ZyXEL NetAtlas User Guide - Page 180
Switch Configuration > STP: MSTP continued
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Chapter 14 Switch Configuration Table 87 Switch Configuration > STP: MSTP (continued) LABEL DESCRIPTION Max Age (sec) 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). Forward Delay (sec) This is the maximum time (in seconds) a device will wait before changing states. This delay is required because every device 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 (15 is the default). Config Name Enter a descriptive name (up to 32 characters) of an MST region. Revision Number Enter a number to identify a region's configuration. Devices must have the same revision number to belong to the same region. Max Hops Enter the number of hops (between 1 and 255) in an MSTP region before the BPDU is discarded and the port information is aged. Apply Click Apply to save your changes. Copy to... Click the Copy to.. button to copy the configuration from the device that you are currently configuring to other device(s) of the same model. MST ID This field displays the ID of an MST instance. Priority This field displays the priority of the device for the MST instance. VLAN This field displays the VID (or VID ranges) to which the MST instance is mapped. New... Click New... to create a new MST instance. Modify... Select an MST instance and click the Modify... button to open a screen where you can change the settings. Delete Select an MST instance and then click the Delete button to remove it. Copy to... Click the Copy to.. button to copy the configuration from the device that you are currently configuring to other device(s) of the same model. Close Click Close to exit this screen. 180 NetAtlas EPON Manager User's Guide