 (0x01)

Dev Type (HW/SW) : 01 (0x01)

ErrNum (devInfo) : 79 (0x4f)

System Errorcode : 0x4042004e EOBC heartbeat failure

Error Type : Warning

PhyPortLayer : Ethernet

Port(s) Affected :

DSAP : 0 (0x0)

UUID : 0 (0x0)

Time : Sun Dec 28 01:34:28 2014

(Ticks: 549F33F4 jiffies)

OR

Check the module's internal activity logs. For example, enter the show module internal activity module [slot number] command.

Near the time when the linecard is reloaded, you might see events in the model's internal activity logs such as follows:

Warning on ports: 1-0 due to EOBC heartbeat failure in device 10

Workaround/Solution

Customers should upgrade the NX OS software to Version 6.2 (14) or later. No Return Material Authorization (RMA) is required.

Dual Supervisor Modules - This Upgrade Procedure Summary describes how to upgrade a device that has dual supervisor modules to the latest Cisco NX-OS software.

Single Supervisor Module - This Upgrade Procedure Summary describes how to upgrade a device that has a single supervisor module to the latest Cisco NX-OS software.

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:

• Open a service request on Cisco.com
• By email
• By telephone

Receive Email Notification For New Field Notices

Cisco Notification Service—Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.