The prerequisites to allow the ADP-Hm process to automatically discover a 7705 SAR-Hm series router are:
An NSP NFM-P has been procured, installed, and is managing one or more head-end nodes defined for the cellular domain.
A valid SIM card is inserted into SIM slot 1 on the node. For dual SIM operation a second SIM is inserted into SIM slot 2.
For those variants of the 7705 SAR-Hm series node with a unique factory-set password which must be changed at first login, the new password must match the password expected by the NSP NFM-P being used to discover the node during the ADP-Hm process.
The operator has determined whether the one-step or two-step process will be used by the NSP NFM-P and configures it as such.
For each carrier private VPN service associated with each installed SIM, a route exists for the NFM-P from the carrier private VPN service or the private-LTE cellular Evolved Packet Core (EPC) toward the cellular domain head-end node or nodes that have reachability to the NSP NFM-P. These gateway nodes allow new 7705 SAR-Hm nodes running ADP-Hm to reach the NSP NFM-P.
A route for the subnet of the cellular domain nodes exists from the cellular domain head-end node to the new node to be discovered. For initial installation of a cellular domain, IP addresses are typically allocated from a /24 or /18 IP address range and the associated routes can be used. In a dual SIM deployment, there must exist a route for the IP addresses associated with each SIM.
A default Access Point Name (APN) or Virtual Private Network (VPN) service has been procured from the service provider for the SIMs that are installed in the node. If a fixed/static IP address for the IMSI associated with the SIM is required, the address can be allocated in two ways for each SIM:
by direct Home Subscriber Server (HSS) allocation (such as when a mobile carrier assigns IP addresses for the SIM and IMSI).
by a Radius/AAA/DHCP server owned by the enterprise operator. This method uses a process known as deferred IP allocation between the Home Subscriber Server (HSS) and the PGW of the wireless service provider. When the node first connects and authenticates with the HSS of the wireless provider, the default APN associated with the service indicates that the IP allocation is deferred to the enterprise Radius/AAA/DHCP server. After the PGW learns the static IP address from the server, it is sent to the node in the PDP address IE when the default bearer is established.
The PGW to which the node will attach using the SIM in slot 1 is configured with additional Protocol Configuration Options (PCO) for the APN. The PCO must include the following two values:
dns-server-ipv4 primary – for example, config/mobile/pdn/apn/pco/dns-serveripv4 primary
dns-server-ipv4 secondary – for example, config/mobile/pdn/apn/pco/dns-serveripv4/backup
A primary and secondary DNS server (available from a wireless provider or owned by an enterprise operator) are configured to resolve the NSP NFM-P IP primary and backup NSP NFM-P IP addresses.
A SAR-Hm.xml file is loaded on the NSP NFM-P for the cellular domain where the node will reside after discovery. The XML file lists the SIM IMSIs for SIM slot 1 and the node's associated system IP addresses (if specified in the XML file) of each node that needs to be discovered. In a dual SIM deployment, the SIM in slot 2 is not referred to in this XML file. See the NSP NFM-P User Guide for more information about configuring cellular domains and the associated XML files.
The operator has enabled ADP-Hm on the NSP NFM-P for the associated prefix addresses of the nodes to be discovered using ADP-Hm in the cellular domain.