Dell EMC MX5108n Networking Solution Release Notes PDF

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Summary of Content for Dell EMC MX5108n Networking Solution Release Notes PDF

Rev. A00 August 2022

Dell EMC SmartFabric OS10 Release Notes for PowerEdge MX This document describes the new and changed features, restrictions, resolved issues, and known issues in the Dell EMC SmartFabric OS10 Release Current Release Version: Release Date: 2022-08-29 Previous Release Version:

The information in this document is applicable to all the switches listed in the Supported hardware section.

For documentation about the Dell EMC open network install environment (ONIE)-enabled hardware switches, see https://

Document revision history Table 1. Revision History

Revision Date Description

A00 202208-29 ReleaseAdded new features for the release to the New and changed in section. Added AR-40938, AR-41557, AR-41725, AR-41743, AR-41774, AR-41833, AR-40450, AR-41869, AR-41144, AR-41258, AR-41478, AR-34127, AR-41626, and AR-41922 to the Resolved issues in section.

Supported hardware

The current release is supported on the following Dell EMC Switches:

Dell EMC PowerEdge MX7000 with the following ethernet modules: MX9116n Fabric Switching Engine MX5108n Ethernet Switch

New and changed in

Functional Area Feature Description Summary of Benefits

Cryptography Dell OpenSSL Crypto Library v2.6

FIPS 140-2 certified crypto module update to meet CMVP requirements, extending the certification to September 2026.

Security SSH The SSH cipher 3des-cbc is no longer in use due to weak security. It is not part of the default SSH ciphers, and it cannot be selected as a cipher choice.

VLAN VLAN Stacking in Full Switch Mode for MX

Enables the service providers to provide separate VLANs to customers and provide better VLAN management and easier VLAN scaling.


Functional Area Feature Description Summary of Benefits

VLAN VLAN Scaling in Full Switch Mode for MX

This feature provides better VLAN scaling, and more VLANs are available for the customer.

200K PV on MX9116

45K PV on MX5108

VLAN VLAN Scaling in SmartFabric mode for MX

This feature provides better VLAN scaling, and more VLANs are available for the customer.

3000 per fabric and 1500 per server port.

VLANs per uplink: 3000 if one uplink, or a total of 3000 if multiple uplinks.

VLAN Reduce the restricted VLAN range from 4001-4020 to only 4004, and 4020.

This feature enables the use of more VLANs in the restricted range. You can now use the VLANs that were in the restricted range in your data center environment.

Cables and Optics Support for Cables and Optics Support for additional optics and cables on the MX platform.

QoS QoS Settings for NVMe/TCP NVMe/TCP is supported on the PowerEdge MX Platform. This will have assigned QoS Group and Queue 4 for NVMe traffic flow

OMNI Default Uplink You can assign an uplink as the default uplink through the OMNI GUI. This in turn will attach VLANs to the default uplink and provide better VLAN management. This covers all new deployment, upgrade, and delete scenarios.

See the OS10.5.4 product support pages ( for user documentation pertaining to the new features.

Known Software Behavior - Dell EMC PowerEdge MX

NOTE: The software behaviors that are mentioned here are applicable to OS10 revision and later.

Ethernet Modules

When upgrading from earlier releases to, aaa authentication configuration with nonlocal authentication methods as the first target in the startup configuration gets rejected and replaced with the default aaa authentication configuration: aaa authentication login default local.

If you configure multiple authentication methods on Dell EMC PowerEdge MX7000 Ethernet modules - MX9116n Fabric Switching Engine and MX5108n Ethernet Switch, you must configure local authentication as one of the methods in the list. Before, local authentication had to be the first method in the list.

From, if you configure multiple authentication methods on Dell EMC PowerEdge MX7000 Ethernet modules - MX9116n Fabric Switching Engine and MX5108n Ethernet Switch - you must configure local authentication as one of the methods in the list.

