Recovery Procedure For Downgrading To Fabric 2 Modules From Fabric 3 Modules - Cisco Nexus 7710 Site Preparation And Hardware Installation Manual

Table of Contents

Installing or Replacing Modules, Fan Trays, and Power Supplies

switch# show module xbar

Xbar Ports

Module-Type

---

-----

----------------------------------- ------------------ ----------

Fabric Module 3

Xbar Sw

---

---------------

Xbar MAC-Address(es)

---

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* this terminal session

Step 4

If one or more of the fabric modules is indicated as "Fabric Module 2," repeat Step 2 to replace the Fabric 2 module with

the Fabric 3 module and then repeat Step 3 to display the types of fabric modules installed in the fabric slots.

Recovery Procedure for Downgrading to Fabric 2 Modules from Fabric 3

Modules

This section describes the steps needed to downgrade from Fabric 3 modules to Fabric 2 modules if there are

issues with the Fabric 3 upgrade.

Scenario 1

If both Fabric 2 and Fabric 3 modules are up in the switch (FAB2_FAB3 mode), then replace the Fabric 3

modules with the Fabric 2 modules.

Scenario 2

If the switch is loaded with Fabric 3 modules only (FAB3 mode), then migrating to Fabric 2 is disruptive.

The Fabric 2 module will power down when the switch is in FAB3 mode.

Perform the steps given below to replace FAB3 modules with FAB2 modules when the switch is loaded with

only FAB3 modules:

Step 1

Replace one FAB3 module with a FAB2 module. The switch is still in FAB3 mode.

Step 2

The FAB2 module will be in power down state.

Step 3

Repeat Step 1 to replace FAB3 modules with FAB2 modules in all slots until a single FAB3 module is remaining in the

switch.

Step 4

Remove the last FAB3 module. The I/O modules will be powered down due to non-availability of Stage2 bandwidth.

Step 5

Insert a FAB2 module in the slot from which the last FAB3 module was removed. This FAB2 module will power up and

all the I/O modules will also power up in FAB2 mode.

OL-30452-01.