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Welcome to NVIDIA Mellanox MLNX-OS Documentation

NVIDIA® Mellanox MLNX-OS® operating system, enables the management and configuration of Mellanox Technologies’ InfiniBand switch system platforms.

MLNX-OS provides a full suite of management options, including support for Mellanox’s UFM® (Unified Fabric Manager), SNMPv1, 2, 3, and web user interface (Web UI). In addition, it incorporates a familiar industry-standard CLI, which enables administrators to easily configure and manage the system.

These pages provide information about the scope, organization, and command line interface of MLNX-OS as well as configuration examples.

Intended Audience

These pages are intended for network administrators who are responsible for configuring and managing Mellanox Technologies’ switch platforms.

Related Documentation

The following table lists the documents referenced in this User Manual. 

Document NameDescription

System Hardware User Manual

This document contains hardware descriptions, LED assignments, and hardware specifications, among other things

Switch Product Release NotesPlease look up the relevant switch system/series release note file

Revision History

A list of the changes made to this document are provided in Document Revision History.




Authentication, Authorization, and Accounting:

  • Authentication—verifies user credentials (username and password)
  • Authorization—grants or refuses privileges to a user/client for accessing specific services
  • Accounting—tracks network resources consumption by users

Address Resolution Protocol. A protocol that translates IP addresses into MAC addresses for communication over a local area network (LAN).


Command Line Interface. A user interface in which you type commands at the prompt.


Domain Name System. A hierarchical naming system for devices in a computer network.


The Dynamic Host Configuration Protocol (DHCP) is an automatic configuration protocol used on IP networks.

Director switchA high density InfiniBand chassis switch system.

Domain Name System. A hierarchical naming system for devices in a computer network.

Fabric managementThe use of a set of tools (APIs) to configure, discover, and manage and a group of devices organized as a connected fabric.

File Transfer Protocol (FTP) is a standard network protocol used to transfer files from one host to another over a TCP-based network, such as the Internet.

GatewayA network node that interfaces with both InfiniBand and Ethernet, using different network protocols.
GIDGlobal Identifier. A 128-bit number used to identify a Port on a network adapter (see below), a port on a Router, or a Multicast Group.
GUIDGlobally Unique Identifier. A 64-bit number that uniquely identifies a device or component in a subnet.
HAHigh Availability. A system design protocol that provides redundancy of system components, thus enables overcoming single or multiple failures in minimal downtime.
HostA computer platform executing an Operating System which may control one or more network adapters.
LDAPThe Lightweight Directory Access Protocol is an industry standard application protocol for accessing and maintaining distributed directory information services over an IP network.
LIDLocal Identifier. A 16 bit address assigned to end nodes by the subnet manager. Each LID is unique within its subnet.
LLDPLink Layer Discovery Protocol. A vendor neutral link layer protocol used by network devices to advertise their identify, capabilities and for neighbor discovery.
MACA Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment. MAC addresses are used for numerous network technologies and most IEEE 802 network technologies including Ethernet.
MTUMaximum Transfer Unit. The maximum size of a packet payload (not including headers) that can be sent /received from a port.
Network AdapterA hardware device that allows for communication between computers in a network.

Remote Authentication Dial In User Service. A networking protocol that enables AAA centralized management for computers to connect and use a network service.

RDMARemote Direct Memory Access. Accessing memory in a remote side without involvement of the remote CPU.
SASubnet Administrator (SA) is the interface for querying and manipulating subnet management data.
SCPSecure Copy or SCP is a means of securely transferring computer files between a local and a remote host or between two remote hosts. It is based on the Secure Shell (SSH) protocol.
SMSubnet Manager. An entity that configures and manages the subnet, discovers the network topology, assign LIDs, determines the routing schemes and sets the routing tables. There is only one master SM and possible several slaves (Standby mode) at a given time. The SM administers switch routing tables thereby establishing paths through the fabric.
SNMPSimple Network Management Protocol. A network protocol for the management of a network and the monitoring of network devices and their functions.
NTPNetwork Time Protocol. A protocol for synchronizing computer clocks in a network.
SSHSecure Shell. A protocol (program) for securely logging in to and running programs on remote machines across a network. The program authenticates access to the remote machine and encrypts the transferred information through the connection.
syslogA standard for forwarding log messages in an IP network.
TACACS+Terminal Access Controller Access-Control System Plus. A networking protocol that enables access to a network of devices via one or more centralized servers. TACACS+ provides separate AAA services.