Mstp - Tripp Lite NGI-M08C4POE8-2 Owner's Manual

This is the time interval (in seconds) at which the root switch transmits a
Hello Time configuration message. The root bridge determines Hello Time, Max Age
and Forwarding Delay.
This is the time (in seconds) the root switch will wait before changing
Forward Delay
states.
Refresh Click Refresh to begin configuring this screen afresh.
Current Bridge Status
MAC address This is the MAC address of the current bridge.
Priority is used in determining the root switch, root port and designated
port. The switch with the highest priority (lowest numeric value) becomes
the STP root switch. If all switches have the same priority, the switch with
Priority
the lowest MAC address will then become the root switch.
Priority determines the root bridge, which in turn determines the Root
Hello Time, Root Maximum Age and Root Forwarding Delay.
This is the maximum time (in seconds) the Switch can wait without
receiving a BPDU before attempting to reconfigure. All Switch ports
(except for designated ports) should receive BPDUs at regular intervals.
MAX Age Any port that age 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 Switch ports attached to the
network.
This is the time interval in seconds between BPDU (Bridge Protocol Data
Hello Time
Units) configuration message generations by the root switch.
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
Forward Delay
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.
Path cost is the cost of transmitting a frame on to a LAN through that
Path Cost port. It is recommended to assign this value according to the speed of the
bridge. The slower the media, the higher the cost.
This is the number of the port on the Switch through which this Switch
Root Cost
must communicate with the root of the Spanning Tree.

6.15.4 MSTP

MSTP (IEEE 802.1S Multiple STP), which uses RSTP for rapid convergence, enables
VLANs to be grouped into a spanning-tree instance, with each instance having a spanning-tree
topology independent of other spanning-tree instances. This architecture provides multiple
forwarding paths for data traffic, enables load balancing, and reduces the number of spanning-
tree instances required to support a large number of VLANs.
Multiple Spanning-Tree Regions:
For switches to participate in multiple spanning-tree (MST) instances, you must consistently
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