Wwn Card Removal And Replacement; Time And Items Required - Brocade Communications Systems DCX Backbone Hardware Installation Manual

Table of Contents

WWN card removal and replacement

There are two WWN cards located beneath the WWN bezel (logo plate). As you are facing the bezel on the non-port-side of the chassis,

WWN 1 is located on the left side, and WWN 2 is on the right. Before replacing cards, refererence RASlog messages and use the WWN

Recovery Tool (wwnrecover) as directed in the following sections to recover WWN cards. The tool will direct you to contact customer

support if recovery fails. In these cases, Brocade Support will determine whether one or both WWN cards need replaced and will request

the partner or OEM to send WWN cards from FRU inventory to the nearest Brocade Support office to be reprogrammed.

This section provides information on RASlog messages indicating WWN card problems, the WWN Recovery Tool, and complete steps to

remove and replace WWN cards.

The following WWN card replacement procedures are available:

•

Hot-swap procedure. Use this procedure when replacing one WWN card only. This procedure is non-disruptive as a system

reboot is not required under most conditions.

NOTE

After replacing a WWN card using this procedure, RASlog messages EM-1220 or EM-1222 may indicate that a

discrepancy or mismatch is detected between the WWN cards. You must monitor messages for errors and warnings,

and then follow directions in messages to use wwnrecover for recovery . The wwnrecover tool may prompt you to

reboot the control processors (CP) if the system is running with invalid IP addresses because the system was booted

with a replacement card for WWN card 1.

•

System power-down procedure. Use this procedure when replacing both WWN cards. This procedure disrupts system

operations. Observe the following when replacing both WWN cards:

–

No additional reboot is required following card replacement after powering the system down.

–

If Brocade support has determined that both WWN cards need replaced, you must power-down the chassis, and then

replace both WWN cards as a matched pair.

–

Be aware that if replacing both WWN cards, the IP addresses on the new WWN cards will be in effect when the chassis

powers up. If these IP addresses are different from the previous cards, then you will not be able to establish ssh or other

sessions that use the previous IP addresses. You can change IP addresses on the new cards using the ipaddrset

command.

NOTE

If replacing the chassis, you do not need to remove WWN cards from chassis as they ship with replacement chassis.

Time and items required

If there is a need to replace one or both WWN cards, allow approximately 20 minutes. Refer to

Verifying the need for replacement

The following items are needed to replace the WWN cards:

•

Electrostatic discharge (ESD) grounding strap

•

#2 Phillips screwdriver (required only for some versions of the WWN card)

•

If a serial console session is used: serial cable and a workstation computer with a terminal emulator application (such as

HyperTerminal for Windows systems or TIP for Solaris systems)

Brocade DCX Backbone Hardware Installation Guide

53-1000685-24

on page 106 before replacement.