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Questions tagged [ethtool]

62 questions
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Alternative ways to track dropped packets and report output

Instead of tailing /var/log/messages or doing a continuous ping is there a way with ifconfig or ethtool to track dropped packets, collisions, or tx/rx errors in real time?
user53029
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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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Trying to set wake-on-lan persistently on linux fails

This is my box: Linux mediacenter 5.15.122-1-MANJARO #1 SMP PREEMPT Tue Jul 25 07:09:46 UTC 2023 x86_64 GNU/Linux I am trying to follow https://wiki.archlinux.org/title/Wake-on-LAN But I am failing to make the changes persistent. I have tried the…
phtm
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Alma 9 Unable to make the interface DOWN at boot

OS: Alma-9.2 I am trying to disable an interface (ens224) at boot using the nmcli tool. I tried using the option nmcli connection modify ens224 connection.autoconnect no,nmcli connection down id ens224, nmcli device disconnect id ens224, ifconfig…
Vishnu
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No info found about `ethtool -T` output?

Nowhere I can find such info, to interpret the following number: PTP Hardware Clock: 1 Most documentation I can find (e.g. from RedHat it shows 0). What does it mean?
jaques-sam
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Why does connectivity differ for straight and crossover cabling towards 1Gbit MDI-X capable switch (from Linux OS)?

There's no constraint with directly connecting a Realtek 1000/100/10Mbit transceiver towards a common router. There was no connection ('Could not activate connection: Connection 'Name of Lan connection' is not available on device eth0 because…
beyondtime
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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 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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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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