Spanning tree > rstp port settings, Chapter 5, Advanced configuration – Linksys BUSINESS SERIES SRW224G4 User Manual

Page 53

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Chapter 5

Advanced Configuration

46

WebView Switches

Path Cost

Indicates the port contribution to the root

path cost. The path cost is adjusted to a higher or lower
value, and is used to forward traffic when a path being
rerouted.

Default Path Cost

When selected the default path cost

is implemented.

Priority

Priority value of the port. The priority value

influences the port choice when a bridge has two ports
connected in a loop. The priority value is between 0–240.
The priority value is provided in increments of 16.

Designated Bridge ID

Indicates the bridge priority and

the MAC Address of the designated bridge.

Designated Port ID

Indicates the selected port’s priority

and interface.

Designated Cost

Indicates the cost of the port

participating in the STP topology. Ports with a lower cost
are less likely to be blocked if STP detects loops.

Forward Transitions

Indicates the number of times the

port has changed from the Blocking state to Forwarding
state.

Spanning Tree > RSTP Port Settings

While the classic spanning tree prevents Layer 2 forwarding
loops in a general network topology, convergence can take
between 30–60 seconds. This time may delay detecting
possible loops, and propagating status topology changes.
Rapid Spanning Tree Protocol (RSTP) detects and uses
network topologies that allow a faster STP convergence
without creating forwarding loops.

Spanning Tree > RSTP Port Settings

Interface

Displays the port or LAG on which Rapid STP

is enabled.

Role

Indicates the port role assigned by the STP algorithm

in order to provide to STP paths. The possible field values
are:

Root

Provides the lowest cost path to forward packets

to root switch.

Designated

Indicates that the port or LAG via which

the designated switch is attached to the LAN.

Alternate

Provides an alternate path to the root

switch from the root interface.

Backup

Provides a backup path to the designated

port path toward the Spanning Tree leaves. Backup
ports occur only when two ports are connected in a
loop by a point-to-point link. Backup ports also occur
when a LAN has two or more connections connected
to a shared segment.

Disabled

Indicates the port is not participating in the

Spanning Tree.

Mode

Indicates the current Spanning Tree mode. The

Spanning Tree mode is selected in the Global STP screen.
The possible field values are:

Classic STP

Indicates that Classic STP is enabled on

the device.

Rapid STP

Indicates that Rapid STP is enabled on the

device.

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