Cabletron Systems SPECTRUM, User Manual

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Using the 7C0x SmartSwitch Hub View
2-14 Monitoring Hub Performance
• DIS (disabled) — the port has been disabled by management; no traffic can be
received or forwarded on this port, including configuration information for
the bridged topology.
• LIS (listening) — the port is not adding information to the filtering database;
it is monitoring Bridge Protocol Data Unit (BPDU) traffic while preparing to
move to the forwarding state.
• LRN (learning) — the filtering database is being created, or the Spanning Tree
Algorithm is being executed because of a network topology change. The port
is monitoring network traffic, learning network addresses.
• BLK (blocking) — the port is on-line, but filtering traffic from going across the
7C0x SmartSwitch from one network segment to another. Bridge topology
information is still being forwarded.
• BRK (broken) — the physical interface has malfunctioned.
Tp Frames Forwarded
Displays the percentage of total frames received that were transparently
forwarded across the selected interface.
Tp Frames Filtered
Displays the percentage of total frames received that were filtered at the selected
interface.
Sr Frames Forwarded
Displays the rate at which source route frames are being forwarded across the
selected interface, in a frames/second format. Note that this option is currently
grayed out, as no Token Ring NIMs are yet available.
Bridge Port Number
Displays the index number assigned to each bridge port interface. Bridge ports
are indexed from left to right by module, beginning with the module installed in
slot 2; on each module, bridge port numbering follows the physical port indexing.
For example, the port display illustration in
Figure 2-9 ( page 2-13 ) contains eight
bridge interfaces: the two interfaces on the FDDI module installed in slot 2 are
bridge port numbers 1 and 2 (corresponding to physical ports 1 and 2); the six
interfaces on the Fast Ethernet module installed in slot 3 are bridge ports 3
through 8 (corresponding to physical ports 1 through 6).
NOTE
You will note that some Ethernet modules display an upside-down port indexing, with the
highest index numbers at the top of the module, and the lowest ones at the bottom; for
these modules, the bridge port numbers will still follow the physical port indexing, with
the higher bridge port numbers corresponding to the higher physical port indices.