Cisco IGX 8400 Series Switches

Revised November 27, 2006

October 9, 2003

NOTICE:

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Products Affected

Problem Description

After a rebuild or as software fallback, the IGX8400 remains in boot state when there is no device, such as a modem or terminal server attached to the Control port.

Background

Rebuilds may result when the IGX8400 runtime software experiences an abort and there is no available standby Network Processor Module (NPM) .

Runrev is a user initiated command used to switch the IGX8400 NPMs to a later version of software.

The IGX8400 hangs because of an anomaly in the boot code handling of the Data Terminal Ready (DTR) lead on the Control port.

Problem Symptoms

Network users will experience continued loss of connectivity to remote resources.

Network administrators will observe continued major alarms and unreachable node log events as well as inability to virtual terminal (VT) to the affected switch. Visually, all Light Emitting Diodes (LEDs) on the IGX will be red except for the "Active" LED on the active NPM which will be green.

The definite proof of this anomaly is that the node starts to boot up when a terminal, modem or terminal server which has DTR asserted is physically attached to the Control port. The node will resume operation normally without further intervention.

Workaround/Solution

Workaround 1:

Use the cnfterm command to disable DTR monitoring on the Control port.

Control port                           Auxiliary port
Baud Rate:           9600              Baud Rate:           9600
Parity:              None              Parity:              None
Number of Data Bits: 8                 Number of Data Bits: 8
Number of Stop Bits: 1                 Number of Stop Bits: 1
Output flow control: XON/XOFF          Output flow control: XON/XOFF
Input flow control:  XON/XOFF          Input flow control:  XON/XOFF
CTS flow control:    No                CTS flow control:    Yes
Use DTR signal:      No                Use DTR signal:      Yes

Last Command: cnfterm c 9600 none 8 1 x x no no
Next Command:

Workaround 2:

Attach a device to the Control Port that has the DTR lead asserted.

Solution:

A release of boot code for the NPM will resolve this problem. Return materials authorizations (RMAs) do not resolve this problem. NPM Bootcode Revision "T" is targeted to fix this issue.

DDTS

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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

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