Cabletron Systems NB20E - Manual (Page 13)

INTRODUCTION
1-7
if all three bridges are on line and Node A sends a packet to Node B. The
packet will be forwarded through Bridges 1 and 3, and through Bridge 2,
causing the packet to be circulated many times around the data loop. If
Bridge 1 has priority over Bridge 2, the Spanning Tree Algorithm will
place Bridge 2 in blocking, preventing the packet from being forwarded
through Bridge 2. If Bridge 1 should fail, the Spanning Tree Algorithm
will be modified automatically so that the packet will be forwarded
through Bridge 2.
1.6 REMOTE LANVIEW
Both the NB20E and the NB25E can be controlled and managed by
Cabletron Systems' optional Remote LANVIEW - Network Control
Management for the Cabletron Systems' Bridges. Remote LANVIEW
allows you to control and manage multiple NB20Es or NB25Es from a
single Ethernet Workstation through Cabletron System NCM-DOS™ or
Remote LANVIEW/Windows™ or an individual NB25E through an
RS232 port on the bridge.
Remote LANVIEW provides the necessary management tools so that a
bridge can operate at its full capacity. The network manager's ability to set
up parameters within Remote LANVIEW ensures optimal performance
for each bridge, and, hence, each network. For example, a network
manager can monitor: the flow of traffic through a bridge, the status of a
database, the bridge protocol and port parameters, and the bridge setup.
The number of frames received at the bridge is recorded as well as a
breakdown of the progress through the bridge, for example the frames
discarded inbound or the frames forwarded outbound. A breakdown of
errors is provided so the network manager can pinpoint potential problem
areas in a network.
Bridge protocol and port parameters such as Topology Change,
Designated Root, and Path Cost are provided, so that the network
manager can keep track of bridge activity and cost. Certain parameters
can be altered to accommodate a network's particular requirements.
Remote LANVIEW provides the network manager with the necessary
control to operate a bridge effectively. For instance, a network manager
can alter bridge setup, erase a database, disable or restart a bridge, reset
counters, or restore default settings.