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2-4 CHAPTER 2: CONFIGURING AND LAUNCHING THE ATM AND VLAN MANAGER
CAUTION: Do not start the ATM and VLAN Network Manager until all
the ATM and VLAN devices have been discovered and appear in the IP
Map of the management platform.
Setting Up for
Distributed Polling
Polling in SNMP management is the activity whereby the NMS
interrogates/polls individual nodes on the network for their current
status. It is one if the most important sources of network management
control for traffic on the network.
The ATM and VLAN Management application maintains the status and
state of all the logical and physical components of the network. You
cannot rely on the platform poller alone (such as HPOV SNMP Poller)
which only maintains the “ping” status of the network when using the
application. The ATM and VLAN Management application uses a
platform-independent poller called the Mediation Poller or Medp to
actively maintain the status of all the components it is monitoring.
Starting the Poller Locally
In small networks consisting of less than a 100 network devices (ATM and
Non-ATM switches), a single central poller is adequate for polling the
network and maintaining the state of the logical and physical network. In
these types of networks, the Mediation Poller can reside on the NMS. The
default configuration installs the mediation poller when the ATM and
VLAN Management application is installed. The poller is initialized and
activated along with other network management platform processes.
Starting the Poller on Multiple Distributed Machines
When using the application to manage a larger network, consisting of
many network devices, or when the network is managed over a wide
area, it is possible to distribute the polling.
Distributing polling onto more than one machine has several advantages.
The advantages are:
■ Localizes polling in remote sites so as not to send polling traffic on
WAN links.
■ Distributes the polling load onto several machines to get better polling
performance and SNMP traffic distribution.
■ Frees up CPU resources on the central management station, thus
providing better console performance.