Linux script for ethtool

Michael McKenney

I am trying to get this script to run in Ubuntu 20.04.

I placed it in /usr/local/bin$, /etc/init.d$,

#!/bin/sh
### BEGIN INIT INFO
# Provides:          1000Mbs
# Required-Start:    $all
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: Halts USB power...
### END INIT INFO

ETHTOOL="/usr/sbin/ethtool"
DEV="ens32"
SPEED="1000 duplex full"
RXBUFFERS="4096"
TXBUFFERS="4096"
NEG="off"
case "$1" in
start)
echo -n "Setting ens32 speed 1000 duplex full autoneg off...";
$ETHTOOL -s $DEV speed $SPEED autoneg $NEG;
echo -n "Setting ens32 rx 4096 tx 4096...";
$ETHTOOL -G $DEV rx $RXBUFFERS tx $TXBUFFERS;
echo " done.";;
stop)
;;
esac
exit 0

here is /etc/systemd/system/1000Mbs.service


[Unit]
After=network.service

[Service]
ExecStart=/usr/local/bin/1000Mbs.sh

[Install]
WantedBy=default.target

I

I follow this link

rx and tx don't set. sudo /etc/init.d/1000Mbs does work but not on restart in Ubuntu 20.04.

Don Pezet

The script might not actually be running when systemd starts the service. Add a line to the end of your script that writes to syslog so you can make sure it is actually running. You can use something like:

logger NIC configuration script has executed

Also, I believe Ubuntu uses the dash shell during boot up so systemd may not be happy with calling that script directly. You might want to consider changing the ExecStart line to read:

[Service]
ExecStart=/usr/bin/bash /usr/local/bin/1000Mbs.sh

You could also consider doing away with the script altogether. You have hardcoded all the values so there is no real advantage over just calling the ethtool command directly and passing command line arguments. That is assuming you didn't have plans to expand the script further later on.

Michael McKenney

I added start to it

[Unit]
After=network.service

[Service]
ExecStart=/usr/local/bin/1000Mbs.sh start

[Install]
WantedBy=default.target

sudo systemctl enable 1000Mbs.service

to get it to work on restart.

Auto negotiate = off is not working.

ethtool ens32
Settings for ens32:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  1000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: off (auto)
Cannot get wake-on-lan settings: Operation not permitted
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

Michael McKenney

The Ubuntu 20.04 servers for CLI only. The only method was using ethtool commands. I searched for a way to add it to the netplan files or another way.