Category Archives: linux ethtool sfp

Linux ethtool sfp

If the drivers are not available on your Linux version, you need to install them manually and load the modules in kernel. The vendor id for QLogic is and the device id is You could confirm this using the lspci -nn command as shown below.

This can be done by searching the list of available modules. Replace 2. The output shows the module qla2xxx is loaded by the kernel. If you don't see any output for lsmod command then you can load the module using modprobe command. The directories host3 and host4 in the example above contains information specific to each adapter like node name WWNport name WWNtype, speed,state etc.

Hello, How we can tell, that we have 2 x 2-port hba and not 4 x 1 hba port hba? Good link, Had my hba configured, But have an other problem where hba is showing down. If the drivers are not available on your Linux version, you need to install them manually and load the modules in kernel Here is a step by step guide to verify that your FC HBAs installed and configured correctly. Run the lspci command to list all PCI cards detected on the system.

You could confirm this using the lspci -nn command as shown below lspci -nn grep "Fibre Channel" Post Comment. Post Reply. Vivek March 16, AM Nice and precise. Kiran December 18, AM Simple and clear.

Naga December 5, AM to find the kernel modules for the devices, we can use lspci -k instead. Olivier November 27, PM Very useful, thanks! Daniel October 30, PM Great info! Priya October 27, AM Very well explained. Thank you Reply.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Network Engineering Stack Exchange is a question and answer site for network engineers.

It only takes a minute to sign up. Ethtool is telling me that these functions are not supported, and when I try to set them with 'ethtool -A eth2 autoneg on rx on tx on', nothing changes. Intel's webpage says that these functions should be supported for the X family. The network driver is ixgbe 3. Is the problem a compatibility issue, or is there a configuration I'm missing?

linux ethtool sfp

Autonegotiation isn't supported for 10 Gig connections. This guy breaks it down a little bit.

linux ethtool sfp

Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. No auto-negotiation for X with 10G direct attach cable? Ask Question. Asked 5 years, 10 months ago. Active 5 years, 6 months ago. Viewed 4k times. James James 31 1 1 silver badge 2 2 bronze badges. Did any answer help you? Alternatively, you could provide and accept your own answer.

Active Oldest Votes. Avery Abbott Avery Abbott 1, 7 7 silver badges 15 15 bronze badges. Thanks, it looks like I misunderstood how the auto-negotiation is used.

The problem remains with the flow control, though. I definitely need the device to support receiving ethernet pause frames, and I think that can happen without auto-negotiation for this connection.

Determining GBIC and SFP module details in linux

I'm not sure why ethtool says pause frames are unsupported when your link says flow control is enabled. What does your switch say when the link is up? Have you done a packet capture to see if you're sending or receiving pause frames? Sign up or log in Sign up using Google. Sign up using Facebook.

Sign up using Email and Password.Results may vary if you mix speed settings. Not all modules are applicable to all devices. The link speed must be configured to either 10 Gbps or 1 Gbps to match the link partners speed capabilities. Incorrect speed configurations will result in failure to link.

If you plug in a different type of module, the driver will not load. Other module types are not supported. Please see your system documentation for details.

Active direct attach cables are not supported. Intel is not endorsing or promoting products made by any third party and the third party reference is provided only to share information regarding certain optic modules and cables with the above specifications. There may be other manufacturers or suppliers, producing or supplying optic modules and cables with similar or matching descriptions.

Customers must use their own discretion and diligence to purchase optic modules and cables from any third party of their choice. If the value is greater than 0 it will also force the VMDq parameter to be 1 or more. NOTE: This parameter is only used on kernel 3.

On kernel 3. Also, for Red Hat distributions, this parameter is only used on version 6. For version 6.

linux ethtool sfp

For example:. The parameters for the driver are referenced by position. Thus, if you have a dual port adapter, or more than one adapter in your system, and want N virtual functions per port, you must specify a number for each port with each parameter separated by a comma. NOTE: Caution must be used in loading the driver with these parameters. Depending on your system configuration, number of slots, etc.

Bus layout will vary by operating system. On operating systems that support it, you can check sysfs to find the mapping. For example. With kernel 3. Prior to kernel 3. When DCB is enabled, network traffic is transmitted and received through multiple traffic classes packet buffers in the NIC.

The traffic is associated with a specific class based on priority, which has a value of 0 through 7 used in the VLAN tag. The number of queue pairs for a given traffic class depends on the hardware configuration.We expect the MAC driver to configure exactly the modes that are specified without any negotiation being enabled on the link. In-band mode is used with Please send patches to improve this documentation. This can be done as a separate preparation commit.

An older example of this preparation can be found in git commit fcbfb0, although this was splitting into three parts; the link-up part now includes configuring the MAC for the link settings. Please note that some of these functions must be called under the rtnl lock, and will warn if not. This function is replaced by a different form of MAC updates described below in 8. If step 1 was performed, then the functionality will have been split there.

These are the new ethtool link modes, so bitmask operations must be used. The call includes the negotiation mode and interface for reference only. This means the function should modify the state and only take the link down when absolutely necessary to change the MAC configuration. The Linux Kernel 5. In-band mode In-band mode is used with By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Cannot set 1G speed on 10G nic using ethtool Ask Question. Asked 5 years, 5 months ago. Active 5 years, 5 months ago. Viewed 4k times. On searching online I found that this command should do the job: sudo ethtool -s p1p1 advertise 0x speed But when I run it I get the following error: Cannot set new settings: Invalid argument not setting advertise not setting speed Anything I am missing?

Or is it that form my case I will need to change the driver? Akshya Akshya 2 2 silver badges 5 5 bronze badges. Your NIC doesn't appear to support this. What NIC is this?

Active Oldest Votes. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

Linux ixgbe* Base Driver Overview and Installation

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Click Here to receive this Complete Guide absolutely free. I am working on a project where we are trying read the eeprom of the SFPs plugged into the server. We are using Mellanox Connect2-EN and have not been able to do that. I am not tied to Mellanox if it just is not supported by them.

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Enabling unsupported SFP+ transceivers on the Intel X520/Dell R720

Find More Posts by NetEng1.Need support for your remote team? Check out our new promo! Select all Open in new window. IT issues often require a personalized solution. Why EE? Get Access. Log In. Web Dev. NET App Servers. We help IT Professionals succeed at work. Medium Priority. Last Modified: We are seeing the following on a RHEL 6. Start Free Trial. View Solutions Only. Duncan Roe Software Developer. Commented: Much of what goes into dmesg can also be sent to a log file.

The minus sign tells the log daemon not to sync the file system after every write you really don't want it to. From casual inspection, this seems to have captured most of the last screen of dmesg output or maybe even all of it.


I suggest you try something similar on your system and see of the messages of interest appear in the log file. Not the solution you were looking for? Getting a personalized solution is easy. Ask the Experts.

Author Commented: Explore More Content. Solution Pix logging to linux server. Article Backups and Disaster Recovery.

linux ethtool sfp

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