Optical Systems Design OSD2790SFP User Manual page 131

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.
PAGE 131
OPTICAL SYSTEMS DESIGN
OSD2790SFP OPERATOR MANUAL
DOC ID: 10118801