ProSoft Technology RadioLinx RLXIB-IHN User Manual page 69

RLXIB-IHN ♦ 802.11n
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Parameter
RSTP Status
Ethernet Edge Port
Priority
Hello Time
Max Age
Forward Delay
Cost for Ethernet
Interface
Cost for Radio Interface 1 Cost of using a radio interface 1 based connection.
Cost for Radio Interface 2 Cost of using a radio interface 2 based connection (if applicable).
Click Apply to save your changes.
Click Clear to discard your changes.
Spanning Tree shuts off ports as necessary to prevent loops. If loops are created
in an Ethernet network, packets can be circulated endlessly, consuming all the
bandwidth and making the network unusable.
RSTP allows users to create truly redundant connections between any two points
in the network. The radios detect the redundant paths and keep one connection
alive for communications. If the primary connection fails for any reason, the
secondary connection is quickly transitioned to a state to forward packets,
allowing the network to adapt itself to handle problems without customer
intervention.
RSTP uses active communications between network devices to propagate
changes in the network and to cause transitions to occur much more quickly.
Because RSTP is an IEEE standard, IH radios work in conjunction with wired
Ethernet switches to form a redundant network.
Each RSTP device (RLXIB-IHN Radio or Ethernet switch) communicates with
other RSTP devices in the network via packets called Bridge Protocol Data Units
(BPDUs). BPDUs are sent out each of the devices ports. In a wired switch this
would be from each of the Ethernet ports. In an RLXIB-IHN Radio, in addition to
the Ethernet port, each wireless link is considered a port. These BPDUs are the
communications means to allow each RSTP device in the network to make sure
that the proper connections still exist.
ProSoft Technology, Inc.
May 23, 2011
Description
Use the dropdown menu to enable or disable RSTP for this device.
Specify whether Ethernet port on the device is connected to another
RSTP enabled device. If yes, the edge port property is set to Disable.
This is the priority component of the bridge identifier of this node. The
priority value should be a multiple of 4096.
Hello time of the bridge represents the time interval between
transmissions of RSTP BPDUs. The value should be between 1 and 10
seconds, with 2 seconds as the default.
Max age is the upper limit on the number of hops the information in a
BPDU can traverse. This can be between 6 and 28 seconds, with 20
seconds as the default.
Forward delay is the time spent by a port in Learning state before
moving to the Forwarding state. This can be between 15 and 30
seconds, with 15 seconds as the default.
Cost of using Ethernet interface on AP.
RadioLinx Configuration Manager
User Manual
Page 69 of 171