Optical Systems Design OSD2524, User Manual

Page: 138 / 402

OPTICAL SYSTEMS DESIGN
DOC ID: 10120001
OSD2524 OPERATOR MANUAL
PAGE 138
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.