ZyXEL Communications MES3500 Series, User Manual

Page: 131 / 370

Chapter 13 Spanning Tree Protocol
MES3500 Series User’s Guide
131
Figure 68
Advanced Application > Spanning Tree Protocol > MSTP > Port
The following table describes the labels in this screen.
Table 37
Advanced Application > Spanning Tree Protocol > MSTP > Port
LABEL DESCRIPTION
Port This field displays the port number.
* Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this row first to set
the common settings and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you make them.
Edge Select this check box to configure a port as an edge port when it is directly attached to a
computer. An edge port changes its initial STP port state from blocking state to forwarding state
immediately without going through listening and learning states right after the port is configured
as an edge port or when its link status changes.
Note: An edge port becomes a non-edge port as soon as it receives a Bridge Protocol Data Unit
(BPDU).
Root
Guard Select this check box to enable root guard on this port in order to prevent the switch(es) attached
to the port from becoming the root bridge.
With root guard enabled, a port is blocked when the Switch receives a superior BPDU on it. The
Switch allows traffic to pass through this port again when the switch connected to the port stops to
send superior BPDUs.
Apply Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring this screen afresh.