FibroLAN Falcon-RX/812/G/A, Руководство пользователя

Страница: 190 / 333

Falcon R-Class | User Guide
190
Table 4-129: CIST Port Configuration displays Parameters
CIST Aggregated and Normal Port Configurations
Port The switch port number of the logical STP port.
STP Enabled Controls whether STP is enabled on this switch port.
Path Cost Controls the path cost incurred by the port. The Auto setting will set the path
cost as appropriate by the physical link speed, using the 802.1D recommended
values. Using the
Specific setting, a user-defined value can be entered. The
path cost is used when establishing the active topology of the network. Lower
path cost ports are chosen as forwarding ports in favor of higher path cost
ports. Valid values are in the range 1 to 200000000.
Priority Controls the port priority. This can be used to control priority of ports having
identical port cost. (See above).
OperEdge (state
flag) Operational flag describing whether the port is connecting directly to edge
devices. (No Bridges attached). Transitioning to the forwarding state is faster
for edge ports (having
operEdge
true) than for other ports. The value of this flag
is based on AdminEdge and AutoEdge fields. This flag is displayed as Edge in
Monitor -> Spanning Tree -> STP Detailed Bridge Status .
AdminEdge Controls whether the
operEdge
flag should start as being set or cleared. (The
initial
operEdge
state when a port is initialized).
AutoEdge Controls whether the bridge should enable automatic edge detection on the
bridge port. This allows
operEdge to be derived from whether BPDU's are
received on the port or not.
Restricted Role If enabled, causes the port not to be selected as Root Port for the CIST or any
MSTI, even if it has the best spanning tree priority vector.
Such a port will be selected as an Alternate Port after the Root Port has been
selected.
If set, it can cause lack of spanning tree connectivity. It can be set by a network
administrator to prevent bridges external to a core region of the network
influencing the spanning tree active topology, possibly because those bridges
are not under the full control of the administrator. This feature is also known
as
Root Guard .
Restricted TCN If enabled, causes the port not to propagate received topology change
notifications and topology changes to other ports.
If set it can cause temporary loss of connectivity after changes in a spanning
trees active topology as a result of persistent incorrectly learned station
location information.
It is set by a network administrator to prevent bridges external to a core region
of the network, causing address flushing in that region, possibly because those
bridges are not under the full control of the administrator or is the physical
link state for the attached LANs changing frequently.