HP Cisco MDS 8/24c Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Rel - Page 34

Limitations and Restrictions Send documentation comments to [email protected] 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 • Rate Mode: dedicated • Buffer Credits: default value When you configure port mode to auto or E for all ports in the global buffer pool, you need to reconfigure buffer credits on one or more of the ports. The total number of buffer credits configured for all the ports in the global buffer pool should be reduced by 64. Features Not Supported on the Cisco MDS 9148 Switch The Cisco MDS 9148 Multilayer Fabric Switch does not support the following NX-OS features: • IVR • Remote Span Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.0(4d) 34 OL-21012-06