![]() ![]() You must manually configure these ports using the settings below.ĭepending upon the connector used for a port, enabling auto-negotiation also enables forward error correction (FEC), if the cable requires it (see the table below). You cannot disable auto-negotiation on 1GT or 10GT fixed copper switch ports.įor 1000BASE-T RJ-45 SFP adapters, auto-negotiation is automatically done on the SFP PHY, so enabling auto-negotiation on the port settings is not required.Disabling auto-negotiation on a 1G optical cable prevents detection of single fiber breaks.You must manually set any non-default link speed, duplex, pause, and FEC.If you do decide to disable auto-negotiation, be aware of the following: To enable a simpler configuration, Cumulus Linux allows you to configure auto-negotiation on all port types on Broadcom switches the port configuration software then configures the underlying hardware according to its capabilities. Some module types support auto-negotiation while others do not. If you disable auto-negotiation later or never enable it, then you have to configure any settings that deviate from the port default - such as duplex mode, FEC, and link speed settings. For RJ-45 SFP adapters, you need to manually configure the desired link speed and auto-negotiation as described in the default settings table below. Auto-negotiationīy default on a Broadcom-based switch, auto-negotiation is disabled - except on 10G and 1000BASE-T fixed copper switch ports, where it is required for links to work. Breakout port configuration, logical switch port limitations, and troubleshooting is also provided. This topic describes the auto-negotiation, link speed, duplex mode, MTU, and FEC settings and provides a table showing the default configuration for various port and cable types. When enabled, Cumulus Linux automatically configures the best link parameter settings based on the module type (speed, duplex, auto-negotiation, and FEC, where supported). You can disable FEC if necessary, which forces the firmware to not try any FEC options.įor Broadcom-based switches, consider enabling auto-negotiation on each port. Most of these settings are configured automatically for you, depending upon your switch ASIC however, you must always set MTU manually.įor NVIDIA Spectrum ASICs, the firmware configures FEC, link speed, duplex mode and auto-negotiation automatically, following a predefined list of parameter settings until the link comes up. (optional) bondN are bonds (IEEE 802.3ad link aggregation trunks, or port channels)Įach physical network interface (port) has a number of configurable settings:.(optional) brN are bridges (IEEE 802.1Q VLANs).ethN are switch management ports (for out of band management only).Switch Port AttributesĬumulus Linux exposes network interfaces for several types of physical and logical devices: If you are redirected to the main page of the user guide, then this page may have been renamed please search for it there. The current version of the documentation is available If you are using the current version of Cumulus Linux, the content on this page may not be up to date. Resource Diagnostics Using cl-resource-query.Using Nutanix Prism as a Monitoring Tool.Simple Network Management Protocol - SNMP.Monitoring System Statistics and Network Traffic with sFlow.Using NCLU to Troubleshoot Your Network Configuration.Monitoring Interfaces and Transceivers Using ethtool. ![]() Understanding the cl-support Output File.Network Switch Port LED and Status LED Guidelines.Bidirectional Forwarding Detection - BFD.Unequal Cost Multipath with BGP Link Bandwidth.Equal Cost Multipath Load Sharing - Hardware ECMP.Hybrid Cloud Connectivity with QinQ and VXLANs.Ethernet Virtual Private Network - EVPN.Virtual Router Redundancy - VRR and VRRP.Spanning Tree and Rapid Spanning Tree - STP.Default Cumulus Linux ACL Configuration.Authentication, Authorization and Accounting. ![]()
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