53-1002177-19 Hardware Installation Guide
Brocade DCX 8510-4 Backbone Hardware Installation Guide
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 and
Verifying the need for replacement 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)
Using the wwnrecover utility
The wwnrecover utility permits a recovery of WWN card data in the event of corruption. Recovery is not possible if
hardware issues prevent access to either WWN card or if the primary and backup copy of the license ID on either card is
corrupted. This utility is not available in Fabric OS prior to v7.4.0.
Identical data must be maintained on each WWN card at all times so that if one card fails, the system can use the other
card to provide valid system operation. To maintain data and ensure its integrity, the audits both WWN cards one hour
after the first system boot-up, every 24 hours after boot-up, and any time a WWN card is inserted to compare the critical
data.
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