Preparing For Wwn Card Replacement; Hot-Swap Replacement - Brocade Communications Systems DCX Backbone Hardware Installation Manual

NOTE
In the event of an EM-1220 or EM-1222 error message due to WWN card data corruption or data mis-matches across WWN
cords, data recovery may be possible using the wwnrecover utility. For more information on using this utility, refer to
wwnrecover on page 106.

Preparing for WWN card replacement

If the WWN cards require replacement, complete the following steps. Follow electrostatic discharge (ESD) precautions.
DANGER
For safety reasons, the ESD wrist strap should contain a series 1 megaohm resistor.
1. Open a Telnet session to the chassis and log in to the active CP as admin. The default password is "password".
2. Verify that you are logged in to the active CP. Run the haShow command to determine the active CP.
3. Run the supportSave command on the active CP to capture all settings. These settings will be referenced to verify the settings
have been correctly programmed after WWN replacement.
4. Contact Brocade Technical Support for replacement of WWN cards. Brocade Support will request the partner or OEM to send
WWN cards from FRU inventory to the nearest Brocade Support office to be reprogrammed. Brocade Support will require the
Supportsave data taken in the previous step so that the replacement cards can be reprogrammed prior to shipping to the
partner or your site. 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.
NOTE
Do not execute the frureplace command. The command will no longer be functional beginning with the release of
Fabric OS 7.0.0c, but users with earlier versions of the Fabric OS should also not run the command.

Hot-swap replacement

You may replace one WWN card with the system powered on using the following steps to avoid interruption of system operation.
Use this procedure if Brocade Customer Support has determined that a WWN card needs replaced and you have received replacement
cards. These procedures require use of the wwnrecover utility. For more information on this utility, refer to
106.
You can use this procedure to replace one WWN card at a time while power is on. Follow all steps for one card, and then repeat the same
steps to replace the other card. To replace both WWN cards simultaneously, use procedures under
108.
1. Remove the defective WWN card using procedures under
applicable to hot-swap replacement of WWN cards.
NOTE
Do not use steps in the WWN card and WWN bezel removal procedures to disable logical switches and power down the
chassis.
Removing a WWN card will result in RASlog messages indicating that a WWN card cannot be detected. Since the system will be
in a degraded state, install a WWN card as soon as possible.
2. Install the replacement WWN card into the empty slot.
When replacing cards, hold each card by the edges and insert the WWN cable onto the WWN module until the cables are fully
seated.
Brocade DCX Backbone Hardware Installation Guide
53-1000685-24
Removing the WWN card and WWN bezel (logo plate)
WWN card removal and replacement
Using wwnrecover on page
Power-down replacement
on page 110
Using
on page
107