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Ping Discovery System ( PDS )
PDS is a process by which a console node discovers other nodes that are capable of being
managed. This service is used by the LDSM console to discover the servers with LDSM
installed. This service has two parts:
Full discovery - a ping is sent over the network to which LDSM servers to reply. If a CBA
is present on the server, a ping is sent back to the requesting console with its reply
information. This information is stored on the console used to populate the discovered
server tree for that console.
Refresh discovery - is similar to full discovery option, but rather than sending a packet on
the wire to all servers, it uses the information stored at the console as a request list, and
send s a ping only to those servers. The discovered server tree list is rebuilt based on the
reply from those servers at that moment. If the server fails to reply, its discovered icon is
grayed in the tree, indicating it is no longer available.
Network Transport Service (NTS)
Network Transport Service is a set of APIs which shield LDSM from the complexities of
networking protocol detail of sending and receiving data. NTS is designed so that it will
not have to change for different operating systems. For example, the SMM agent will use
the same NTS API whether it is running on Netware or Windows NT. The NTS code is
optimized to take advantage of the services available on a particular operating system, and
are transparent to the LDSM agents. NTS offers routines, which allow for guaranteed
delivery of sequenced packets. The protocol is designed to allow packets to be sent in size
of up to 65,535 bytes. NTS will fragment the packet on the network wire and receive the
packet into a buffer of at least the same size. NTS consists of three main pieces. A
transport layer that communicates to the network. A message system that process
information between each of the multiple agents on a server. A proxy which services as a
bridge connecting this message system and transport layer.
Before you install the LDSM, please make sure you already installed the ASMM into the
server. The ASMM is fully compatible with LDSM, HP Openview, NT Performance
Monitor, NT Web Admin, Microsoft SMS and so on.