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Questions tagged [ethtool]

59 questions
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How to change the setting for a network device reported by ethtool, specifically Speed, on VM?

This is related to these two questions, although they don't answer my question. The machines are RHEL6. 1.ethtool not showing all the properties 2.changing network speed to 1000Mb/s Output on VM: [root@foo ~]# ethtool eth0 Settings for eth0: …
Ramadheer Singh
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Extremely slow network and half duplex

I am having an extremely slow network netperf -H 11.x.x.21 TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 11.x.x.21 (11.x.x.19) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size …
Kevin Parker
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RedHat 5: HP Server ethtool not working

I am trying to check/change my network card speed settings with RedHat 5 and a Proliant G6 server from HP. On eth0 I can not really use ethtool - it just says Link detected. The network card is a Broadcom NetXtremee II BCM5709. Is there any other…
weismat
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Unable to ping other devices in the network through ethernet port on a custom board

I am on a embedded development platform and trying to bring up the ethernet and do a ping test. As of now, I have the ethernet up after the linux boot, but I am unable to ping other systems. My thinking suggests that the phy is not configured…
user2532296
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Is there a network card that lets you set "master slave" mode in Linux?

I am trying to locate an ethernet network card that allows for the setting of the master slave mode. Ethtool add this configuration (ethtool -s master-slave ) but I can't find a card that supports it. I have several cards with the Intel i350 chip…
dranobob
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How to view current PHY master-slave settings in Linux (Centos Stream)

I am trying to view the current master-slave settings on my network cards (HPs with Intel controllers). I see ethtool has the master-slave option to set the mode, but I didn't see how to view the current setting. When I try only "ethtool " it…
dranobob
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Is there any load when reading EEPROM inside SFP module?

I am trying to measure the optical receving/transmitting levels with ethtool on the server. It was confirmed that ethtool reads information from EEPROM inside the SFP module. When a read operation to check the optical level occurs in the EEPROM,…
beginner
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Linux Link Speed Advertise

As far as I know, the following command would set the speed and duplex advertised by auto-negotiation. ethtool -s eth0 advertise 0x020 where 0x020 indicates 1000baseT Full according to the following guide: advertise N Sets the speed and duplex…
aschkant
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What if command (ethtool) to flash physical ports on NIC does not work? How can I identify which of the live ports are flapping?

I have 2 live ports and one of which has network flapping issue. ethtool -p runs but does not flash my ports. What else can I do without pulling the wrong fiber?
peacht
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Can not disable autoneg via ethtool

I want to disable the auto-negotiation feature of NIC, I run the following command $sudo ethtool -s ens1f0 speed 10000 duplex full autoneg off Then I check if it takes effect via ethtool ens1f0: Settings for ens1f0: Supported ports: [ FIBRE…
HypoGump
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How to direct flows to specific vf queue?

SR-IOV allows us to create a VF from PF, now I want to direct some flows to VF via Flow Director. Here is ethtool help message action N Specifies the Rx queue to send packets to, or some other action. loc N Specify the location/ID to…
HypoGump
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"Speed Mismatch" between 1000T and 10000T?

I have a server in a data center, which has an Ethernet NIC card with Fibre support. I have a 1Gbps connection and my ISP asked me to make sure the settings on my device are as follows: Full Duplex, 1000meg and NO Auto Negotiation However, I just…
Tarandeep Gill
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What tool can write arbitrary mii register

I did not see this capability in ethtool. Provided my driver support the SIOCSMIIREG ioctl, I should be able to write any mii register. Do you know any tool that would make use of this capability ?
shodanex
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ethtool error for limiting interface speed

i am limiting my bandwidth using ethtool and i used this command: sudo ethtool -s eth2 speed 500 But i got error message: Cannot advertise speed 500 i tried adding duplex half duplex full autoneg off …
yasmink
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