SMC Networks TigerAccess SMC7816M Instrukcja Użytkownika Pobierz pdf (Strona 784)

100

101

PANNING

REE

OMMANDS

31-4

spanning-tree mode

This command selects the spanning tree mode for this switch. Use the no

form to restore the default.

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

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