Linksys SRW224G4P manual Spanning Tree STP Port Settings

Chapter 5 Configuring the Switch

Spanning Tree Type  Specifies the type of spanning tree used on the Switch:

•STP  Spanning Tree Protocol (IEEE 802..1D); i..e.., when this option is selected, the Switch will use RSTP set to STP forced compatibility mode)..

•RSTP  Rapid Spanning Tree Protocol (IEEE 802..1w).. RSTP is the default..

•MSTP  Multiple Spanning Tree Protocol (IEEE 802..1s)..

BPDU Handling  The maximum transmission rate for BPDUsisspecifiedbysettingtheminimumintervalbetween the transmission of consecutive protocol messages.. Select the transmission rate from the drop‑down menu.. (Range: 1-10; Default: 3)

Path Cost Method  The path cost is used to determine the best path between devices.. The path cost method is used to determine the range of values that can be assigned to each interface.. Select the method from the drop-down menu..

•Long  Specifies 32-bit based values that range from 1- 200,000,000.. (This is the default..)

•Short  Specifies 16-bit based values that range from 1-65535..

Priority  Bridge priority is used in selecting the root device, root port, and designated port.. The device with the highest priority becomes the STA root device.. However, if all devices have the same priority, the device with the lowest MAC address will then become the root device..

NOTE: Lower numeric values indicate higher priority..

Enter a value for the bridge priority into the Priority text field.. The value must be within the range below and in steps of 4096.. A full list of valid values are provided below..

Default: 32768

Range: 0-61440, in steps of 4096

Options: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344, 61440

Hello Time  Interval (in seconds) at which the root device transmits a configuration message.. To enable Hello Time click the Hello Time option and enter the required interval value in the Hello Time field..

Default: 2

Minimum: 1

Maximum: The lower of 10 or [(Max.. Message Age / 2) -1]

Maximum Age  The maximum time (in seconds) a device can wait without receiving a configuration message before attempting to reconfigure.. All device ports (except for designated ports) should receive configuration messages at regular intervals.. Any port that ages out STP information (provided in the last configuration message) 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.. (References to “ports” in this section mean “interfaces,” which includes both ports and LAGs..) To enable Maximum Age click the Maximum Age option and enter the required time (in seconds) in the Maximum Age field..

Default: 20

Minimum: The higher of 6 or [2 x (Hello Time + 1)]..

Maximum: The lower of 40 or [2 x (Forward Delay - 1)]

Forward Delay  The maximum time (in seconds) this device will wait before changing states (i..e.., discarding to learning to forwarding).. 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 discarding state; otherwise, temporary data loops might result.. To enable Forward Delay, click the Forward Delay option and enter the maximum time (in seconds) in the Forward Delay field..

Default: 15

Minimum: The higher of 4 or [(Max.. Message Age / 2) + 1]

Maximum: 30

Modify the required attributes for STP.. Click Save Settings to save the changes..

Spanning Tree > STP Port Settings

Spanning Tree > STP Port Settings

24-Port 10/100 + 4-Port Gigabit Switch with WebView and Power over Ethernet 37