False Errors on FC Ports

The total errors count in the show interface fibrechannel command output displays incorrect values during FC port flaps, IOM reboot, or port conversion from ETH to FC, followed by bringing up of the FC port.

NOTE: This behavior is applicable only to the MX9116n.


Fibre Channel

After you change the FC Map on FIP snooping enabled active VLAN sessions, use the shut and no shut commands to reestablish the FCoE sessions.

The maximum number of members in an FC Zone is 255.

NOTE: This behavior is applicable only to the MX9116n.

For the default-zone settings to work properly, ensure that the maximum number of logged-in FC and FCoE nodes is less than 120.

NOTE: This behavior is applicable only to the MX9116n.

FCoE-generated Access Control Lists (ACLs) take precedence over user-configured ACLs. A user-configured ingress ACL entry cannot deny FCoE and FIP snooping frames.

After you remove the vfabric configuration from an interface, to configure the MTU to default value, configure the nondefault MTU and then configure the default MTU.

In a FIP snooping bridge, FIP and FCoE frames ingressing on a PFC mismatch interface are dropped.

NOTE: This behavior is only applicable to the MX9116n and MX5108n.

PFC mismatch on a port channel member port drops FIP and FCoE frames ingressing on that member port, but the learned Enode/Session/FCF information that is associated with the port channel is retained. This results in FCoE show commands displaying misleading information. To resolve this issue, check and correct the PFC configuration on both the ends.

When you configure a port channel as VLT port channel, the port channel goes down operationally and comes up in the local device. The physical interfaces are operationally up. This leads to the switch removing the FCoE sessions. The remote server is not aware of the port channels being up and down, so the server maintains the FCoE sessions. As these sessions are not available in the switch, the FCoE frames are dropped in the switch. To resolve this, manually flap the port channel.

Login delay

When logging into a switch, it may take 6 to 10 seconds for the CLI prompt to display.


After upgrading to or later in Full Switch mode, the MTU defaults to 9216 on all VLANs and Ethernet Interfaces which do not already have a user configured MTU.

Obscure password

Obscure password (service obscure-password) is enabled by default when upgrading to or later if the setting is left untouched before upgrade.

If obscure password configuration is explicitly disabled before upgrade, it remains in disabled state after upgrade.

Source MAC address handling

Learning of source MAC address from received LLDP and LACP packets is disabled.

VLAN scale

If the number of configured VLANs is more than 500, it is recommended to have IGMP/MLD snooping enabled only on the required VLANs and do not exceed a maximum count of 500 enabled VLANs. Alternatively, disable IGMP/MLD snooping globally.

NOTE: IGMP/MLD snooping is disabled by default in MX-Series SFS mode but is enabled in Full Switch mode. Please

see the Dell EMC SmartFabric OS10 User Guide for more information.


Resolved issues in The following high severity issues have been resolved in this release.

Issue ID Functional Area Description

AR-40938 QOS Unable to remove the L2QOS policy from the interface when the QOS-ACL table entries exceed the allowed limit.

AR-41557 Network Monitoring Services ERSPAN session creation fails when the configured destination IP is reachable via a VLAN interface which is tagged to a port channel.

AR-41743 Routing services, Routing Table Manager (RTM)

System chooses static route over OSPF even if the static route has a higher Administrative Distance(AD).

AR-41774 Switch Abstraction Interface (SAI) In certain scenarios, the switch experiences an unexpected crash while checking the port status.

AR-41833 Base services The management console displays the error message "The operational status of the I/O Module identified in the message has ended".

AR-40450 DNV If the admin password has the @ symbol in the passphrase, the module replacement script fails.

AR-41869 Port Security Restoration of Sticky-MACs present in the CPS DB is failing, which might cause a system crash while upgrading from 10.5.2.

AR-41144 PAS Media Optic reports no power on Tx for QSFP-28 100G media as there is no check to display the Tx power values.

