Follow the instruction on CMTS "Routing / IPs" and add these lines in your /etc/sysconfig/network-scripts/route-... file
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:
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:
change the key in /tftpboot/keyfile. The key in the file will be used, to encrypt all DOCSIS configfiles.