Components of the Network Model
4-6
8000-A2-GB21-20
November 1997
To facilitate management of the DSL cards and HotWire RTUs through the MCC
card:
Assign IP addresses from the management domain to the internal backplane
interfaces of each DSL card and 5446 RTU interface in the same subnet as
the MCC card’s backplane interface (as shown in the previous illustration).
This is a separate subnetwork from the MCC card’s 10BaseT port.
These IP addresses are stored in the Entity MIB on the MCC card where they
can be accessed by the NMS.
NOTE:
Management functions of RTUs associated with an 8540 DSL card are
performed by an internal agent on the 8540 DSL card.
Provide IP addresses on the router’s interface attached to the MCC card for
both subnetworks, so that the router appears to be directly connected to the
MCC card’s Ethernet interface as well as the HotWire DSLAM system
backplane.
In other words, the router’s interface to the MCC can be multihomed to
support proxy ARP.
Discovering Devices on the Network (Discovery)
In the illustration on
page 4-5
, the IP addresses assigned for the router’s
interface to the MCC card are 135.1.2.1 and 135.1.3.254. The second IP address
(135.1.3.254) is on the same subnetwork (135.1.3.0) as the internal addresses of
the DSL cards and the HotWire RTUs. The MCC card will not forward broadcasts
on the management network (135.1.2.n) across the HotWire DSLAM system
backplane because it is a separate subnetwork, as the DSL cards do not need to
be
discovered by the management system.
How does an NMS learn the address of a device beyond the MCC card?
DCE Manager gets the IP address of a DSL card from the Entity MIB on the
MCC card.
After the DCE Manager has learned the IP address of a DSL card through
the Entity MIB, it addresses management traffic directly to that card.
DCE Manager gets the IP address of the 5446 RTU from the Entity MIB on
the DSL card.
After the DCE Manager has learned the IP address of the RTU through the
Entity MIB, it addresses management traffic directly to that RTU.
When the HotWire DSLAM and HotWire RTU systems networks are configured
as described above, the DCE Manager provides a view of the entire network from
information contained in the MCC card’s entity MIB.
