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Chapter 10
Managing Modules
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
Cisco MDS SAN-OS Release 2.0(2b) through Release 2.1(1a). Once you set the SSI image boot variable,
you do not need to reset it for upgrades or downgrades to any Cisco MDS SAN-OS release that supports
the SSI image.
If your switch is running Cisco MDS SAN-OS Release 2.1(2) or later, a newly installed SSM initially
Note
operates in Fibre Channel switching mode by default.
You cannot configure the ASM-SFN image boot variable and the SSI image boot variable for an ASM
Note
or SSM concurrently. The ASM and SSM can run only one or the other.
If you downgrade to a Cisco MDS SAN-OS release that does not support the ASM or SSM, you must
Note
power down the module. The boot variables for the SSM are lost.
The ASM is only supported up to Cisco MDS SAN-OS Release 2.1(1a). The ASM is not supported in
Note
Cisco MDS SAN-OS 2.1(2) or later.
SSI Boot Image Upgrade Considerations for the SSM
When you upgrade, or downgrade, the SSI boot image on an SSM, you might disrupt traffic through the
module.
Table 10-10
Cisco MDS SAN-OS Release
2.0(2b) through 2.1(1a)
2.1(2) and later
1. Requires EPLD version 2.1(2). See
As shown in
SSI boot image. If you have configured layer 3 Intelligent Storage Services on your SSM, we recommend
that you shutdown these services before upgrading the SSI boot image. You can use dual fabric
configuration to minimize the impact of shutting down layer 3 services.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Table 10-10
describes how updating the SSI boot image affects SSM traffic.
SSI Boot Image Updating Affects on SSM Traffic
"EPLD Configuration" section on page
Table
10-10, layer 3 Intelligent Storage Services traffic is disrupted when you update the
Traffic Type
All
Layer 2 Fiber Channel switching
only
Both Layer 2 Fiber Channel
switching and Layer 3 Intelligent
Storage Services (such as
FCWA, NASB, SANTap, ISAPI
virtualization)
Layer 3 Intelligent Storage
Services (such as FCWA, NASB,
SANTap, ISAPI virtualization)
only
Cisco MDS 9000 Family Configuration Guide
Installing the SSI Boot Image on the SSM
Disrupts Traffic?
Yes
1
No
Yes
Yes
10-15.
10-21
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