Multiple Rapid Spanning Tree Protocol Status - ZyXEL Communications GS1920v2 Series User Manual

Table 53 Advanced Application > Spanning Tree Protocol > MRSTP (continued)
L ABEL
Forwarding Delay
Port
*
Active
Edge
Priority
Path Cost
Tree
Apply
Cancel
13.7 Multiple Ra pid Spa nning T re e Pro to c o l Sta tus
Click
Adva nc e d Applic a tio n
screen as shown next. See
Note: This screen is only available after you activate MRSTP on the Switch.
Chapter 13 Spanning Tree Protocol
DESC RIPT IO N
This is the maximum time (in seconds) the Switch will wait before changing states. This delay is
required because every switch must receive information about topology changes before it
starts to forward frames. In addition, each port needs time to listen for conflicting information
that would make it return to a blocking state; otherwise, temporary data loops might result.
The allowed range is 4 to 30 seconds.
As a general rule:
Note: 2 * (Forward Delay - 1) >= Max Age >= 2 * (Hello Time + 1)
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.
Select this check box to activate STP on this port.
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).
Configure the priority for each port here.
Priority decides which port should be disabled when more than one port forms a loop in a
switch. Ports with a higher priority numeric value are disabled first. The allowed range is
between 0 and 255 and the default value is 128.
Path cost is the cost of transmitting a frame on to a LAN through that port. It is recommended
to assign this value according to the speed of the bridge. The slower the media, the higher the
cost - see Table 48 on page 136
Select which STP tree configuration this port should participate in.
Click to save your changes to the Switch's run-time memory. The Switch loses these
Apply
changes if it is turned off or loses power, so use the
save your changes to the non-volatile memory when you are done configuring.
Click to begin configuring this screen afresh.
C a nc e l
>
Spa nning T re e Pro to c o l
Section 13.1 on page 135
GS1920v2 Series User's Guide
144
for more information.
link on the top navigation panel to
Sa ve
in the navigation panel to display the status
for more information on MRSTP.