Configure the CMTS

Owned by Torsten Schmidt
Last updated: Jul 09, 2019
2 min read

1. Open CMTS Setup Page

Go to Provisioining –> CMTS

See the "Assigned Config" –> "Setup"

  • Follow Setup Instructions for a first default config
    Setup Blade for default config


2. Add  the CMTS to the Provisioning Servers routing

Step 2. is only required for Hosting your own Server.

For Cloud Installation this will be done by the CMTS-Tunnel.

Follow the instruction on CMTS "Routing / IPs" and add these lines in your /etc/sysconfig/network-scripts/route-... file

Setup for routing


Restart Network

systemctl restart network


NOTE: if red lines / errors appear: this means that there is a route in your route file missing or miss configured. You should (MUST) fix this!


3. Check CMTS IP Bundle IPs

Check if the CMTS has the required Bundle IPs like proposed by this section. No red lines means everything is okay and reachable:

Setup for routing

4. Add SSH key

crypto key generate rsa general-keys modulus 1024


(5. optional: change shared secret)

NMS PRIME default shared secret is "DOCSIS". Changing this is recommand for production systems, since it is a security threat using default here. To change this do:

  1. change the key in /tftpboot/keyfile. The key in the file will be used, to encrypt all DOCSIS configfiles.

  2. change shared secret statement inside the CMTS

    interface cable <...>
  cable shared-secret 7 <the secret>

    See for further Informations on Cisco CMTS's: https://www.cisco.com/c/en/us/td/docs/cable/cmts/config_guide/b_cisco_cmts_scg/b_cisco_cmts_scg_chapter_0111101.pdf