LANCOM GS
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Chapter 4: Operation of Web- based Management
33
EN
4.2.7
RSTP
Rapid Spanning Tree protocol (RSTP) detects and resolves network loops,
respectively in case of need (breakdown of a connection) to activate it again.
The protocol allows a switch to communicate with other RSTP compliant swit-
ches and to ensure, that only one path exists between two end points in your
network.
Parameter:
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System Priority:
System priority is used to determine the root switch, thus the root of the
spanning tree. The switch with the highest priority (lowest numeric value)
becomes the root switch. If all switches have the same priority, the switch
with the lowest MAC address will become the root switch. Select a value
from the drop-down list box. (The lower the numeric value you assign, the
higher the priority for this system.)
Default: 32768
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Hello Time:
Hello Time is the time interval, in which the switch tells the following
devices in the spanning tree, with a “hello packet”, that it is still active. If
for example the LANCOM Switch is the root switch of the LAN, all other
bridges will use the hello time assigned by this switch to communicate
with each other. The allowed range is 1-10 second.
Default: 2 seconds
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Max. Age:
If there are no “hello packets” for a certain time, a device in the spanning
tree assumes a change in the structure. In this case all connections in the
network need to be established again.
Maximum Age is the maximum time a switch can wait without receiving
a “hello packet” before attempting to reconfigure. During this time of
reconfiguration, all STP-capable devices in the network send only admi-
nistration packets, but no reference data of the connected devices.
The valid value of Max. Age is 6 -40 seconds.
Default: 20 seconds
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Forward Delay:
Forward delay time is the maximum time (in seconds) a switch waits
before changing its state.
