INS_CWGE26FX2TX24MSPOE_REV– 5 Mar 2014 PAGE 41
INSTALLATION AND OPERATION MANUAL
CWGE26FX2TX24MSPOE
TECH SUPPORT: 1.888.678.9427
CIST Ports
This page allows the user to inspect the current STP CIST port configurations, and possibly change
them as well. This page contains settings for physical and aggregated ports. The aggregation
settings are stack global.
Label
Description
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).
OpenEdge (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 openEdge true) than for other ports.
AdminEdge
Controls whether the openEdge flag should start as being set or cleared. (The initial
openEdge state when a port is initialized).
AutoEdge
Controls whether the bridge should enable automatic edge detection on the bridge
port. This allows openEdge 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 know as Root Guard.
