Dell Connectrix MDS 9132T Connectrix Cisco MDS-9000NX-OS 9.3.1 Release Note - Page 16

Known problems and limitations  IPS Ports: Traffic on IPS ports on Cisco MDS 9250i and Cisco MDS 24/10-Port SAN Extension Modules is disrupted during an upgrade or downgrade. Nodes that are members of VSANs traversing an FCIP ISL are impacted, and a fabric reconfiguration may occur. iSCSI initiators connected to the IPS ports lose connectivity to iSCSI targets while the upgrade is in progress.  If you are downgrading from Cisco MDS NX-OS Release 9.3(1) or later releases to a release prior to Cisco MDS NX-OS Release 9.3(1), ensure that you use the clear logging onboard txwait command after downgrading. Otherwise, logging to the OBFL TxWait file may cease with an error. For more information, see the Cisco MDS 9000 Series Interfaces Configuration Guide, Release 9.x. FICON Downgrade Path Cisco NX-OS 9.3(1) is not a FICON qualified release. Known problems and limitations For a list of problems with this release, please refer to the Cisco Release notes located at: http://www.cisco.com/en/US/products/ps5989/prod_release_notes_list.html This section lists the limitations and restrictions. Fibre Channel Read Diagnostic Parameters Fibre Channel RDP querying is not supported on NPV, Port Channel or FCoE links. SAN Extension Tuner San Extension Tuner (SET) is not supported on Cisco MDS 9220i switches in Cisco MDS NX-OS Release 9.3(1). DIRL and FPIN DIRL and FPIN are not supported on switches that are operating in the Cisco NPV mode. DIRL and FPIN are not supported on the following switches:  Cisco MDS 9250i Switches  Cisco MDS 9148S Switches FCIP Support In Cisco MDS NX-OS Release 9.3(1), FCIP Write Acceleration is not supported between 24/10 San Extension Module and Cisco 18+4 MSM and Cisco SSN16 Modules. In Cisco MDS NX-OS Release 9.3(1), FCIP Write Acceleration along with IVR is not supported on FCIP tunnels configured on Cisco MDS 9700 Series switches. FCIP tunnels using Cisco MDS 24/10 Port SAN Extension Module cannot be used across FSPF equal cost paths. On Cisco MDS 24/10 Port SAN Extension Module, configuring 16 Dell Connectrix Cisco MDS 9000 Release Notes