Accton Technology ES3528M-SFP manual Spanning-tree mode, Rstp

Spanning Tree Commands 4

an STA-compliant switch, bridge or router) in your network to ensure that only one route exists between any two stations on the network, and provide backup links which automatically take over when a primary link goes down.

Example

This example shows how to enable the Spanning Tree Algorithm for the switch:

Console(config)#spanning-tree

Console(config)#

spanning-tree mode

This command selects the spanning tree mode for this switch. Use the no form to restore the default.

Note: MSTP is not supported in the current software.

Syntax

spanning-tree mode {stp rstp mstp} no spanning-tree mode

•stp - Spanning Tree Protocol (IEEE 802.1D)

•rstp - Rapid Spanning Tree Protocol (IEEE 802.1w)

•mstp - Multiple Spanning Tree (IEEE 802.1s)

Default Setting

rstp

Command Mode

Global Configuration

Command Usage

•Spanning Tree Protocol

Uses RSTP for the internal state machine, but sends only 802.1D BPDUs.

-This creates one spanning tree instance for the entire network. If multiple VLANs are implemented on a network, the path between specific VLAN members may be inadvertently disabled to prevent network loops, thus isolating group members. When operating multiple VLANs, we recommend selecting the MSTP option.

•Rapid Spanning Tree Protocol

RSTP supports connections to either STP or RSTP nodes by monitoring the incoming protocol messages and dynamically adjusting the type of protocol messages the RSTP node transmits, as described below:

-STP Mode – If the switch receives an 802.1D BPDU after a port’s migration delay timer expires, the switch assumes it is connected to an 802.1D bridge and starts using only 802.1D BPDUs.

-RSTP Mode – If RSTP is using 802.1D BPDUs on a port and receives an RSTP BPDU after the migration delay expires, RSTP restarts the migration delay timer and begins using RSTP BPDUs on that port.

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