Automation Suite on Linux installation guide

Last updated Feb 18, 2026

How to disable TX checksum offloading

Checksum offloading on a network card may cause issues in some setups, including on VMware instances and in Cilium.

If you encounter such issues, you must disable the TX checksum offloading by running the following commands:

For server machines:
```
cat <<EOF | sudo tee /etc/systemd/system/disable-checksum.service
[Unit]
Description=Disable TX Checksum Offload
Before=rke2-server.service
Wants=network-online.target
After=network-online.target

[Service]
Type=oneshot
ExecStart=/bin/bash -c "ethtool -K $(awk '$2 == 00000000 { print $1; exit }' /proc/net/route) tx-checksum-ip-generic off || ethtool -K cilium_host tx-checksum-ip-generic off || true"
RemainAfterExit=true

[Install]
WantedBy=multi-user.target
EOF
sudo systemctl enable disable-checksumcat <<EOF | sudo tee /etc/systemd/system/disable-checksum.service
[Unit]
Description=Disable TX Checksum Offload
Before=rke2-server.service
Wants=network-online.target
After=network-online.target

[Service]
Type=oneshot
ExecStart=/bin/bash -c "ethtool -K $(awk '$2 == 00000000 { print $1; exit }' /proc/net/route) tx-checksum-ip-generic off || ethtool -K cilium_host tx-checksum-ip-generic off || true"
RemainAfterExit=true

[Install]
WantedBy=multi-user.target
EOF
sudo systemctl enable disable-checksum
```

For server machines:

cat <<EOF | sudo tee /etc/systemd/system/disable-checksum.service
[Unit]
Description=Disable TX Checksum Offload
Before=rke2-server.service
Wants=network-online.target
After=network-online.target

[Service]
Type=oneshot
ExecStart=/bin/bash -c "ethtool -K $(awk '$2 == 00000000 { print $1; exit }' /proc/net/route) tx-checksum-ip-generic off || ethtool -K cilium_host tx-checksum-ip-generic off || true"
RemainAfterExit=true

[Install]
WantedBy=multi-user.target
EOF
sudo systemctl enable disable-checksumcat <<EOF | sudo tee /etc/systemd/system/disable-checksum.service
[Unit]
Description=Disable TX Checksum Offload
Before=rke2-server.service
Wants=network-online.target
After=network-online.target

[Service]
Type=oneshot
ExecStart=/bin/bash -c "ethtool -K $(awk '$2 == 00000000 { print $1; exit }' /proc/net/route) tx-checksum-ip-generic off || ethtool -K cilium_host tx-checksum-ip-generic off || true"
RemainAfterExit=true

[Install]
WantedBy=multi-user.target
EOF
sudo systemctl enable disable-checksum

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