NVMe-TCP on RHEL/Rocky/AlmaLinux - Network Configuration

• Default in RHEL 8/9
• Better integration with systemd
• Dynamic configuration support
• Consistent across RHEL ecosystem

# Network scripts are deprecated
sudo systemctl disable network
sudo systemctl enable NetworkManager
sudo systemctl start NetworkManager

# Create connection for storage interface
sudo nmcli connection add type ethernet \
    con-name storage-nvme-1 \
    ifname <INTERFACE_1_NAME> \
    ipv4.method manual \
    ipv4.addresses <INTERFACE_1_IP>/<INTERFACE_1_CIDR> \
    ipv4.never-default yes \
    ipv4.may-fail no \
    802-3-ethernet.mtu 9000 \
    connection.autoconnect yes \
    connection.autoconnect-priority 10

# Optimize for storage
sudo nmcli connection modify storage-nvme-1 \
    ethtool.ring-rx 4096 \
    ethtool.ring-tx 4096 \
    ethtool.coalesce-rx-usecs 50 \
    ethtool.coalesce-tx-usecs 50

# Activate
sudo nmcli connection up storage-nvme-1

• ipv4.never-default yes - No default route on storage interface
• ipv4.may-fail no - Boot waits for this interface
• connection.autoconnect-priority 10 - Higher priority for storage
• ethtool.* - NIC tuning parameters

# Set MTU 9000 for jumbo frames
sudo nmcli connection modify storage-nvme-1 802-3-ethernet.mtu 9000

# Verify
nmcli connection show storage-nvme-1 | grep mtu

# Test MTU
ping -M do -s 8972 <storage_portal_ip>