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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

Using wwnrecover 7.4

on page 106 and

Verifying the need for replacement

on page 106 before 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)

WWN card removal and replacement

Brocade DCX Backbone Hardware Installation Guide

53-1000685-24

105