Cisco Cisco MDS 9000 SAN-OS Software Release 1.0 Guía De Instalación

2    00-14-a9-74-db-30 to 00-14-a9-74-db-34  JAB093301JZ

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This section describes how to perform nondisruptive upgrades on the following Cisco fabric switches:

Cisco MDS 9148 Multilayer Fabric Switch

Cisco MDS 9222i Multiservice Modular Switch

This section includes the following topics:

You can upgrade software on the following switches without any disruptions by using the install all 
command for the system software images: 

Cisco MDS 9148 Multilayer Fabric Switch

Cisco MDS 9222i Multiservice Modular Switch

When the installation is completed, the supervisor kickstart image, supervisor system image, line card 
image, and the system BIOS are all updated.

Nondisruptive upgrades on these fabric switches disrupts the control plane for not more than 80 seconds. 
The software upgrade might be disruptive if the upgrade progresses beyond when it can be stopped 
gracefully or if a failure occurs.

During the upgrade the control plane is down, but the data plane remains up. New devices are not able 
to log in to the fabric through the control plane, but existing devices do not experience any disruption of 
traffic through the data plane.

Before attempting to upgrade any software images on the fabric switches, follow these guidelines:

During the upgrade, the fabric must be stable. Do not perform these configuration activities during 
the upgrade:

Zoning changes

Telnet sessions

Schedule changes

Switch cabling

Addition or removal of physical devices

Configure the FSPF timers to the default value of 20 seconds.