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This document highlights minimum, recommended, and latest code versions for Dell Technologies Enterprise and Data Center Infrastructure products. Dell carefully evaluates and monitors code deployment data to ensure that product releases meet our stringent expectations to provide our customers with reliable products and solutions.
Updated: July 27, 2026
ID: 000205512
After upgrading to Fabric OS (FOS) 9.1.1c, unable to run inline commands from UNIX or Linux server to the switch with the "fosexec" commands.
Updated: May 19, 2026
ID: 000218645
Affected products after NX OS 9.4.2a upgrade:
Cisco MDS 9000 NX-OS and SAN-OS Software, Cisco MDS 9100 Series Multilayer Fabric Switches, Cisco MDS 9200 Series Multiservice Switches, Cisco MDS 9300 Series Multilayer Fabric Switches, Cisco MDS 9500 Series Multilayer Directors, Cisco MDS 9700 Series Multilayer Directors
Updated: May 23, 2026
ID: 000353884
This article provides steps to back up and restore Zones using DCNM.
Updated: May 19, 2026
ID: 000217625
This issue is seen when the audit logs are getting filled for the switches, receive notification email alerts from the switches, or when any switch is idle for some time and no events are generated.
Updated: May 18, 2026
ID: 000215691
This KB provides steps to collect switch #show tech-support through DCNM.
Updated: May 18, 2026
ID: 000215515
This issue can be triggered only if, while lower-numbered slot supervisor is in ha-standby state, it is pulled out of the chassis without issuing the command `out-of-service module x`.
Updated: May 18, 2026
ID: 000215131
Attempting to configure a /31 subnet mask on IPS interface for the MDS 9700 series directors and MDS 9220i switches generates an error stating 'Bad mask'.
Updated: May 17, 2026
ID: 000213363
The purpose of Smart Zoning is to reduce the amount of administrative overhead that is required to add new hosts to the SAN with the addition of a few keywords.
Updated: May 16, 2026
ID: 000206541
Learn how the MyService360 services analytics dashboard integrates the Dell AIOps (formerly CloudIQ) Health Score into the Install Base views. This integration streamlines services and product health management by IT admins using the MyService360 and Dell AIOps portals. Verify supported products by portal and access helpful Dell AIOps resources.
Updated: May 16, 2026
ID: 000206380
Downgrade from 8.5.1 to earlier 8.x versions fails to execute due to compatibility error in snmp config.
Updated: May 16, 2026
ID: 000206287
Domain IDs uniquely identify a switch in a Virtual Storage Area Network (VSAN). A switch may have different domain IDs in different VSANs. The domain ID is part of the overall Fibre Channel (FC) ID.
The configured domain ID can be preferred or static. By default, the configured domain ID is 0 (zero) and the configured type is preferred. Domain IDs can range from 1 to 239.
The 0 (zero) value can be configured only if you use the preferred option.
Updated: May 15, 2026
ID: 000203078
End devices unable to communicate - FCNS rejecting to all FC CT queries with 'logical busy'. Because end devices cannot get proper responses to their queries, they will not be able to communicate with one another.
Updated: May 13, 2026
ID: 000197900
When performing Connectrix MDS upgrade, the "install all" command returns the message "Pre-upgrade check failed. "Return code -1."
Updated: May 13, 2026
ID: 000197811
Connectrix MDS : 97xx Chassis information missing with error message %PLATFORM-2-PS_UNSUPPORTED
Updated: May 09, 2026
ID: 000185047
SCG, Base64 encoding, Cisco, ESRS script, password Base64 Encoding
Updated: May 08, 2026
ID: 000183204
On a zone activation, all HBAs zoned to a VPLEX front-end port are logged out and lose a path.
Updated: May 07, 2026
ID: 000181952
How to perform NX-OS upgrade on the MDS switches
Updated: May 07, 2026
ID: 000180494
F16_PLDA_RXBUF_MERR error on a single port ASIC results in a complete module reload.
Updated: May 05, 2026
ID: 000172417
SnakeLoobpack passed incorrect port range to module warning when SnakeLoopback could not identify faulty device.
Updated: May 05, 2026
ID: 000170235
Connectrix: IP_FCMAC_CNT_STATS_ERRORS_RX_BAD_WORDS_FROM_DECODER on admin down port
Updated: May 05, 2026
ID: 000167889
Faulty module' warnings and port loopback failures on MDS 9700 - This issue only occurs on MDS 9706 and MDS 9710 platforms with IPFC interfaces
Updated: April 17, 2026
ID: 000056773
"Interface fcx/y Slowport Count = ## Credit Delay" messages are streaming in "show logging" log from 16 Gbps switches.
Updated: April 17, 2026
ID: 000052588
This article describes how to troubleshoot xbar issues. Recently the field has been tasked with several mech replacements, that in the end, were not required.
Updated: March 20, 2026
ID: 000006063
32-bit Line card and fatal error in device DEV_F32_QUE (device error 0xc9c00600)
Updated: March 13, 2026
ID: 000031848
Using the SSH name command shuts down the management0 interface.
CAUTION: This causes loss of out of band connectivity to the switch
Updated: March 05, 2026
ID: 000184037
Here are the steps to configure the tx-/rx-datarate policy on an MDS switch.
These steps are not disruptive.
They do not affect the production traffic; they only change when the switch records information.
After this there will be a new active policy that has the same two counters as the previous slowdrain policy with the additional tx-/rx-datarate counter.
Any ports that go to 80% Tx or Rx utilization for 10 seconds will get an alert.
Note: This is a common request TAC makes when customers are concerned about performance in a fabric.
Updated: February 24, 2026
ID: 000189878
MDS 9700 switches with a supervisor 4 module (DS-X97-SF4-K9) may reboot, causing a switchover.
Updated: February 24, 2026
ID: 000198498
An MDS 9700 32 Gbps module spontaneously reloads.
This issue applies to MDS 9700 32 Gbps linecard (model DS-X9648-1536K9) only.
Updated: February 23, 2026
ID: 000412389
An MDS Supervisor-4 module resets without warning.
Updated: February 23, 2026
ID: 000222207