Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(2) (OL-25090-02 F0, January 2012)

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Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(2)
OL-25090-02
Limitations and Restrictions
RSPAN Traffic Not Supported on CTS Ports on 8-Gbps Switching Modules
An inter-switch link (ISL) that is enabled for Cisco TrustSec (CTS) encryption must be brought up in
non-CTS mode to support remote SPAN (RSPAN) traffic on the following modules:
• DS-X9248-96K9: Cisco MDS 9000 48-Port 8-Gbps Fibre Channel Switching Module
• DS-X9224-96K9: Cisco MDS 9000 24-Port 8-Gbps Fibre Channel Switching Module
• DS-X9248-48K9: Cisco MDS 9000 4/44-Port Host-Optimized 8-Gbps Fibre Channel Switching
Module
If the ISL link is brought up with CTS enabled, random packets drops of both RSPAN traffic and normal
traffic will occur on the receiver port switch.
I/O Accelerator Feature Limitations
IOA does not support the following NX-OS features:
• F port trunking
• F port channeling
• IOA cannot be configured on flows in topologies that have devices with NPV and NPIV enabled.
For example, IOA is not supported in a topology where a host logs in from a NPV edge switch and
IOA is deployed on a NPV core switch for this host.
Support for FCIP Compression Modes
In Cisco NX-OS Release 4.2(1b) and later, FCIP compression mode 1 and compression mode 3 are not
supported on the Cisco MSM-18/4 module and on the SSN-16 module.
Saving Copies of the Running Kickstart and System Images
After you upgrade to MDS NX-OS Release 4.2(1b), you are not allowed to delete, rename, move, or
overwrite the kickstart and system images that are in the current system bootvar settings on an active or
standby MDS Supervisor-2 module on any Cisco MDS 9500 Series switch. This restriction does not
apply to the integrated supervisor module on the MDS 9200 and MDS 9100 series switches.
Configuring Buffer Credits on a Generation 2 or Generation 3 Module
When you configure port mode to auto or E on a Generation 2 module, one of the ports will not come
up for the following configuration:
• Port Mode: auto or E for all of the ports
• Rate Mode: dedicated
• Buffer Credits: default value
When you configure port mode to auto or E on a Generation 3 module, one or two of the ports will not
come up for the following configuration:
• Port Mode: auto or E for the first half of the ports, the second half of the ports, or for all of the ports