The 7705 SAR-Hm series of routers supports the following modes of operation over a cellular network:
static cellular system IPv4 mode
static cellular interface IPv4 mode or IPv6 mode
dynamic cellular interface IPv4 mode or IPv6 mode
The way in which the node is managed depends on which mode of operation is in use. See Services over the cellular PDN interface for more information about the modes of operation.
When a cellular port on the node is operating in static cellular system IP mode, the system IP address is identical to the cellular IP address assigned during the initial PDN attachment process. To manage the node in this mode, the NSP NFM-P or other network management platform reaches the node without using the system IP address directly over the cellular network. This is the only mode that does not require a pre-established in-band management service to manage the node.
When a cellular port on the node is operating in static cellular interface IP mode or dynamic cellular interface IP mode, the NSP NFM-P or other network management platform can only reach the node through an in-band management VPRN service. For these modes of operation, the system IP address used to manage the node is private and differs from the cellular port IP address assigned when connecting to the cellular network. The system IP address must be advertised from the 7705 SAR-Hm series node to the head-end node by the in-band management VPRN service. Routing in the private IP/MPLS network past the head-end node must allow management traffic to reach the head-end node which will then send the management traffic over the VPRN to the node being managed.
The NSP NFM-P automatically configures the required in-band management VPRN service during the ADP-Hm process; see ADP-Hm for more information.
On the 7705 SAR-Hm series nodes, there are two methods for enabling in-band management over a VPRN service:
performing a Global Routing Table (GRT) lookup and VPRN-to-GRT route leaking
using port cross-connect