ZyXEL Communications MGS3600-24F User Manual page 168

F M
RONT ATTER
Restricted Role:

Check this check box to prevent this port from becoming a Root Port. If this port has the best spanning tree priority vector, another port will
become the Root Port and this port will become an Alternate Port. The restricted role can be used to prevent bridges outside the core region
of the network from changing the spanning tree active topology in the core, possibly because non-core bridges are not under the full control
of the administrator. This feature is also known as Root Guard.
Note:
The restricted role can cause a lack of spanning tree connectivity.
Restricted TCN:

Check this check box to restrict propagation of received topology change notifications and topology changes to other ports. Restricted TCN
can cause temporary loss of connectivity after changes in a spanning tree's active topology as a result of persistently incorrect learned sta-
tion location information. Restricted TCN is used to prevent bridges outside the core region of the network from causing address flushing in
that region, possibly because non-core bridges are not under the full control of the administrator or the physical link state of the attached
LANs transits frequently.
BPDU Guard:

Check this check box to make the port disable itself upon receiving a valid BPDU. This is independent of the port edge status. Disabled
ports enter the error-disabled state and are removed from the active topology. A port in the error-disabled state is subject to the bridge Port
Error Recovery configuration.
Point-to-point:

Use this drop-down box to configure whether the port is connected to point-to-point or shared media. Choose
media, choose Forced False
to-point media.
MGS3600-24F/XGS3600-26F/XGS3600-28F
for shared media or choose Auto to let the switch decide. Transition to the forwarding state is faster for point-
7-35
Forced True for point-to-point
U ' G
SER S UIDE