ZyXEL Communications 1 - Manual (Page 104)

NetAtlas Enterprise 1.00 User’s Guide
103 Chapter 11 Switch Configuration
11.5.1 Configuring STP Parameters
1 In the Device Panel list, select a device and then right-click.
2 Click Configuration, Switch Configuration and then the Switch Setup tab.
3 Select the STP Configuration check box and then click Apply.
4 Click Configuration, Switch Configuration and then the STP Conf. tab to display the
following screen.
Figure 76 Configuration: Switch Configuration: STP Conf.
The following table describes the labels in this screen.
Table 33 Configuration: Switch Configuration: STP Conf.
LABEL DESCRIPTION
Priority Priority is used in determining the root device, root port and designated
port. The device with the highest priority (lowest numeric value) becomes
the RSTP root device. If all devices have the same priority, the device with
the lowest MAC address will then become the root device. The allowed
range is 0 to 65535 (32768 is the default).
The lower the numeric value you assign, the higher the priority for this
bridge.
Priority determines the root bridge, which in turn determines Hello Time,
Max Age and Forward Delay.
Max Age This is the maximum time (in seconds) a device can wait without receiving
a BPDU before attempting to reconfigure. All device ports (except for
designated ports) should receive BPDUs at regular intervals. Any port that
ages out STP information (provided in the last BPDU) becomes the
designated port for the attached LAN. If it is a root port, a new root port is
selected from among the device ports attached to the network. The
allowed range is 6 to 40 seconds (20 is the default).
Hello Time This is the time interval in seconds between BPDU (Bridge Protocol Data
Units) configuration message generations (by all devices in RSTP or the
root device in STP). The allowed range is 1 to 10 seconds (2 is the
default).