Brocade Communications Systems 53-1001763-02 사용자 설명서

Firmware download process overview

9

In most cases, you will be upgrading firmware; that is, installing a newer firmware version than the 
one you are currently running. However, some circumstances may require installing an older 
version; that is, downgrading the firmware. The procedures in this section assume that you are 
upgrading firmware, but they work for downgrading as well, provided the old and new firmware 
versions are compatible. Always reference the latest release notes for updates that may exist 
regarding downgrades under particular circumstances.

For details on Administrative Domains and the firmware download process, see 

 for more information.

For details about testing and restoring firmware, see 

 on page 204.

Considerations for FICON CUP environments

To prevent channel errors during nondisruptive firmware installation, the switch CUP port must be 
taken offline from all host systems. 

HA sync state

High availability (HA) synchronization occurs when two CPs in an enterprise-class platform are 
synchronized. This state provides redundancy and a non-disruptive firmware download. In order for 
a firmware download to successfully occur, the two CPs in an enterprise-class platform must be in 
sync. 

If the CPs have mixed versions when you enter the firmwareDownload command, the CPs may not 
be in HA sync. In this case, you need to enter the firmwareDownload –s command first to upgrade 
or downgrade the standby CP to the same level as the active CP first, and then upgrade the CPs to 
the desired version of firmware. 

NOTE
You should not run mixed firmware levels on CPs.

 shows the sync state of an enterprise-class platform that has different Fabric OS versions 

installed on the active and standby CP. Use the table to determine if you need to use the 
fimrwareDownload -s command.

TABLE 44

Enterprise-class platform HA sync states 

Active CP Fabric OS 
version

Standby CP Fabric OS 
version

HA sync state

Remedy

v6.2.0

v6.2.0

inSync

n/a

v6.2.x

v6.3.0

inSync

n/a

v6.3.0

v6.2.x

If Ethernet Switch Service 
is enabled, no sync.

Run firmwareDownload -s on the 
standby CP and upgrade it to v6.3.0.

v6.3.0

v6.3.0

inSync

n/a

v6.3.0

v6.4.0

InSync

n/a

v6.4.0

v6.3.0

inSync

Run firmwareDownload -s on the 
standby CP and upgrade it to v6.4.0.

v6.4.0

v6.4.0

inSync

n/a