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Pre-installation setup for all servers
Last Updated: June 30, 2026

This section describes how to perform the initial pre-Installation setup on all ServAssure NXT servers.

Important: Running the Ansible playbook mentioned in Pre-installation setup procedure covers the setup tasks outlined below. CommScope strongly recommends running the playbook over performing these manual steps.

This procedure includes the following:

  1. Edit /etc/sysctl.conf (Cassandra and NXT Engine Servers):

    • Increase vm.max_map_count.

    • Set vm.swappiness to 0.

  2. Edit /etc/security/limits.d/90-nproc.conf (Cassandra Servers):

    • Change open file limits for "cassandra" user.

  3. Edit /etc/security/limits.conf (All Servers):

    • Change user limits.

  4. Create "arris" user (All Servers).
  5. Create an /opt/arris directory, and chown it to "arris" user/group. (All Servers):

    • Location of all software installed for ServAssure NXT.

  6. Disable SELINUX.
  7. Disable firewalld.
  8. Verify and/or install required third-party software packages (All Servers):

    • yum-utils

    • nc

    • unzip

    • dstat

    • openssl

    • nmon

      NOTE: This procedure will reboot all ServAssure NXT nodes, as some of the system settings take effect only on reboot. Make sure to run this procedure before proceeding with the rest of the ServAssure NXT installation.