Setting up networking in Linux using the command line involves configuring network interfaces, IP addresses, routes, and other networking parameters. In your case, with InfiniBand and Ethernet (Fiberchannel) networking, you’ll likely have to set up multiple network interfaces and configure them accordingly. Here’s a general overview of the process:

  1. Identify Network Interfaces: Use the ifconfig or ip link command to list available network interfaces. In this case, you’ll see interfaces for both InfiniBand and Ethernet (Fiberchannel).
  2. Configure Network Interfaces: Use the ifconfig or ip command to configure network interfaces. For example, to configure an IP address for an Ethernet interface:bashCopy codesudo ip addr add 192.168.1.10/24 dev eth0
  3. Set Up Routing: Configure routing using the ip route command. Add default gateway routes and any specific routes you need for your network configuration.
  4. Configure DNS: Edit the /etc/resolv.conf file to set up DNS servers for hostname resolution. For example:
    nameserver 8.8.8.8
    nameserver 8.8.4.4
  5. InfiniBand Setup: For InfiniBand, you might need to use tools specific to the InfiniBand stack, such as ibconfig, ibstat, and iblinkinfo, to manage and configure InfiniBand interfaces and connections.
  6. Fiberchannel (Ethernet) Setup: For Fiberchannel over Ethernet (FCoE) networking, you’ll treat the Ethernet interfaces as usual. Ensure that FCoE is configured properly, and you might need to configure Fibre Channel HBAs (Host Bus Adapters) using tools provided by the HBA manufacturer.
  7. Persist Configuration: Changes made using the ip or ifconfig commands are temporary and won’t persist after a reboot. To make configurations permanent, you need to edit relevant configuration files. For example, for Ethernet interfaces, edit /etc/network/interfaces on Debian-based systems or /etc/sysconfig/network-scripts/ifcfg-<interface> on RedHat-based systems.
  8. Restart Networking: After making changes, you can restart the networking service to apply the configurations:
    sudo systemctl restart networking # For systemd-based systems
    sudo service network restart # For SysVinit-based systems

Remember, the specific steps and commands might vary based on the Linux distribution and version you’re using. Also, networking configuration can become complex in HPC clusters due to various requirements such as high performance, redundancy, and specialized protocols like InfiniBand. It’s recommended to consult the documentation of your cluster’s networking hardware and the Linux distribution you’re using to ensure proper configuration.