AR-41258 VLT, Port-channel Port channel creation fails when the default VLAN is 1024.

AR-34127 Management Services When AAA accounting is enabled using the aaa accounting commands all console start- stop logging command, the commands configured by the user are not logged in the log-file.

AR-41626 Logging Server Unable to disable the server logging using the no logging server

AR-41922 Fabric Services Assigning VLANs to interfaces or creating new VLANs can fail in Smart Fabric mode.


Known issues in The following high severity issues remain unresolved in this release.

Issue ID Functional Area Description Workaround or Resolution



Backup and Restore In a mix mode deployment of both fabric and full switch mode IOMs, the backup taken will have fabric mode IOMs as this feature is not supported in full switch mode IOMs. In this case if full switch mode is the leader, an IOM that is not part of the backup file, and the fabric restore operation fails

Trigger the restore by having one of the nodes in the backup file as the leader node by doing a manual switchover. Switchover the leader after restore the fabrics.



Backup and Restore When you restore the IOMs from Full Switch to Fabric mode after deleting the entire MCM, the restore operation fails.

Follow the two-step restore procedure as below: Restore the MCM group. After the MCM is restored, you

must trigger the Smart Fabric restore operation.

AR-41125 Backup and Restore During the cluster formation, if the management interface is down, you could observe undefined behavior like memory leaks in the cluster.

It is recommended to have the management interfaces of all the IOMs up and running during cluster formation.

AR-40745 Management In fabric mode and a scaled VLAN environment, switchover to the fabric master results in the OME-M fabric page going blank for nearly 10 mins. Recovery happens automatically.


AR-40760 Management During DUP downgrade with a new MX9116n IOM in the fabric or cluster, OS10 downgrade is successful but ONIE firmware downgrade fails.

Remove the staged previous ONIE-firmware using onie-fwpkg purge and then reload the node.

AR-40804 FCoE ESXi hosts may see out of order FCoE packets when the path to the storage has 32G FC ports connected to the MX switch.

Configure the FC port to 16G speed.

AR-40994 Management During fabric restore, after restoring CLI configuration manually using the OS10 copy command on all the IOMs in the fabric or cluster, a few of the IOMs restored CLI configuration may get overwritten by factory default settings.

Reload the IOMs after manually restoring the CLI configuration using the copy command.


Issue ID Functional Area Description Workaround or Resolution

AR-42158 ISCSI System reboots due to dn_app_iscsi_op process memory leak.


PowerEdge MX Installation Instructions

NOTE: OS downgrade or rollback is not recommended for MX-series switches.

See the OS10 Firmware Update Matrix section in the latest version of the Dell EMC OpenManage Enterprise-Modular Edition for PowerEdge MX7000 Chassis User's Guide for instructions to update the MX9116n Fabric Switching Engine, and MX5108n Ethernet switch to the latest version.

For additional information on PowerEdge MX Networking, see the Dell Infohub.

Support resources The Dell EMC Support site provides a range of documents and tools to assist you with effectively using Dell EMC devices. Through the support site you can obtain technical information regarding Dell EMC products, access software upgrades and patches, download available management software, and manage your open cases. The Dell EMC support site provides integrated, secure access to these services.

To access the Dell EMC Support site, go to Sign in with a previously created account or create a new account. To display information in your language, scroll down to the bottom of the page and select your country from the drop-down menu. To obtain product-specific information, enter the 7-character service tag or 11-digit express service code of your switch and

click Submit.

To view the service tag or express service code, pull out the luggage tag on the chassis or enter the show chassis command from the CLI.

To submit service requests or to contact technical support by phone or chat, click Contact Us, then click Technical Support.

To access product documentation and resources that might be helpful to configure and troubleshoot the OS10 Networking operating system, see the Dell EMC Networking OS10 Info Hub.

To search for drivers and downloads, see

To participate in Dell EMC community blogs and forums, see


Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the


WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

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