User Manual

ADCP-75-192 • Issue D • October 2005 • Section 3: Network and System Installation and Setup
Page 3-18
 2005, ADC Telecommunications, Inc.
8.3 Clearing of RAN’s
In order to facilitate swap outs of RAN CPUs, it is possible for the RAN Hostname values in
the Hostname table of the Tenant OAM MIB to be cleared by writing a NULL string into the
MIB from the NMS. Doing so will allow that RAN ID to be cleared, and will allow the next
RAN CPU discovered to occupy that RAN ID.
9 HUB NODE ACCESS/MANAGEMENT
9.1 Managing Hub Nodes
The Hub in a Digivance CXD network consists of several racks and chassis, which translate to
several CPUs per HUB. Since these CPUs all reside at a single geographical location, it is
necessary to establish a relationship of each CPU to its rack and chassis location such that field
service personnel can be deployed to the correct location within the Hub when the need arises.
There can be many CPUs at a single Hub Site within the many racks and chassis, but there is
no way to correlate an IP address to its physical rack/chassis location automatically. Therefore,
a convention for identifying racks and chassis needs to be established. At installation time,
each hostname, as written on the front tag of each CPU, must be recorded in conjunction with
its physical location. This information is used when the operator fills in the Hub Node MIB,
which is discussed in detail below. Digivance CXD Hub naming conventions are also
discussed below.
The Hub Node MIB correlates Hub node IP addresses with their hostnames and physical
locations. It resides solely at Hub Master nodes. Refer to Section 11.1 for details.
9.2 Identification using the Network IP Receiver/Sender
The Digivance CXD Hub Master node dynamically keeps track of which nodes are under its
control using a script called NIPRS (Network IP Receiver/Sender). It receives an IP and
hostname from each element in the subnet it controls via the client functionality of NIPR/S,
which runs on all “slave” nodes. NIPR/s senses any changes to its list of slave nodes, and
updates the Hub Master DNS accordingly. The NIPR/S script is also a key component to
maintaining the HUB/RAN Node MIB’s and, ultimately, tenant processing as a whole, since it
is the mechanism by which the HUB/RAN Node MIB entries are filled.
There are two main ways to access the output of NIPR/S for use in the identification of related
nodes. The most accessible way is to utilize SNMP to view the Hub Node MIB and RAN Node
MIB at the Hub Master node. To get an unbroken list of Digivance CXD IP addresses that the
Hub Master is currently servicing, telnet into the Hub Master node on port 7401. No user name
or password is necessary. The output format is a series of text strings, each containing an IP
preceded by a “+” or “-” and terminated with a line feed. The Hub Master is always the first
entry in the list. An example of a typical output for a five-node system is shown in Figure 3-3.