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The NB-30 Bridge Chassis View
2-6 Viewing Chassis Information
The NB-30 Bridge Port Status Display
Each port display on the NB-30 will indicate that portÕs current bridging state:
FWD (Forwarding) (Green) The port is on line and forwarding packets across
the NB-30 from one network segment to another.
DIS (Disabled) (Blue) Bridging at the port has been disabled by
management; no trafÞc can be received or forwarded on
this port, including conÞguration information for the
bridged topology.
LRN (Learning) (Magenta) The Forwarding database is being created, or
the Spanning Tree Algorithm is being executed because
of a network topology change. The port is monitoring
network trafÞc, and learning network addresses.
LIS (Listening) (Magenta) The port is not adding information to the
Þltering database. It is monitoring Bridge Protocol Data
Unit (BPDU) trafÞc while preparing to move to the
forwarding state.
BLK (Blocking) (Orange) The port is on line, but Þltering trafÞc from
going across the NB-30 from one network segment to
another. Bridge topology information will be forwarded
by the port.
BRK (Broken) (Red) The physical interface has malfunctioned.
Chassis Manager
Like most networking devices, CabletronÕs devices draw their functionality from
a collection of proprietary MIBs and IETF RFCs. In addition, CabletronÕs newer
intelligent devices organize their MIB data into a series of Òcomponents.Ó A MIB
component is a logical grouping of MIB data, and each group controls a deÞned
set of objects. Note that there is no one-to-one correspondence between MIBs and
MIB components; a single MIB component might contain objects from several
different proprietary MIBs and RFCs.
The Chassis Manager window, Figure 2-4, is a read-only window that displays
the MIBs and the MIB components Ñ and, therefore, the functionality Ñ
supported by the currently monitored device.
To view the Chassis Manager window:
1. Click on Help on the far right of the menu bar at the top of the Chassis View
window.
2. Drag down to MIBs Supported, and release.