OPTICAL SYSTEMS DESIGN
DOC ID: 10118101
OSD2512 OPERATOR MANUAL
PAGE 139
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). Transition 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 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 influence 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 tree's active topology as a result of persistently incorrect 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 the physical link state of the attached
LANs transits frequently.
BPDU Guard
If enabled, causes the port to disable itself upon receiving valid BPDU's. Contrary to the
similar bridge setting, the port
Edge
status does not effect this setting.
A port entering error-disabled state due to this setting is subject to the bridge Port Error
Recovery setting as well.
Point-to-Point
Controls whether the port connects to a point-to-point LAN rather than to a shared medium.
This can be automatically determined, or forced either true or false. Transition to the
forwarding state is faster for point-to-point LANs than for shared media.
Buttons
: Click to save changes.
: Click to undo any changes made locally and revert to previously saved
values.
